CN113920953B - Electrophoretic display device, control method, and computer-readable storage medium - Google Patents
Electrophoretic display device, control method, and computer-readable storage medium Download PDFInfo
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- CN113920953B CN113920953B CN202111350224.1A CN202111350224A CN113920953B CN 113920953 B CN113920953 B CN 113920953B CN 202111350224 A CN202111350224 A CN 202111350224A CN 113920953 B CN113920953 B CN 113920953B
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- 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
- G09G3/34—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 by control of light from an independent source
- G09G3/3433—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 by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
- G09G3/344—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 by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices
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Abstract
The embodiment of the disclosure provides an electrophoretic display device, which can avoid restarting the electrophoretic display device caused by the failure of starting an electrophoretic display panel. The electrophoretic display device includes: power module, treater, switch control circuit and electrophoresis display panel, wherein: the power supply module is used for supplying power to the processor and providing starting voltage for the electrophoresis display panel; the processor is used for detecting the monitoring voltage, and sending a first control signal to the switch control circuit when the monitoring voltage is equal to or lower than a preset fault voltage threshold value; the monitoring voltage comprises the output voltage of the power supply module or the input voltage of the electrophoresis display panel, and the preset fault voltage threshold value is higher than the fault voltage value; the switch control circuit is used for disconnecting the passage between the power supply module and the electrophoresis display panel according to the first control signal sent by the processor; the electrophoresis display panel is used for displaying. The running of the electrophoretic display device is more stable.
Description
Technical Field
Embodiments of the present disclosure relate to the field of displays, and more particularly, to an electrophoretic display (Electronic Paper Display, EPD) device, a control method, and a computer-readable storage medium.
Background
The electrophoretic display technology is a display technology which controls the distribution pattern of charged pigment particles through an electric field so as to change the reflectivity of a display area to ambient light to generate a display effect. The display device can be watched by using an ambient light source, has low power consumption, and is one of important technologies for developing electronic paper.
However, when a failure occurs during the EPD device start-up phase, it is generally attempted to repeatedly restart the EPD device until the EPD device start-up is successful. The device may also be caused to restart when a fault occurs during operation of the EPD device. If the device still cannot work after restarting, the device is frequently restarted, and cannot be processed at present.
Disclosure of Invention
The embodiment of the disclosure provides an EPD device, a control method and a computer readable storage medium, which can avoid restarting of an EPD device caused by failure of starting an EPD panel.
In one aspect, an embodiment of the present disclosure provides an EPD device including: power module, processor, switch control circuit and EPD panel, wherein:
the power module is used for supplying power to the processor and providing starting voltage for the EPD panel;
the processor is used for detecting the monitoring voltage, and sending a first control signal to the switch control circuit when the monitoring voltage is equal to or lower than a preset fault voltage threshold value; the monitoring voltage comprises the output voltage of the power supply module or the input voltage of the EPD panel, and the preset fault voltage threshold is higher than the fault voltage value;
the switch control circuit is used for disconnecting a passage between the power supply module and the EPD panel according to the first control signal sent by the processor;
the EPD panel is used for displaying.
On the other hand, the embodiment of the present disclosure further provides an EPD device control method, for the EPD device, including:
detecting a monitoring voltage, and judging whether the monitoring voltage is equal to or lower than a preset fault voltage threshold value; the monitoring voltage comprises the output voltage of the power supply module or the input voltage of the EPD panel, and the preset fault voltage threshold is higher than the fault voltage value;
and responding to the monitored voltage being lower than a preset fault voltage threshold, sending a first control signal to a switch control circuit, so that the switch control circuit cuts off a path between the power supply module and the EPD panel.
In still another aspect, the embodiments of the present disclosure further provide a computer readable storage medium storing a computer program executable on a processor, the computer program when executed by the processor being configured to implement the EPD device control method described above.
According to the method provided by the embodiment of the disclosure, the monitoring voltage is detected by the processor, when the monitoring voltage is found to possibly cause the processor to fail to work normally, the switch control circuit is controlled to disconnect the channel between the power module and the EPD panel, namely, the power supply of the EPD panel is closed, so that the problem that the whole EPD device is restarted due to failure in starting or failure in running of the EPD panel is fundamentally avoided, and the EPD device can be enabled to run more stably.
Of course, not all of the above-described advantages need be achieved simultaneously in practicing any one of the products or methods of the present disclosure. Additional features and advantages of the disclosure will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the disclosure. The objectives and other advantages of the disclosed embodiments may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the disclosed embodiments and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain, without limitation, the disclosed embodiments. The shapes and sizes of various components in the drawings are not to scale true, and are intended to be illustrative of the present disclosure.
Fig. 1 is a schematic structural diagram of an EPD device according to an embodiment of the present disclosure;
FIG. 2 is a flowchart of a method for controlling an EPD device according to an embodiment of the present disclosure;
fig. 3 is a schematic circuit diagram of an EPD device according to an application example of the present disclosure;
FIG. 4 is a control flow diagram of an example application of the present disclosure;
FIG. 5 is a schematic diagram of the power supply voltage at the time of a device start-up failure or restart failure according to an embodiment of the present disclosure;
fig. 6 is a circuit schematic diagram of another EPD device in an application example of the present disclosure.
Detailed Description
The present disclosure describes several embodiments, but the description is illustrative and not limiting, and it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible within the scope of the embodiments described in the present disclosure. Although many possible combinations of features are shown in the drawings and discussed in the embodiments, many other combinations of the disclosed features are possible. Any feature or element of any embodiment may be used in combination with or in place of any other feature or element of any other embodiment unless specifically limited.
The present disclosure includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements of the present disclosure that have been disclosed may also be combined with any conventional features or elements to form a unique inventive arrangement as defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other inventive arrangements to form another unique inventive arrangement as defined in the claims. Thus, it should be understood that any of the features shown and/or discussed in this disclosure may be implemented alone or in any suitable combination. Accordingly, the embodiments are not to be restricted except in light of the attached claims and their equivalents. Further, various modifications and changes may be made within the scope of the appended claims.
Furthermore, in describing representative embodiments, the specification may have presented the method and/or process as a particular sequence of steps. However, to the extent that the method or process does not rely on the particular order of steps set forth herein, the method or process should not be limited to the particular sequence of steps described. Other sequences of steps are possible as will be appreciated by those of ordinary skill in the art. Accordingly, the particular order of the steps set forth in the specification should not be construed as limitations on the claims. Furthermore, the claims directed to the method and/or process should not be limited to the performance of their steps in the order written, and one skilled in the art can readily appreciate that the sequences may be varied and still remain within the spirit and scope of the embodiments of the present disclosure.
Unless defined otherwise, technical or scientific terms used in this disclosure have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first," "second," and the like, as used in this disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. In this disclosure, "a plurality" may mean two or more than two numbers. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items.
In order to keep the following description of the embodiments of the present disclosure clear and concise, the present disclosure omits a detailed description of some known functions and known components. The drawings of the embodiments of the present disclosure relate only to the structures related to the embodiments of the present disclosure, and other structures may refer to the general design.
As described above, since the faults of the EPD device at the start-up and operation stage cannot be eliminated at present, only a restarting means can be adopted to ensure that the system program can still normally run downwards when the EPD device fails. However, the inventor of the present application found that, during the device start-up phase, the EPD device is restarted due to the EPD panel (EPD screen) start-up failure, which may cause the EPD device voltage to be unstable, thereby causing the EPD device restart failure. In the device operation stage, when the EPD screen causes the EPD device to restart for various reasons, the EPD voltage is in an unstable state, so that the EPD device is frequently restarted, and the restart also causes data loss in the processor, so that the EPD device cannot operate or is unstable in operation.
The inventor of the application finds that, when the EPD device fails, the power supply still works normally, but the normal operation of the whole circuit system is not supported, so that the power management system cannot solve the problem that the EPD device fails to start in the starting stage or the device frequently starts again in the running stage, but can be solved through active monitoring of the device system program. For this purpose, an EPD device is provided in an embodiment of the present application, as shown in fig. 1, including: comprises a power module 11, a processor 12, a switch control circuit 13 and an EPD panel 14, wherein:
a power module 11 for powering the processor 12 and for providing a starting voltage for the EPD panel 14;
a processor 12 for detecting a monitor voltage, and when the monitor voltage is equal to or lower than a preset fault voltage threshold, sending a first control signal to a switch control circuit; the monitoring voltage comprises the output voltage of the power module 11 or the input voltage of the EPD panel 14, and the preset fault voltage threshold is higher than the fault voltage value;
a switch control circuit 13 for disconnecting a path between the power module 11 and the EPD panel 14 according to the first control signal transmitted from the processor 12;
an EPD panel 14 for displaying.
According to the embodiment of the disclosure, the processor detects the monitoring voltage, when the monitoring voltage possibly causes that the processor cannot work normally, the control switch control circuit cuts off the passage between the power module and the EPD panel, namely, the power supply of the EPD panel is closed, so that the problem that the whole EPD device is restarted due to failure in starting or failure in running of the EPD panel in starting stage is fundamentally avoided, and the EPD device can run more stably.
The preset fault voltage threshold is a reference value for detecting whether the monitoring voltage will cause the equipment to malfunction, and is slightly higher than a voltage value (fault voltage value) when the malfunction is caused. When the fault voltage is reached, the normal operation of the whole circuit system is not enough, so that the preset fault voltage threshold value is required to be set to be larger than the fault voltage value, and the power supply of the EPD panel is cut off when the circuit system can still normally operate. The preset fault voltage threshold may be derived from experimental testing.
After the embodiment of the disclosure is implemented, the restarting times of the EPD equipment are reduced, and the starting success rate is high; and the data loss caused by restarting in the running process of the equipment can be avoided. By adopting the scheme, the refresh failure of the EPD panel can be actively monitored, and the defect that the program can not judge only by manually checking the screen condition in the past is overcome. When the fault is detected through the scheme of the embodiment, the power supply is turned off first, and then remedial measures for refreshing the EPD panel (screen brushing) are taken, so that the success rate of screen brushing can be greatly improved, and restarting of the EPD device is avoided.
In an exemplary embodiment, the processor 12 may be further configured to report, early warning, and possibly fail, when the monitored voltage is equal to or lower than a preset failure voltage threshold.
In an exemplary embodiment, the processor 12 is further operable to issue a second control signal to the switch control circuit when the monitored voltage is detected to be above a preset fault voltage threshold; the switch control circuit 13 may be further configured to conduct a path between the power module 11 and the EPD panel 14 according to the second control signal sent by the processor 12.
In an exemplary embodiment, the processor is a micro control unit (Microcontroller Unit, abbreviated as MCU) and transmits a first control signal to the switch control circuit through an output pin epd_en.
In an exemplary embodiment, the switch control circuit includes a first switching device, a first pole of the first switching device is connected to an input/output (IO) pin of the processor 12, a second pole of the first switching device is connected to an output end of the power module 11, a third pole of the first switching device is connected to an input end of the EPD panel 14, the first pole of the first switching device receives a first control signal or a second control signal sent by the processor 12, a connection between the second pole and the third pole of the switching device is turned off according to the first control signal, and a connection between the second pole and the third pole of the first switching device is turned on according to the second control signal.
Optionally, a first pole of the first switching device is connected to an Input Output (IO) pin epd_en (EPD enable) of the processor 12.
In an exemplary embodiment, the EPD device further includes a voltage stabilizing module, the switching control circuit includes a second switching device and a third switching device, a first pole of the second switching device is connected to an input/output pin (e.g., epd_en pin) of the processor 12, a second pole of the second switching device is connected to an output terminal of the voltage stabilizing module, a third pole of the second switching device is connected to an input terminal of the EPD panel 14, a first pole of the third switching device is connected to an input/output pin of the processor 12, a second pole of the third switching device is connected to an output terminal of the power module 11, and a third pole of the third switching device is connected to an input terminal of the voltage stabilizing module. The first pole of the second switching device receives the first control signal or the second control signal sent by the processor 12, and turns off the connection between the second pole and the third pole of the second switching device according to the first control signal, and turns on the connection between the second pole and the third pole of the second switching device according to the second control signal. The second switching device is located in a circuit where the EPD panel is located and is used for switching on or switching off a path between the voltage stabilizing module and the EPD panel. The first pole of the third switching device receives the first control signal or the second control signal sent by the processor 12, and turns off the connection between the second pole and the third pole of the third switching device according to the first control signal, and turns on the connection between the second pole and the third pole of the third switching device according to the second control signal. The third switching device is located in a circuit where the voltage stabilizing module is located and is used for switching on or switching off a passage between the power supply module and the voltage stabilizing module.
In an exemplary embodiment, only one of the second switching device and the third switching device may be turned off, for example, only the second switching device between the voltage stabilizing module and the EPD panel may be turned off, because the voltage stabilizing module output may also be connected to other functional modules, and turning off the second switching device may achieve only cutting off the power of the EPD screen, thereby avoiding the other functional modules from being affected.
In an exemplary embodiment, the switching device may be a transistor including at least three terminal elements of a gate electrode, a drain electrode, and a source electrode. The transistor has a channel region between a drain electrode (a drain electrode terminal, a drain region, or a drain electrode) and a source electrode (a source electrode terminal, a source region, or a source electrode), and a current can flow through the drain electrode, the channel region, and the source electrode. In this specification, the first electrode may be a gate electrode, the second electrode may be a drain electrode, the third electrode may be a source electrode, or the second electrode may be a source electrode, and the third electrode may be a drain electrode. In addition to using transistors as switching devices, in other embodiments, other known circuits may be used as the switch control circuit.
In an exemplary embodiment, the processor starts to detect the monitor voltage during the initialization process, and ensures that the EPD device is protected during start-up. The processor is further configured to send a first control signal to a switch control circuit (the first switching device or the second switching device) at a starting stage of the EPD device, disconnect a path between the EPD panel and the power module, send a second control signal to the switch control circuit (the first switching device or the second switching device) after starting other functional modules in the EPD device, and connect the EPD panel and the power module. The probability of start failure can be reduced by starting other functional modules first and starting the EPD panel last.
In an exemplary embodiment, the EPD device may further include one or more functional modules, and the switch control circuit includes one or more fourth switching devices, each corresponding to one or more functional modules, for example, when one fourth switching device is connected to one functional module, the fourth switching device corresponds to the functional module. A fourth switching device may be connected to the plurality of functional modules, corresponding to the plurality of functional modules of the fourth switching device;
the processor is further configured to send a first control signal to the fourth switching device;
the fourth switching device is used for cutting off the passage between the power supply module and the functional module corresponding to the fourth switching device according to the first control signal sent by the processor.
Correspondingly, the processor is further configured to send a second control signal to a fourth switching device, where the fourth switching device is configured to switch on a path between the power module and a functional module corresponding to the fourth switching device according to the second control signal sent by the processor. The power consumption of the EPD device may be reduced by cutting off the power to other unnecessary functional modules.
The embodiment of the disclosure further provides a control method suitable for the EPD device shown in fig. 1, as shown in fig. 2, including the following steps:
step 21, detecting a monitoring voltage and judging whether the monitoring voltage is equal to or lower than a preset fault voltage threshold value;
the monitoring voltage comprises the output voltage of the power module 11 or the input voltage of the EPD panel 14, and the preset fault voltage threshold is higher than the fault voltage value;
optionally, the processor may begin executing step 21 above upon initialization of the processor during the EPD device startup phase.
In step 22, in response to the monitored voltage being lower than a preset fault voltage threshold, a first control signal is sent to the switch control circuit 13, so that the switch control circuit 13 breaks the path between the power module 11 and the EPD panel 14.
In an exemplary embodiment, the method further comprises: and in response to the monitored voltage being higher than a preset fault voltage threshold, sending a second control signal to the switch control circuit 13, so that the switch control circuit 13 opens a path between the power supply module 11 and the EPD panel 14.
In an exemplary embodiment, the detecting the monitor voltage includes: in the starting stage, the Micro Control Unit (MCU) starts the detection of the monitoring voltage in the initialization process. The monitoring function can be started when the device is started, and the device is protected.
In an exemplary embodiment, when the switching control circuit includes one first switching device between the EPD panel and the power module, the processor transmits the first control signal or the second control signal to the first switching device. When the EPD device further includes a voltage stabilizing module, the switching control circuit includes a second switching device between the EPD panel and the voltage stabilizing module and a third switching device between the power module and the voltage stabilizing module, and at this time, the processor may transmit only the first control signal or the second control signal to the second switching device. Control over the EPD panel leg is achieved.
In an exemplary embodiment, the method further comprises: in the start-up stage of the EPD device, a first control signal is sent to a switch control circuit (the first switch device or the second switch device) to turn off the power supply of the EPD panel, and after the start-up of other modules in the EPD device is completed, a second control signal is sent to the switch control circuit (the first switch device or the second switch device) to turn on the connection between the EPD panel and the power supply module. The probability of start failure can be reduced by starting the other modules first and starting the EPD panel last.
The present disclosure is described below by way of exemplary embodiments.
Fig. 3 is a circuit diagram of an EPD device, in which a lithium-manganese battery is the power module 11, an mcu (micro control unit) is the processor 12, and an e-ink is an EPD panel (EPD screen). In the figure, DC-DC is a voltage stabilizing module. In this example, the switch control circuit 13 may include only the switching device 1, or the switch control circuit 13 may include the switching device 1 and the switching device 2. When the switching control circuit 13 includes the switching device 1 and the switching device 2, when detecting that the monitor voltage is lower than the preset failure voltage threshold value, the first control signal may be sent to the switching device 1 and the switching device 2, respectively, to turn off both the switching device 1 and the switching device 2, or the first control signal may be sent only to the switching device 1 to turn off the switching device 1.
The control flow is as shown in fig. 4, and includes the following steps:
step 41, the epd device is activated;
step 42, monitoring the power supply voltage V1;
step 43, judging whether the power supply voltage V1 is smaller than a preset fault voltage threshold V2, if yes, executing step 44, and if not, executing step 45;
fig. 5 is a schematic diagram of the power supply voltage at the time of the equipment start failure or restart failure, and the relationship between the failure voltage value V1 and the preset failure voltage threshold V2 is shown in the figure. The fault voltage threshold V2 is slightly higher than the fault voltage value V1. The fault voltage threshold V2 may be derived from experimental tests.
Step 44, closing E-Ink, and executing step 46;
the MCU controls the switching device 1 to actively disconnect the power supply of the EPD screen through the IO pin EPD_EN, so that the power supply can be ensured to be supplied to the MCU for work preferentially, and the restarting of the whole EPD equipment is avoided. After the E-Ink is closed, the MCU can report the fault condition, and then the E-Ink is brushed, so that the starting success rate is improved.
Step 45, starting E-Ink, and executing step 46;
in step 46, the device continues to perform other tasks, and the screen may be refreshed again as needed, returning to step 42.
When the power voltage V1 stabilizes, an attempt is made to refresh the EPD screen.
In another example, as shown in fig. 6, other functional modules, such as one or more of the following functional modules, may also be included in the EPD device: word stock chip, memory module (Flash in fig. 6), wireless communication module (SX 1278 in fig. 6). A switching device (the aforementioned fourth switching device) may be provided between each functional module and the power supply module, as the switching device 3 and the switching device 4 in the drawing. The switching control circuit between other functional modules and the processor is added, so that branch control can be better realized, and the switching devices corresponding to the functional modules are disconnected when the corresponding functional modules are not required to be accessed, so that low power consumption is realized.
It should be noted that the voltage values and the current values shown in fig. 4 and 6 are only examples, and are not meant to limit the application, and other values may be used in other embodiments.
In the example, the switching device is added to enable the device to independently control power supply of different peripheral devices, and in the example, the power supply of the EPD electronic paper screen is controlled through the IO pin EPD_EN of the MCU, so that the power supply control of the branch circuit is realized.
In an exemplary embodiment, during the initialization process of the MCU of the device, the real-time monitoring of the power supply voltage V1 is preferentially turned on, then other peripherals are turned on, and finally the EPD screen is refreshed. The monitoring function can be guaranteed to be started at the position indicated by the arrow in fig. 5, the equipment is protected, and the refreshing success rate can be improved by refreshing the EPD screen finally.
In the exemplary embodiment, whether the EPD display screen is operating normally or not can also be judged by directly monitoring the current consumed by the EPD display screen (which can be realized by monitoring the input voltage of the EPD display screen), whether the normal operation of the CPU is affected or not is indirectly judged by whether the excessive current occurs, and whether the EPD display screen is refreshed normally or not can be directly judged by this mode.
Products that the EPD devices described herein can use include, but are not limited to: electronic books, electronic price tags, electronic conference table cards, electronic chest cards, and the like using EPD display screens.
In an exemplary embodiment, the disclosed embodiments also provide a non-transitory computer readable storage medium having stored thereon a computer program executable on a processor, which when executed by the processor, implements the steps of the aforementioned control method.
Those of ordinary skill in the art will appreciate that all or some of the steps, systems, functional modules/units in the apparatus, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between the functional modules/units mentioned in the above description is not a fraction; for example, one physical component may have multiple functions, or one function or step may be performed cooperatively by several physical components. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.
While the embodiments disclosed in the present disclosure are described above, the embodiments are only employed for facilitating understanding of the present disclosure, and are not intended to limit the present disclosure. Any person skilled in the art to which this disclosure pertains will appreciate that numerous modifications and changes in form and details can be made without departing from the spirit and scope of the disclosure, but the scope of the disclosure is to be determined by the appended claims.
Claims (10)
1. An electrophoretic display device, comprising: power module, steady voltage module, treater, switch control circuit and electrophoresis display panel, wherein:
the power supply module is used for supplying power to the processor and providing starting voltage for the electrophoresis display panel;
the processor is used for detecting the monitoring voltage, and sending a first control signal to the switch control circuit when the monitoring voltage is equal to or lower than a preset fault voltage threshold value; the monitoring voltage comprises the output voltage of the power supply module or the input voltage of the electrophoresis display panel, and the preset fault voltage threshold value is higher than the fault voltage value;
the switch control circuit is used for disconnecting the passage between the power supply module and the electrophoresis display panel according to the first control signal sent by the processor, ensuring that the power supply preferentially supplies the processor to work, and avoiding restarting the electrophoresis display device; the switch control circuit comprises a second switch device and a third switch device, wherein the second switch device is used for switching on or off a passage between the voltage stabilizing module and the electrophoresis display panel, and the third switch device is used for switching on or off a passage between the power supply module and the voltage stabilizing module;
the electrophoresis display panel is used for displaying.
2. An electrophoretic display device according to claim 1, wherein,
the processor is further used for sending a second control signal to the switch control circuit when the monitored voltage is detected to be higher than a preset fault voltage threshold value;
the switch control circuit is also used for conducting a passage between the power supply module and the electrophoresis display panel according to a second control signal sent by the processor.
3. An electrophoretic display device according to claim 1, wherein,
the processor is further configured to send a first control signal to the switch control circuit at a start-up stage of the electrophoretic display device, disconnect a path between the electrophoretic display panel and the power module, send a second control signal to the switch control circuit after starting up other modules in the electrophoretic display device, and connect the electrophoretic display panel and the power module.
4. An electrophoretic display device according to any of claims 1-3, wherein,
the switch control circuit comprises a first switch device, a first pole of the first switch device is connected with the input and output pins of the processor, a second pole of the first switch device is connected with the output end of the power supply module, and a third pole of the first switch device is connected with the input end of the electrophoresis display panel.
5. An electrophoretic display device according to any of claims 1-3, further comprising a voltage stabilizing module;
the switch control circuit comprises a second switch device and a third switch device, wherein a first pole of the second switch device is connected with an input and output pin of the processor, a second pole of the second switch device is connected with an output end of the voltage stabilizing module, a third pole of the second switch device is connected with an input end of the electrophoresis display panel, a first pole of the third switch device is connected with an input and output pin of the processor, a second pole of the third switch device is connected with an output end of the power module, and a third pole of the third switch device is connected with an input end of the voltage stabilizing module.
6. An electrophoretic display device according to any one of claims 1-3, further comprising one or more functional modules, the switch control circuit comprising one or more fourth switching devices, each fourth switching device corresponding to one or more functional modules;
the processor is further configured to send a first control signal to the fourth switching device;
the fourth switching device is used for cutting off the passage between the power supply module and the functional module corresponding to the fourth switching device according to the first control signal sent by the processor.
7. A control method for an electrophoretic display device according to any one of claims 1 to 6, comprising:
detecting a monitoring voltage, and judging whether the monitoring voltage is equal to or lower than a preset fault voltage threshold value; the monitoring voltage comprises the output voltage of the power supply module or the input voltage of the electrophoresis display panel, and the preset fault voltage threshold value is higher than the fault voltage value;
and responding to the monitoring voltage being lower than a preset fault voltage threshold, sending a first control signal or a second control signal to a second switching device in the switching control circuit, so that the switching control circuit cuts off a passage between the power supply module and the electrophoresis display panel, ensuring that a power supply is preferentially supplied to the processor to work, and avoiding restarting the electrophoresis display device.
8. The method of controlling an electrophoretic display device according to claim 7, wherein the method further comprises:
and responding to the monitoring voltage being higher than a preset fault voltage threshold value, sending a second control signal to a switch control circuit, so that the switch control circuit opens a passage between the power supply module and the electrophoresis display panel.
9. The method for controlling an electrophoretic display device according to claim 7, wherein,
the method further comprises the steps of: and in the starting stage of the electrophoretic display device, a first control signal is sent to a switch control circuit, a passage between the electrophoretic display panel and the power supply module is disconnected, and after starting of other modules in the electrophoretic display device is completed, a second control signal is sent to the switch control circuit, so that connection between the electrophoretic display panel and the power supply module is connected.
10. A computer-readable storage medium, having stored thereon a computer program executable on a processor, which computer program, when executed by the processor, implements the steps of the method of controlling an electrophoretic display device according to any of claims 7-9.
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