CN112992032B - Control circuit, display device and control method - Google Patents
Control circuit, display device and control method Download PDFInfo
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- CN112992032B CN112992032B CN201911311925.7A CN201911311925A CN112992032B CN 112992032 B CN112992032 B CN 112992032B CN 201911311925 A CN201911311925 A CN 201911311925A CN 112992032 B CN112992032 B CN 112992032B
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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
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Abstract
The invention provides a control circuit, a display device and a control method, wherein the control circuit comprises: the device comprises a first power supply control circuit, a second power supply control circuit, a switch, a control module and a photosensitive sensor; the switch is respectively connected with the power supply, the first power supply control circuit, the second power supply control circuit and the control module; the photosensitive sensor is respectively connected with the first power supply control circuit and the control module; the second power supply control circuit and the control module are also connected with the display module; and the control module is configured to control the switch to be switched on and switched off, and when the illumination intensity detected by the photosensitive sensor is less than or equal to the preset illumination intensity, the control power supply supplies power to the display module through the second power supply control circuit to drive the display module to refresh. Compared with the control circuit in the prior art, the electronic paper screen refreshing circuit is simple in circuit, low in development cost, free of manual intervention, capable of automatically refreshing the electronic paper screen, free of continuous work of the control circuit and low in power consumption.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a control circuit, a display device, and a control method.
Background
Electronic paper, also called digital paper, is an ultra-thin and ultra-light display screen, i.e. a thin, flexible, erasable display as paper. The display has the advantages of paper (like visual perception almost completely like paper), can continuously convert and refresh the display content like a common liquid crystal display, and saves much power compared with the liquid crystal display.
However, the electronic paper screen has a problem that the color becomes light when the electronic paper screen is placed for a long time, and the display is affected. In the prior art, after the color of the electronic paper is lightened, refreshing is usually performed through manual pressing, and refreshing is performed through setting fixed time by adopting a clock chip or refreshing in a wireless communication mode and the like. The manual key refreshing needs human intervention to influence user experience, the clock chip is adopted to set fixed time refreshing and needs to continuously supply power to the clock chip, power consumption is high, and the wireless communication technology refreshing has the problems of high realization difficulty and high development cost.
Disclosure of Invention
The invention provides a control circuit to solve at least one problem of the electronic paper screen in the refreshing process.
In order to solve the above problem, an aspect of the present invention discloses a control circuit, including: the device comprises a first power supply control circuit, a second power supply control circuit, a switch, a control module and a photosensitive sensor;
the switch is respectively connected with the power supply, the first power supply control circuit, the second power supply control circuit and the control module;
the photosensitive sensor is respectively connected with the first power supply control circuit and the control module;
the second power supply control circuit and the control module are also connected with the display module;
the control module is configured to control the switch to be switched on and switched off, and when the illumination intensity detected by the photosensitive sensor is smaller than or equal to a preset illumination intensity, the power supply is controlled to supply power to the display module through the second power supply control circuit to drive the display module to refresh.
Optionally, the switch comprises: a first MOS switch and a second MOS switch;
the first MOS switch is respectively connected with the power supply, the first power supply control circuit and the control module;
the second MOS switch is respectively connected with the power supply, the second power supply control circuit and the control module.
Optionally, the control module is configured to control the switch to disconnect the power supply from the first power supply control circuit and the power supply from the second power supply control circuit in a sleep mode.
Optionally, in a working mode, the control module controls the first MOS switch to be turned on, so that the power supply supplies power to the photosensitive sensor through the first power supply control circuit, and the control module controls the photosensitive sensor to acquire the illumination intensity.
Optionally, when the illumination intensity is less than or equal to a preset illumination intensity, the control module controls the second MOS switch to be turned on, so that the power supply supplies power to the display module through the second power supply control circuit, and the control module controls the display module to refresh.
A second aspect of the invention provides a display device, which includes a power supply, a display module, and the control circuit described in any one of the above.
A third aspect of the present invention provides a control method applied to the control circuit described in any one of the above, the method including:
in a working mode, the control module controls the switch to be switched on, so that the power supply supplies power to the photosensitive sensor through the first power supply control circuit;
the control module obtains the illumination intensity detected by the photosensitive sensor;
when the illumination intensity is smaller than or equal to the preset illumination intensity, the control module controls the switch to be turned on, so that the power supply supplies power to the display module through the second power supply control circuit, and the display module is refreshed.
Optionally, in the operating mode, the control module controls the switch to be turned on, so that the power supply supplies power to the photosensitive sensor through the first power supply control circuit, and includes:
in a working mode, the control module controls the first MOS switch to be switched on, so that the power supply supplies power to the photosensitive sensor through the first power supply control circuit.
Optionally, when the illumination intensity is less than or equal to a preset illumination intensity, the control module controls the switch to be turned on, so that the power supply supplies power to the display module through the second power supply control circuit, so that the display module is refreshed, including:
when the illumination intensity is smaller than or equal to the preset illumination intensity, the control module controls the second MOS switch to be turned on, so that the power supply supplies power to the display module through the second power supply control circuit, and the display module is refreshed.
Optionally, the method further comprises:
after the display module is refreshed, switching back to the sleep mode;
in a sleep mode, the control module controls the switch to be switched off, so that the power supply stops supplying power to the photosensitive sensor and the display module.
Compared with the prior art, the invention has the following advantages:
the control circuit of the present invention includes: the device comprises a first power supply control circuit, a second power supply control circuit, a switch, a control module and a photosensitive sensor; the switch is respectively connected with the power supply, the first power supply control circuit, the second power supply control circuit and the control module; the photosensitive sensor is respectively connected with the first power supply control circuit and the control module; the second power supply control circuit and the control module are also connected with the display module; the control module is configured to control the switch to be switched on and switched off, and when the illumination intensity detected by the photosensitive sensor is smaller than or equal to a preset illumination intensity, the power supply is controlled to supply power to the display module through the second power supply control circuit to drive the display module to refresh. Compared with the control circuit in the prior art, the electronic paper screen refreshing circuit is simple in circuit, low in development cost, free of manual intervention, capable of automatically refreshing the electronic paper screen, free of continuous work of the control circuit and low in power consumption.
Drawings
FIG. 1 is a schematic diagram of a control circuit according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a display device according to a first embodiment of the present invention;
FIG. 3 is a flow chart illustrating steps of a control method according to a first embodiment of the present invention;
fig. 4 is a flowchart illustrating steps of another control method according to a first embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example one
Referring to fig. 1, a circuit diagram of a control circuit according to a first embodiment of the present invention is shown. One aspect of the present invention discloses a control circuit, comprising: the device comprises a first power supply control circuit, a second power supply control circuit, a switch Q, a control module MCU and a photosensitive sensor;
the switch Q is respectively connected with the power supply P, the first power supply control circuit, the second power supply control circuit and the control module MCU;
the photosensitive sensor is respectively connected with the first power supply control circuit and the control module MCU;
the second power supply control circuit and the control module MCU are also connected with a display module EPD;
the control module MCU is configured to control the switch Q to be opened or closed, and when the illumination intensity detected by the photosensitive sensor is smaller than or equal to a preset illumination intensity, the control module MCU controls the power supply P to supply power to the display module EPD through the second power supply control circuit to drive the display module EPD to refresh.
In an embodiment of the present invention, a display module includes: an electronic paper screen. The control circuit provided by the embodiment of the invention is used for controlling the refreshing of the electronic paper screen.
In an embodiment of the present invention, the switch Q includes: a first MOS switch Q1 and a second MOS switch Q2;
the first MOS switch Q1 is respectively connected with the power supply P, the first power supply control circuit and the control module MCU;
and the second MOS switch Q2 is respectively connected with the power supply P, the second power supply control circuit and the control module MCU.
In the embodiment of the invention, a control module MCU is always connected with a power supply P and is provided with a sleep mode and a working mode; wherein the sleep mode and the working mode are alternately performed; for example, the sleep mode is set to 1 minute, then the operation mode is performed, the operation mode is 2 seconds, and then the sleep mode is continuously entered.
The MCU does not work in the sleep mode, so that power consumption is avoided, and the loss of electric quantity can be reduced. Specifically, the time of the sleep mode and the operation mode may be set according to specific needs, and is not limited herein.
In the embodiment of the invention, the control module MCU is respectively connected with the first MOS switch Q1 and the second MOS switch Q2 and is used for controlling the opening and closing of the first MOS switch Q1 and the second MOS switch Q2, and when the control module MCU controls the opening of the first MOS switch Q1, the power supply P supplies power to the photosensitive sensor through the first power supply control circuit; when the control module MCU controls the first MOS switch Q1 to be closed, the power supply P stops supplying power to the photosensitive sensor; when the control module MCU controls the second MOS switch Q2 to be switched on, the power supply P supplies power to the display module EPD through the second power supply control circuit; when the control module MCU controls the second MOS switch Q2 to be closed, the power supply P stops supplying power to the display module EPD.
In the embodiment of the invention, the control module MCU is also respectively connected with the photosensitive sensor and the display module EPD, and the control module MCU is used for controlling the photosensitive sensor to detect the illumination intensity and controlling the display module EPD to refresh.
In the embodiment of the present invention, referring to fig. 1, the control module MCU may be connected to the first MOS switch through a line X and connected to the second MOS switch through a line Y.
In this embodiment of the present invention, the control module MCU is configured to control the switch Q to disconnect the connection between the power supply P and the first power supply control circuit and the connection between the power supply P and the second power supply control circuit in a sleep mode.
In the embodiment of the invention, the control circuit does not work in the sleep mode, so that the power consumption is not needed, and the loss of the electric quantity is reduced.
In the embodiment of the invention, in a working mode, the control module controls the first MOS switch Q1 to be turned on, so that the power supply P supplies power to the photosensitive sensor through the first power supply control circuit, and the control module MCU controls the photosensitive sensor to acquire illumination intensity.
In the embodiment of the present invention, when the illumination intensity is less than or equal to the preset illumination intensity, the control module MCU controls the second MOS switch Q2 to be turned on, so that the power supply P supplies power to the display module EPD through the second power control circuit, and the control module MCU controls the display module EPD to refresh.
In the embodiment of the invention, the power supply supplies power to the photosensitive sensor only in the working mode, and the power supply refreshes the display module only when the illumination intensity is low, so that the power supply is not required to be continuously supplied to each component in the control circuit, and the loss of electric quantity is reduced.
In the embodiment of the invention, the preset illumination intensity can be set according to actual needs, and generally speaking, at night or when the ambient illumination is dark, the electronic paper screen is not used, so that the display module EPD is refreshed at this stage, the use of a user is not influenced, and the use experience of the user is improved.
A second aspect of the present invention is to provide a display device, which includes a power supply P, a display module EPD, and the control circuit described in any one of the above embodiments.
Referring to fig. 2, in an embodiment of the present invention, a photosensor is disposed on a housing of an electronic screen.
Compared with the prior art, the invention has the following advantages:
the control circuit of the present invention includes: the device comprises a first power supply control circuit, a second power supply control circuit, a switch, a control module and a photosensitive sensor; the switch is respectively connected with the power supply, the first power supply control circuit, the second power supply control circuit and the control module; the photosensitive sensor is respectively connected with the first power supply control circuit and the control module; the second power supply control circuit and the control module are also connected with the display module; the control module is configured to control the switch to be switched on and switched off, and when the illumination intensity detected by the photosensitive sensor is smaller than or equal to a preset illumination intensity, the power supply is controlled to supply power to the display module through the second power supply control circuit to drive the display module to refresh. Compared with the control circuit in the prior art, the electronic paper screen refreshing circuit is simple in circuit, low in development cost, free of manual intervention, capable of automatically refreshing the electronic paper screen, free of continuous work of the control circuit and low in power consumption.
Example two
Referring to fig. 3, a flowchart illustrating steps of a control method according to an embodiment of the present invention is applied to a control circuit according to any one of the embodiments, where the method includes:
In the embodiment of the invention, the photosensitive sensor is powered only in the working mode so as to avoid the loss of electric quantity.
In the embodiment of the invention, after the photosensitive sensor is powered on, the control module controls the photosensitive sensor to work and starts to detect the illumination intensity of the current environment.
In the embodiment of the invention, the preset illumination intensity can be set according to actual needs, and generally speaking, at night or when the ambient illumination is dark, the electronic paper screen is not used, so that the display module EPD is refreshed at this stage, the use of a user is not influenced, and the use experience of the user is improved.
In this embodiment of the present invention, in the operating mode, the controlling module controls the switch to be turned on, so that the power supply supplies power to the photosensitive sensor through the first power supply control circuit, including:
in a working mode, the control module controls the first MOS switch to be switched on, so that the power supply supplies power to the photosensitive sensor through the first power supply control circuit.
In this embodiment of the present invention, when the illumination intensity is less than or equal to a preset illumination intensity, the control module controls the switch to be turned on, so that the power supply supplies power to the display module through the second power control circuit, so as to refresh the display module, including:
when the illumination intensity is smaller than or equal to the preset illumination intensity, the control module controls the second MOS switch to be turned on, so that the power supply supplies power to the display module through the second power supply control circuit, and the display module is refreshed.
In the embodiment of the present invention, the method further includes:
after the display module is refreshed, switching back to the sleep mode;
in a sleep mode, the control module controls the switch to be switched off, so that the power supply stops supplying power to the photosensitive sensor and the display module.
In the embodiment of the present invention, after the sleep mode is ended, the operation mode is switched back, and in the operation mode, the step 201 is continuously executed.
In this embodiment of the present invention, in the operating mode, before the control module controls the switch to be turned on to enable the power supply to supply power to the photosensitive sensor through the first power supply control circuit, the method further includes:
initializing the control module, and initializing the illumination intensity zone bit to be zero and the display module updating zone bit to be zero;
when the illumination intensity is less than or equal to a preset illumination intensity, the control module controls the switch to be turned on, so that the power supply supplies power to the display module through the second power supply control circuit, so as to refresh the display module, including:
when the current illumination intensity is smaller than or equal to the preset illumination intensity, the illumination intensity flag bit is recorded to be 1, and the control module controls the switch to be switched on, so that the power supply supplies power to the display module through the second power supply control circuit, and the display module is refreshed.
After control module control the display module assembly refreshes, still include:
and recording the update flag bit of the display module as 1, switching to a sleep mode, then switching to a working mode, and continuing to execute the step 201.
In the embodiment of the present invention, referring to fig. 4, a complete step of the control circuit in the embodiment of the present invention is as follows:
a: starting;
b: initializing a control module MCU, initializing an illumination intensity flag bit Light _ flag =0, and setting an EPD flag bit Updata _ flag =0;
c: the control module MCU enters a sleep mode, and a first MOS switch Q1 and a second MOS switch Q2 in the control circuit are disconnected, so that a power supply P is disconnected to supply power to the photosensitive sensor and the display module EPD; after the sleep mode lasts for a specified time;
d: the control module MCU is awakened and then enters a working mode, controls the first MOS switch Q1 to be turned on, enables a power supply to supply power to the photosensitive sensor through the first power supply control circuit, controls the photosensitive sensor to detect the illumination intensity and analyzes the detected illumination intensity;
e: when the detected illumination intensity is less than or equal to the preset illumination intensity value, executing the step F; and H, when the detected illumination intensity is larger than the preset illumination intensity value, executing the step H.
F: recording an illumination intensity flag bit Light _ flag =1; otherwise, recording an illumination intensity flag bit Light _ flag =0, and recording an EPD flag bit Updata _ flag =0;
g: when the Light _ flag =1 and the Updata_flag =0 are judged, the control module MCU controls the second MOS switch Q2 to be switched on, so that a power supply supplies power to the display module EPD through the second power supply control circuit, the control module MCU drives the display module EPD to be refreshed, the illumination intensity flag bit Updata _ flag =1 is recorded after the refreshing, then the step C is skipped, the MCU enters a sleep mode, and the step D is entered after the sleep mode lasts for a specified time;
h: recording the Light intensity flag bit Light _ flag =0, and the display module EPD flag bit Updata _ flag =0, then skipping to step C, the MCU entering the sleep mode, and after the sleep mode lasts for a specified time, entering step D.
The control method comprises the following steps: in a working mode, the control module controls the switch to be switched on, so that the power supply supplies power to the photosensitive sensor through the first power supply control circuit; the control module obtains the illumination intensity detected by the photosensitive sensor; when the illumination intensity is smaller than or equal to the preset illumination intensity, the control module controls the switch to be turned on, so that the power supply supplies power to the display module through the second power supply control circuit, and the display module is refreshed. Compared with the control method in the prior art, the electronic paper screen can be automatically refreshed without manual intervention, and the control circuit does not need to continuously work and has lower power consumption.
While, for purposes of simplicity of explanation, the foregoing method embodiments have been described as a series of acts or combination of acts, it will be appreciated by those skilled in the art that the present invention is not limited by the illustrated ordering of acts, as some steps may occur in other orders or concurrently with other steps in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.
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.
Finally, it should also be noted that, in this document, relational terms such as first and second, and the like are 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 apparatus 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 apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
The control circuit, the display device and the control method provided by the invention are described in detail, and the principle and the implementation mode of the invention are explained by applying specific examples, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (7)
1. A control circuit, comprising: the device comprises a first power supply control circuit, a second power supply control circuit, a switch, a control module and a photosensitive sensor;
the switch is respectively connected with the power supply, the first power supply control circuit, the second power supply control circuit and the control module;
the photosensitive sensor is respectively connected with the first power supply control circuit and the control module;
the second power supply control circuit and the control module are also connected with the display module;
the control module is configured to control the switch to be switched on and switched off, and when the illumination intensity detected by the photosensitive sensor is smaller than or equal to a preset illumination intensity, the control module controls the power supply to supply power to the display module through the second power supply control circuit and drives the display module to refresh;
the switch includes: a first MOS switch and a second MOS switch;
the first MOS switch is respectively connected with the power supply, the first power supply control circuit and the control module;
the second MOS switch is respectively connected with the power supply, the second power supply control circuit and the control module;
the control module is configured to control the switch to disconnect the power supply from the first power supply control circuit and from the second power supply control circuit in a sleep mode;
in a working mode, the control module controls the first MOS switch to be switched on, so that the power supply supplies power to the photosensitive sensor through the first power supply control circuit, and the control module controls the photosensitive sensor to acquire illumination intensity;
wherein the sleep mode and the operating mode alternate.
2. The control circuit of claim 1, wherein when the illumination intensity is less than or equal to a preset illumination intensity, the control module controls the second MOS switch to be turned on, so that the power supply supplies power to the display module through the second power control circuit, and the control module controls the display module to refresh.
3. A display device comprising a power supply, a display module, and the control circuit of any one of claims 1-2.
4. A control method applied to the control circuit according to any one of claims 1 to 2, the method comprising:
in a working mode, the control module controls the switch to be switched on, so that the power supply supplies power to the photosensitive sensor through the first power supply control circuit;
the control module obtains the illumination intensity detected by the photosensitive sensor;
when the illumination intensity is smaller than or equal to the preset illumination intensity, the control module controls the switch to be turned on, so that the power supply supplies power to the display module through the second power supply control circuit, and the display module is refreshed.
5. The control method of claim 4, wherein in the operating mode, the control module controls the switch to be turned on, so that the power supply supplies power to the photosensitive sensor through the first power supply control circuit, and the method comprises:
in a working mode, the control module controls the first MOS switch to be switched on, so that the power supply supplies power to the photosensitive sensor through the first power supply control circuit.
6. The control method according to claim 5, wherein when the illumination intensity is less than or equal to a preset illumination intensity, the control module controls the switch to be turned on, so that the power supply supplies power to the display module through the second power control circuit, so as to refresh the display module, and the method comprises:
when the illumination intensity is smaller than or equal to the preset illumination intensity, the control module controls the second MOS switch to be turned on, so that the power supply supplies power to the display module through the second power supply control circuit, and the display module is refreshed.
7. The control method according to claim 6, characterized by further comprising:
after the display module is refreshed, switching back to the sleep mode;
in a sleep mode, the control module controls the switch to be switched off, so that the power supply stops supplying power to the photosensitive sensor and the display module.
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| CN107277239A (en) * | 2017-06-09 | 2017-10-20 | 青岛海信移动通信技术股份有限公司 | Mobile terminal and its screen control method |
| CN108398841A (en) * | 2018-03-22 | 2018-08-14 | 京东方科技集团股份有限公司 | A kind of electronic labelling system and electronic labeling information update method |
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