CN118173036A - Control circuit and control method of display panel, control chip and display panel - Google Patents
Control circuit and control method of display panel, control chip and display panel Download PDFInfo
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- CN118173036A CN118173036A CN202410498764.1A CN202410498764A CN118173036A CN 118173036 A CN118173036 A CN 118173036A CN 202410498764 A CN202410498764 A CN 202410498764A CN 118173036 A CN118173036 A CN 118173036A
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- 238000010586 diagram Methods 0.000 description 11
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 230000006872 improvement Effects 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 4
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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Abstract
The application provides a control circuit, a control method, a control chip and a display panel of the display panel; the control circuit comprises a control module, wherein the control module is arranged between the system board and the working module and is used for outputting a first control signal and/or a second control signal according to an input signal of the system board; the control module comprises a storage unit and an operation unit, wherein the storage unit is used for storing shutdown data, outputting a shutdown signal according to the shutdown data, receiving the shutdown signal and an input signal, and selectively outputting a first control signal and/or a second control signal after OR operation is carried out on the shutdown signal and the input signal; the application can realize the on-off control of different working units by only accessing one interface into the system board on the control circuit, thereby realizing the switching of different working modes.
Description
Technical Field
The application belongs to the technical field of display, and particularly relates to a control circuit and method of a display panel, a control chip and the display panel.
Background
The current display panel is provided with different shutdown modes, and the different shutdown modes correspond to different dormancy degrees of the display panel to a certain extent.
In the related art, the shutdown mode may be divided into an off mode, a standby mode, and a light load mode; the off mode is to completely turn off the power supply; the standby mode is to turn off most of the working modules under the condition that the power supply is not turned off; the light load mode refers to the condition that the power supply is not turned off, and a small part of the working modules are turned off.
At present, different interfaces are required to be arranged on a power management chip, and three different control signals output by a system board are received through the different interfaces to realize control of different shutdown modes; this results in the need to provide three response circuits in the power management chip for responding to three different control signals, which results in a complex circuit and thus a high design cost of the control circuit and the circuit board.
Therefore, how to reduce the complexity of the control circuit of the display panel is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The application aims to provide a control circuit, a control method, a control chip and a display panel of a display panel, and aims to solve the problem that the control circuit of the display panel in the prior art is high in complexity.
A first aspect of an embodiment of the present application provides a control circuit of a display panel, where the display panel includes a system board and a working module, the control circuit is configured to connect with the system board and the working module, the working module includes a first working unit and a second working unit, and the second working unit is configured to be started only when the first working unit is started; the control circuit includes:
The control module is arranged between the system board and the working module and is used for outputting a first control signal and/or a second control signal according to an input signal of the system board, wherein the first control signal is used for opening or closing the first working unit, and the second control signal is used for opening or closing the second working unit;
The control module comprises a storage unit and an operation unit, wherein the storage unit is used for storing shutdown data and outputting a shutdown signal according to the shutdown data, and the operation unit is used for receiving the shutdown signal and the input signal, and selectively outputting the first control signal and/or the second control signal after OR operation is carried out on the shutdown signal and the input signal.
In some embodiments of the application, the working module further comprises a third working unit configured to be activated only when the first working unit is activated;
The control module is used for outputting a third control signal to open or close the third working unit; the operation unit is configured to receive the shutdown signal and the input signal, and selectively output at least one of the first control signal, the second control signal, and the third control signal after performing an or operation on the shutdown signal and the input signal.
In some embodiments of the present application, the control circuit further includes a logic unit, where the logic unit is connected to the storage unit and is configured to write the shutdown data into the storage unit and to read the shutdown data.
In some embodiments of the present application, the logic unit is connected to the operation unit, and the logic unit is configured to receive at least one of the first control signal, the second control signal, and the third control signal, so as to perform control of the first working unit, the second working unit, and the third working unit.
In some embodiments of the present application, the shutdown signal includes the first mode signal, the second mode signal, and the third mode signal, the operation unit includes a first or operator, a second or operator, and a third or operation, and the second control signal includes a first sub-signal and a second sub-signal;
The first OR operator is used for receiving the first mode signal and the input signal, and outputting the first sub-signal after OR operation; the second OR operator is used for receiving the second mode signal and the input signal, and outputting the second sub-signal after OR operation; the third OR operator is used for receiving the third mode signal and the input signal, and outputting the third control signal after OR operation; the logic unit is configured to receive the first sub-signal, the second sub-signal, and the third control signal, so as to control the corresponding working unit to be turned off.
In some embodiments of the present application, the arithmetic unit further includes a fourth or arithmetic unit for outputting the first output signal according to the first sub-signal and the input signal, and a fifth or arithmetic unit for outputting a second output signal according to the first output signal and the input signal; wherein the second output signal is the first control signal.
In some embodiments of the present application, the operation unit further includes an not gate operator, and an input end of the not gate operator is configured to receive the first sub-signal, perform a non-operation on the first sub-signal, and output the first sub-signal to the fourth or operator.
In some embodiments of the present application, the arithmetic unit further includes a delay subunit disposed between the fourth or operator and the fifth or operator, and the delay subunit is connected to the logic unit and configured to control a transmission timing of the first output signal according to a state of the logic unit.
In some embodiments of the present application, the control circuit further includes a pull-up voltage output unit for turning off the first operation unit according to the first control signal.
In some embodiments of the present application, the pull-up voltage output unit is configured to obtain an input voltage value according to the first control signal, and to compare the input voltage value with a preset voltage value and then output a logic signal, where the logic unit starts to operate in response to the logic signal.
In a second aspect, the present application further provides a control method of a display panel, where the control method is applied to the control circuit, and the control method includes:
Acquiring the input signal and a shutdown signal;
and selectively outputting a first control signal and/or a second control signal according to the input signal and the shutdown signal so as to shut down the first working unit and/or the second working unit.
In a third aspect, the present application further provides a control chip, where the control circuit is integrated on the control chip.
In a fourth aspect, the present application further provides a display panel, including a system board, a working module, and the control chip described above.
Compared with the prior art, the embodiment of the application has the beneficial effects that: the control circuit, the control method, the control chip and the display panel of the display panel; the control circuit comprises a control module, wherein the control module is arranged between the system board and the working module, the control module is used for outputting a first control signal and/or a second control signal according to an input signal of the system board, the first control signal is used for opening or closing the first working unit, and the second control signal is used for opening or closing the second working unit; the control module comprises a storage unit and an operation unit, wherein the storage unit is used for storing shutdown data, outputting a shutdown signal according to the shutdown data, receiving the shutdown signal and an input signal, and selectively outputting a first control signal and/or a second control signal after OR operation is carried out on the shutdown signal and the input signal; the application can realize the on-off control of different working units by only accessing one interface into the system board on the control circuit, thereby realizing the switching of different working modes.
Drawings
Fig. 1 is a block diagram of a control circuit of a display panel according to an embodiment of the present application;
fig. 2 is a block diagram of a control circuit of a display panel according to another embodiment of the present application;
Fig. 3 is a block diagram of a control circuit of a display panel according to another embodiment of the present application;
FIG. 4 is a block diagram of a control circuit of a display panel according to another embodiment of the present application;
FIG. 5 is a block diagram illustrating a control circuit of a display panel according to another embodiment of the present application;
fig. 6 is a schematic diagram illustrating steps of a control method of a display panel according to an embodiment of the application.
Specific element symbol description: 100-system board, 200-control module, 210-storage unit, 220-operation unit, 300-working module, 310-first working unit, 320-second working unit, 330-third working unit, 400-logic unit.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or be 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 be indirectly connected to the other element.
It is to be understood that the terms "length," "width," "upper," "lower," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, and are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
It should be noted that, the current display panel technology is gradually changed, and in order to meet the diversified demands of users, the shutdown mode of the display panel is also gradually changed. These different shutdown modes not only provide more options for the user, but also determine to some extent the power consumption and performance of the display panel in the sleep state.
In particular, we can divide these shutdown modes into three major categories: an off mode, a standby mode and a light load mode. The off mode is the most thorough off state, and when the power supply of the display panel is completely turned off, all the working modules stop working, so that the lowest energy consumption state is achieved. However, this also means that a longer time is required at the time of restarting.
The standby mode is a state between full shutdown and normal operation. In this mode, most of the working modules are turned off to reduce power consumption, although the power supply is not turned off. When the device needs to be used again, the device can be quickly restored to a normal working state, so that the mode achieves a better balance between energy consumption and starting speed. The light load mode is a more flexible shutdown state. In this mode, the power supply remains on as well, but only a small part of the working modules are turned off. This means that the light load mode can relatively reduce the energy consumption while maintaining a certain response speed.
However, to achieve these different shutdown modes, the current solution is to provide different interfaces on the power management chip, each for receiving a different control signal output by the system board. This means that three different response circuits, each for responding to these control signals, need to be designed and integrated inside the power management chip. This not only increases the complexity of the circuit design, but also increases the production cost, which is detrimental to the market competitiveness of the product.
For the field of liquid crystal display panels, the control method of three working modes of the power management chip comprises the following steps: the turn-off mode is to directly turn off the input power of the power management chip of the liquid crystal display panel by using a switch control circuit at the power supply input end. Although the turn-off mode can achieve complete turn-off of the power management chip and meet the requirement that the quiescent current is less than 5uA, the method requires the use of a switch control circuit at a power supply input end. The circuit is composed of a PMOS and an NPN triode, the PMOS is turned off by a control signal provided by a system board, so that the input power supply of power supply management is cut off, and the method cannot be integrated into a power supply management chip. The standby mode is to use the SHDN control signal port of the power management chip, turn off other modules except VL of the power management chip through the standby control signal provided by the system board, let the power management chip enter the standby mode, the implementation mode needs the standby control signal port, the light load mode is to use the EN control port of the power management chip, turn off the Group B module output (Group B includes GATE DRIVER power supply on voltage, source IC analog power supply voltage AVDD, HAVDD, common electrode voltage VCOM) of the power management chip through the light load control signal provided by the system board, to realize the control of three shutdown modes, the current power management chip needs the system board to provide three different control signals, and needs to increase the input voltage switch circuit of the shutdown mode, the design is complex, and the cost is high.
The application is based on the improvement of the control circuit, the control method, the control chip and the display panel of the related display panel.
Referring to fig. 1, fig. 1 is a block diagram illustrating a control circuit of a display panel according to the present embodiment. In the control circuit of the display panel of the present embodiment, the display panel includes a system board 100 and a working module 300, the control circuit is used to connect with the system board 100 and the working module 300, the working module 300 includes a first working unit 310 and a second working unit 320, and the second working unit 320 is configured such that the second working unit 320 can be started only when the first working unit 310 is started.
The control circuit includes a control module 200, the control module 200 is disposed between the system board 100 and the working module 300, the control module 200 is configured to output a first control signal and/or a second control signal according to an input signal of the system board 100, the first control signal is configured to turn on or off the first working unit 310, and the second control signal is configured to turn on or off the second working unit 320; the control module 200 includes a storage unit 210 and an operation unit 220, the storage unit 210 is configured to store shutdown data, output a shutdown signal according to the shutdown data, and the operation unit 220 is configured to receive the shutdown signal and the input signal, and selectively output a first control signal and/or a second control signal after performing an or operation on the shutdown signal and the input signal.
It should be noted that the first working unit 310 may be a pull-up voltage output structure, and the second working unit 320 may be other voltage output structures. In the off mode, the first and second operating units 310 and 320 are turned off by outputting the first and second control signals; in the standby mode, the second control signal is output to turn off the second operating unit 320.
In the current control circuit of the display panel, a plurality of interfaces are required to receive different control signals output by the system board 100 to realize control of different shutdown modes, and different logic circuits are required to be arranged in the control circuit corresponding to different interfaces, so that the control circuit is complex and has high cost. However, in the present application, only one interface is needed to access the system board 100 on the control circuit, so that the on-off control of different working units can be realized, and the switching of different working modes can be further realized.
In some embodiments of the present application, referring to fig. 2, fig. 2 is a block diagram illustrating a control circuit of a display panel according to the present embodiment. The working module 300 of the present embodiment further includes a third working unit 330, where the third working unit 330 is configured such that the second working unit 320 can be started only when the first working unit 310 is started; the control module 200 is configured to output a third control signal to turn on or off the third working unit 330; the operation unit 220 is configured to receive the shutdown signal and the input signal, and selectively output at least one of the first control signal, the second control signal, and the third control signal after performing an or operation on the shutdown signal and the input signal.
It should be noted that the operation module 300 may be a portion for providing a required power supply voltage for display of the display panel, for example, the operation module 300 may provide a pull-up Voltage (VL), a logic power supply Voltage (VBK), an analog power supply voltage AVDD, a common voltage VCOM, a power supply turn-on voltage VGH, a turn-off voltage VGL, and the like. In this embodiment, when the off mode is required, the first control signal, the second control signal, and the third control signal are output, so that all the voltage output signals are turned off, that is, the pull-up voltage, the logic supply voltage, the analog supply voltage, the common voltage, the supply turn-on voltage, and the turn-off voltage are turned off. When the standby mode is needed, the second control signal and the third control signal are output, and all voltage output signals except the pull-up voltage are turned off. When the light load mode is needed, a third control signal is output, and all voltages except the pull-up voltage, the logic power supply voltage, the common electrode voltage and the turn-off voltage are only turned off.
It can be understood that the voltage required to be maintained according to different modes in the power management chip is classified to form different shutdown modes. In some embodiments, the turn-off mode requires all voltages to be turned off, and then the first control signal and the second control signal and the third control signal are required to output the turn-off signal at the same time; the standby mode needs to keep the pull-up voltage, and then needs the second control signal and the third control signal to output the turn-off signal at the same time; the light load mode needs to keep the pull-up voltage, the logic power supply voltage, the common electrode voltage and the turn-off voltage, and then needs the third control signal to output the turn-off signal to turn off the analog power supply voltage and the power supply turn-on voltage. It will be appreciated that all of the above voltages are required while maintaining output when the display panel is operating normally.
In some embodiments of the present application, referring to fig. 3, fig. 3 is a block diagram illustrating a control circuit of a display panel according to the present embodiment. The control circuit of the present embodiment further includes a logic unit 400, where the logic unit 400 is connected to the storage unit 210, and is used for writing the shutdown data into the storage unit 210, and for reading the shutdown data.
It should be noted that, the logic unit 400 can write the shutdown data into the storage unit 210, or can read the shutdown data currently stored from the storage unit 210. The shutdown data is used for representing which shutdown mode the display panel enters currently when shutdown. After the power management chip works, the logic unit 400 can read and write the storage unit 210, write the required shutdown mode, and read the current shutdown mode.
In some embodiments of the present application, referring to fig. 4, fig. 4 is a block diagram illustrating a control circuit of a display panel according to the present embodiment. The logic unit 400 of the present embodiment is connected to the operation unit 220, and the logic unit 400 is configured to receive at least one of the first control signal, the second control signal, and the third control signal to perform control on the first working unit 310, the second working unit 320, and the third working unit 330.
In some embodiments, logic unit 400 is a digital logic structure.
In some embodiments of the present application, referring to fig. 5, fig. 5 shows a block diagram of a control circuit of a display panel according to the present embodiment. The shutdown signal of the present embodiment includes a first mode signal, a second mode signal and a third mode signal, the operation unit 220 includes a first or operator, a second or operator and a third or operation, and the second control signal includes a first sub-signal and a second sub-signal; the first OR operator is used for receiving the first mode signal and the input signal, and outputting a first sub-signal after OR operation; the second OR operator is used for receiving the second mode signal and the input signal, and outputting a second sub-signal after OR operation; the third OR arithmetic unit is used for receiving the third mode signal and the input signal, and outputting a third control signal after OR arithmetic; the logic unit 400 is configured to receive the first sub-signal, the second sub-signal, and the third control signal to control the corresponding working unit to be turned off.
That is, as long as one of the input signal and the shutdown signal satisfies the shutdown requirement, the corresponding control signal is output to shut down the corresponding operation unit.
In some embodiments of the present application, the operation unit 220 further includes a fourth or operator and a fifth or operator, where the fourth operator is configured to output a first output signal according to the first sub-signal and the input signal, and the fifth or operator is configured to output a second output signal according to the first output signal and the input signal; the second output signal is the first control signal.
In some embodiments of the present application, please continue to refer to fig. 5, the operation unit 220 of the present embodiment further includes an not gate operator, wherein an input end of the not gate operator is configured to receive the first sub-signal, perform a non-operation on the first sub-signal, and output the first sub-signal to the fourth or operator.
In some embodiments of the present application, please continue to refer to fig. 5, the operation unit 220 of the present embodiment further includes a delay sub-unit, which is disposed between the fourth or operator and the fifth or operator, and is connected to the logic unit 400 and is used for controlling the transmission timing of the first output signal according to the state of the logic unit 400.
In some embodiments of the present application, please continue to refer to fig. 5, the control circuit of the present embodiment further includes a pull-up voltage output unit, which is configured to turn off the first operation unit 310 according to the first control signal.
In some embodiments of the present application, please continue to refer to fig. 5, the pull-up voltage output unit of the present embodiment is configured to obtain an input voltage value according to a first control signal, and to compare the input voltage value with a preset voltage value and then output a logic signal, and the logic unit 400 starts to operate in response to the logic signal.
In an embodiment of the present application, referring to fig. 5, VIN in fig. 5 is a power supply of a power management chip of a liquid crystal display panel, and en.pin is a composite enable input signal (corresponding to an input signal) of the power management chip. Vl_en is a pull-up voltage VL enable signal (corresponding to the second control signal), VL > uvlo_r_vl establishes a power supply signal for Digital logic (Digital, corresponding to the logic unit 400), vl_out is a power module output module, and simultaneously supplies power to logic inside the chip and external pull-up signal voltages, and the multiplexing function configuration storage module (corresponding to the storage unit 210) stores a state of which power management chip enters into which shutdown mode when shutdown.
VL & VBK Output is the pull-up voltage VL and the logic supply voltage VBK Output, only VL Output is the pull-up voltage VL Output turned off, ALL CHANNEL Control is the full channel Control Output, power Module is the Power supply Module, write is the Write, and Read is the Read.
After the power management chip works, the power management chip can read the current shutdown mode by reading and writing the required shutdown mode into the storage unit 210, and when receiving an input signal, the power management chip enables the power management chip to enter a shutdown mode, a standby mode or a light load mode according to the current stored shutdown mode.
Specifically, after the input voltage VIN is established, the system board 100 provides a power-on enable signal through the input signal, the pull-up voltage output unit enables and outputs the power-on enable signal, the digital logic of the power management chip reads the power-off mode configuration information in the storage unit 210, and selects the power-off mode under the current power-off signal, and when the system board 100 provides the power-off information through the input signal, the logic unit 400 controls the power management chip to output different power-off mode control signals according to the read power-off mode, so as to realize the power-off state of the power management chip in the power-off mode, the standby mode and the light-load mode.
When the input signal is a power-on signal, the pull-up voltage output unit will turn on the output, and at this time, if the input voltage of the pull-up voltage output unit is greater than the preset voltage (uvlo_r_vl), the power management chip will read the power-off data in the storage unit 210 again, and when the next power-off signal is confirmed, the power management chip enters which power-off mode, and the power-off mode in the storage unit 210 can be modified in real time through IIC communication of the power management chip, so as to implement an online setting function for the power-off mode.
Specifically, the control process is as follows, after the input voltage VIN is established, the system board 100 provides a power-on enabling signal for the power management chip through the input signal, and the pull-up voltage output unit enables and outputs the power-on enabling signal;
When the input voltage of the pull-up voltage output unit is greater than the preset voltage, the logic unit 400 reads the shutdown mode information (shutdown data) in the memory unit 210, and stores the shutdown mode information in the judgment logic of the chip.
When the power-off is needed, if the logic unit 400 reads the power-off signal from the storage unit 210 and determines that the power management chip is in the power-off mode, the system board 100 provides the power-off signal to the power management chip through the input signal, the power-off signal and the power-off mode are determined after the power-off signal and the power-off mode are calculated, the logic unit 400 controls the power-off mode to output the signal, controls the power supply module to turn off all output channels according to the internal time sequence, performs Delay calculation on the power-off signal, determines that all modules of the power management chip are turned off, finally controls the pull-up voltage output unit to turn off, and closes the VL_OUT output, and finally the power management chip works in the full power-off mode, and the static current of the chip is not more than 5uA.
When the power-off is required, the logic unit 400 reads the power-off signal from the storage unit 210 and determines that the power-off signal and the power-off mode are standby mode, the system board 100 provides the power-off signal for the power management chip through the input signal, the power-off signal and the power-off mode are calculated, the logic unit 400 determines that the power management chip enters the standby mode, the logic unit 400 controls the standby mode to output the signal, controls the power module to turn off other modules except the pull-up voltage output unit according to the internal time sequence, the power management chip enters the standby mode, and at the moment, the power management chip only has the pull-up voltage output unit to work, so that internal power supply logic can be provided for the power management chip, and pull-up holding level can be provided for the outside.
When the power-off is performed, the logic unit 400 reads the signal from the storage unit 210 to determine that the power-off mode is a light-load mode, the system board 100 provides the power-off signal to the power management chip through the input signal, and determines that the power management chip enters the light-load mode after the power-off signal and the power-off mode are calculated, the logic unit 400 controls the light-load mode to output the signal, controls the power module to turn off the Group B module (including AVDD, HAVDD, VCOM, VGH) according to the internal time sequence, and maintains the normal operation of the VL, VBK and XAO signals.
Further, in order to better implement the control circuit of the display panel in any embodiment, the present application further provides a control method of the display panel based on the control circuit, where the control method is applied to the control circuit, and the control method includes:
s100: acquiring an input signal and a shutdown signal; specifically, the logic unit 400 may write the corresponding shutdown data into the storage unit 210 according to the input signal, and the storage unit 210 outputs the shutdown signal according to the shutdown data.
S200: the first control signal and/or the second control signal is selectively outputted according to the input signal and the shutdown signal to shut down the first working unit 310 and/or the second working unit 320.
Further, in order to better implement the control circuit of the display panel in any embodiment, the application further provides a control chip based on the control circuit, and the control circuit is integrated on the control chip.
Further, in order to better implement the control chip in any of the above embodiments, the present application further provides a display panel including the system board 100, the working module 300, and the control chip.
In some embodiments, the display panel is a liquid crystal display panel.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
While the basic concepts have been described above, it will be apparent to those skilled in the art that the foregoing detailed disclosure is by way of example only and is not intended to be limiting. Although not explicitly described herein, various modifications, improvements and adaptations of the application may occur to one skilled in the art. Such modifications, improvements, and modifications are intended to be suggested within the present disclosure, and therefore, such modifications, improvements, and adaptations are intended to be within the spirit and scope of the exemplary embodiments of the present disclosure.
Meanwhile, the present application uses specific words to describe embodiments of the present application. Reference to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic is associated with at least one embodiment of the application. Thus, it should be emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various positions in this specification are not necessarily referring to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of the application may be combined as suitable.
Similarly, it should be noted that in order to simplify the description of the present disclosure and thereby aid in understanding one or more inventive embodiments, various features are sometimes grouped together in a single embodiment, figure, or description thereof. This method of disclosure does not imply that the subject application requires more features than are set forth in the claims. Indeed, less than all of the features of a single embodiment disclosed above.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (13)
1. A control circuit of a display panel, characterized in that the display panel comprises a system board and a working module, the control circuit being adapted to be connected to the system board and the working module, the working module comprising a first working unit and a second working unit, the second working unit being configured to be started only when the first working unit is started; the control circuit includes:
The control module is arranged between the system board and the working module and is used for outputting a first control signal and/or a second control signal according to an input signal of the system board, wherein the first control signal is used for opening or closing the first working unit, and the second control signal is used for opening or closing the second working unit;
The control module comprises a storage unit and an operation unit, wherein the storage unit is used for storing shutdown data and outputting a shutdown signal according to the shutdown data, and the operation unit is used for receiving the shutdown signal and the input signal, and selectively outputting the first control signal and/or the second control signal after OR operation is carried out on the shutdown signal and the input signal.
2. The control circuit of the display panel according to claim 1, wherein the operation module further includes a third operation unit configured to be started only when the first operation unit is started;
The control module is used for outputting a third control signal to open or close the third working unit; the operation unit is configured to receive the shutdown signal and the input signal, and selectively output at least one of the first control signal, the second control signal, and the third control signal after performing an or operation on the shutdown signal and the input signal.
3. The control circuit of a display panel according to claim 2, further comprising a logic unit connected to the memory unit and configured to write the shutdown data into the memory unit and to read the shutdown data.
4. The control circuit of the display panel according to claim 3, wherein the logic unit is connected to the operation unit, and the logic unit is configured to receive at least one of the first control signal, the second control signal, and the third control signal, so as to perform control of the first operation unit, the second operation unit, and the third operation unit.
5. The control circuit of a display panel according to claim 3, wherein the shutdown signal includes a first mode signal, a second mode signal, and a third mode signal, the operation unit includes a first or operator, a second or operator, and a third or operation, and the second control signal includes a first sub-signal and a second sub-signal;
The first OR operator is used for receiving the first mode signal and the input signal, and outputting the first sub-signal after OR operation; the second OR operator is used for receiving the second mode signal and the input signal, and outputting the second sub-signal after OR operation; the third OR operator is used for receiving the third mode signal and the input signal, and outputting the third control signal after OR operation; the logic unit is configured to receive the first sub-signal, the second sub-signal, and the third control signal, so as to control the corresponding working unit to be turned off.
6. The control circuit of the display panel according to claim 5, wherein the arithmetic unit further includes a fourth or arithmetic unit for outputting the first output signal according to the first sub-signal and the input signal, and a fifth or arithmetic unit for outputting a second output signal according to the first output signal and the input signal; wherein the second output signal is the first control signal.
7. The control circuit of claim 6, wherein the operation unit further comprises an not gate operator, and an input end of the not gate operator is configured to receive the first sub-signal, perform a non-operation on the first sub-signal, and output the first sub-signal to the fourth or operator.
8. The control circuit of a display panel according to claim 6, wherein the operation unit further comprises a delay sub-unit disposed between the fourth or operator and the fifth or operator, the delay sub-unit being connected to the logic unit and configured to control a timing of the transmission of the first output signal according to a state of the logic unit.
9. The control circuit of claim 6, further comprising a pull-up voltage output unit for turning off the first operation unit according to the first control signal.
10. The control circuit of the display panel according to claim 9, wherein the pull-up voltage output unit is configured to obtain an input voltage value according to the first control signal, and to output a logic signal after comparing the input voltage value with a preset voltage value, and the logic unit starts operating in response to the logic signal.
11. A control method of a display panel, characterized in that the control method is applied to the control circuit according to any one of claims 1 to 10, the control method comprising:
Acquiring the input signal and a shutdown signal;
and selectively outputting a first control signal and/or a second control signal according to the input signal and the shutdown signal so as to shut down the first working unit and/or the second working unit.
12. A control chip, characterized in that a control circuit according to any one of claims 1 to 10 is integrated on the control chip.
13. A display panel comprising a system board, a working module, and the control chip of claim 12.
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| CN202410498764.1A CN118173036B (en) | 2024-04-24 | 2024-04-24 | Control circuit and control method of display panel, control chip and display panel |
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| CN202410498764.1A CN118173036B (en) | 2024-04-24 | 2024-04-24 | Control circuit and control method of display panel, control chip and display panel |
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| CN118173036A true CN118173036A (en) | 2024-06-11 |
| CN118173036B CN118173036B (en) | 2024-09-06 |
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| US20110102411A1 (en) * | 2009-11-03 | 2011-05-05 | Mstar Semiconductor, Inc. | Low-Power Display Control Method and Associated Display Controller |
| CN103914123A (en) * | 2013-01-03 | 2014-07-09 | 广达电脑股份有限公司 | Computer device and power management method thereof |
| CN111930040A (en) * | 2020-08-04 | 2020-11-13 | 湖北亿咖通科技有限公司 | Control device and method for vehicle-mounted central control display screen |
| CN115378115A (en) * | 2022-08-31 | 2022-11-22 | 国民技术股份有限公司 | Multi-mode low-power-consumption power management system and integrated system on chip |
| CN116343713A (en) * | 2023-03-31 | 2023-06-27 | 昆山龙腾光电股份有限公司 | Identification display method of display device and display device |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110102411A1 (en) * | 2009-11-03 | 2011-05-05 | Mstar Semiconductor, Inc. | Low-Power Display Control Method and Associated Display Controller |
| CN103914123A (en) * | 2013-01-03 | 2014-07-09 | 广达电脑股份有限公司 | Computer device and power management method thereof |
| CN111930040A (en) * | 2020-08-04 | 2020-11-13 | 湖北亿咖通科技有限公司 | Control device and method for vehicle-mounted central control display screen |
| CN115378115A (en) * | 2022-08-31 | 2022-11-22 | 国民技术股份有限公司 | Multi-mode low-power-consumption power management system and integrated system on chip |
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| CN118173036B (en) | 2024-09-06 |
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