CN112556988B - Display device and detection circuit thereof - Google Patents
Display device and detection circuit thereof Download PDFInfo
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- CN112556988B CN112556988B CN202011390569.5A CN202011390569A CN112556988B CN 112556988 B CN112556988 B CN 112556988B CN 202011390569 A CN202011390569 A CN 202011390569A CN 112556988 B CN112556988 B CN 112556988B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
Abstract
The application provides a display device and a detection circuit thereof, wherein the detection circuit is arranged in a sound box, the voltage of an electric signal provided by a power panel to a working circuit of the sound box when the power panel is in different states is detected, and after the display device is in a standby state and the voltage of the electric signal provided by the power panel to the sound box is reduced, the working circuit is controlled to stop to continue working, so that the power consumption of the display device can be reduced, the overall working efficiency and the stability of the display device can be improved, and the user experience of the display device is further improved.
Description
Technical Field
The present disclosure relates to electronic technology, and particularly to a display device and a detection circuit thereof.
Background
Along with the continuous development of electronic technology and the continuous improvement of customer demands, display devices are continuously developed to large-size, light and thin directions, such as display devices of televisions, and sound devices such as sound equipment are required to be arranged in the display devices while the whole display devices are required to be lighter and thinner. Because of the limitation of the internal space of the display device, the space reserved for the installation position of the sound equipment is smaller, so that the sound equipment installed in the display device can generally only meet the common playing function, cannot realize more sound effects such as heavy bass, and the like, and has poor playing performance.
In some technologies, the display device can also independently set up the stereo set outside the display for the stereo set breaks away from the restriction of display installation space, can realize stronger broadcast performance, more audio effect and realization more functions through bigger volume.
However, the peripheral audio also needs the power panel of the display to supply power, and even when the television is turned off, the peripheral units such as the audio still can receive the electrical signal provided by the power panel and are always in a working state, so that the power consumption of the display device is increased.
Disclosure of Invention
The application provides a display device and a detection circuit thereof, which are used for solving the technical problem of higher power consumption of the display device.
A first aspect of the present application provides a display device including: a display, a peripheral device and a detection device; the display is used for displaying pictures and supplying power to the peripheral device; the detection device is used for controlling the working state of the peripheral device according to the voltage of the electric signal provided by the display to the peripheral device.
In a first embodiment of the first aspect of the present application, the detection device is disposed within the display; alternatively, the detection device is disposed within the peripheral device.
In a first embodiment of the first aspect of the present application, the peripheral device is disposed within the display; alternatively, the peripheral device is disposed outside the display.
In a first embodiment of the first aspect of the present application, the peripheral device includes: a power supply circuit and a working circuit, the display providing an electrical signal to the working circuit through the power supply circuit; the detection device includes: the detection circuit is connected with the power supply circuit; the detection circuit is used for controlling the power supply circuit to be in a closed state when the voltage of the electric signal provided by the display is greater than or equal to a preset threshold value, so that the working circuit is in a working state; and when the voltage of the electric signal provided by the display is smaller than the preset threshold value, controlling the power supply circuit to be in an off state, so that the working circuit stops working.
In a first embodiment of the first aspect of the present application, the detection circuit includes: the voltage dividing circuit is connected with the display and the control circuit and is used for detecting the voltage of the electric signal provided by the display to the power supply circuit; a control circuit connected to the control circuit and the enable signal generation circuit for controlling whether the enable signal generation circuit transmits an enable signal to the power supply circuit according to the voltage detected by the voltage division circuit; the enabling signal is used for controlling the power circuit to be in a closed state; and an enable signal generating circuit connected with the enable signal generating circuit and the power supply circuit and used for transmitting the enable signal to the power supply circuit or not transmitting the enable signal to the power supply circuit under the control of the control circuit.
In a first embodiment of the first aspect of the present application, the voltage dividing circuit includes: a first resistor and a second resistor; the first end of the first resistor is connected with the display, the second end of the first resistor is connected with the first end of the second resistor, the second end of the second resistor is grounded, and the second end of the first resistor and the first end of the second resistor are connected with the control circuit; the control circuit includes: a first switching tube; the control end of the first switching tube is connected with the second end of the first resistor and the first end of the second resistor, the first end of the first switching tube is connected with the power panel and the enabling signal generating circuit, and the second end of the first switching tube is grounded; the enable signal generation circuit includes: a second switching tube and a third resistor; the control end of the second switching tube is connected with the first end of the first switching tube, the first end of the second switching tube is connected with the power panel, and the second end of the second switching tube is grounded through the third resistor.
In a first embodiment of the first aspect of the present application, the first switching tube includes: a reference voltage source.
In a first embodiment of the first aspect of the present application, the second switching tube includes: a triode.
In an embodiment of the first aspect of the present application, when the display device is in a working state, a voltage value V1 of an electrical signal provided by the display to the power supply circuit is equal to or greater than a turn-on voltage of the first switching tube when a voltage division value V1 of a resistance value R1 of the first resistor and a voltage division value R2 of the second resistor (R2/r1+r2); when the display device stops working, the voltage value V2 of the electric signal provided by the display to the power supply circuit is smaller than the conduction voltage of the first switching tube in the partial voltage value V2 (R2/R1+R2) of the resistance value R1 of the first resistor and the partial voltage value R2 of the second resistor.
A second aspect of the present application provides a detection circuit of a display device, which may be used to implement the detection circuit provided in the first aspect of the present application, where implementation manners and principles are the same, and the detection circuit provided in this embodiment includes: the first resistor, the second resistor, the first switch tube, the second switch tube and the third resistor; the first end of the first resistor is connected with a display of the display device, the second end of the first resistor is connected with the first end of the second resistor, the second end of the second resistor is grounded, and the second end of the first resistor and the first end of the second resistor are connected with a control end of a first switch tube; the control end of the first switching tube is connected with the second end of the first resistor and the first end of the second resistor, the first end of the first switching tube is connected with the control ends of the display and the second switching tube, the second end of the first switching tube is grounded, the first end of the second switching tube is connected with the display, and the second end of the second switching tube is grounded through the third resistor.
In summary, the display device and the detection circuit of the display device provided by the embodiments of the present application detect the voltage of the electric signal provided by the power panel to the working circuit of the sound device when the power panel is in different states through the detection circuit arranged in the sound device, and control the stop working circuit to continue working after the display device is in a standby state and the voltage of the electric signal provided by the power panel to the sound device is reduced.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the application, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a display device with a peripheral device according to the present application;
FIG. 2 is a schematic diagram of a display device with a stand-alone power panel;
FIG. 3 is a schematic diagram of another display device with a peripheral device according to the present application;
FIG. 4 is a schematic diagram of another embodiment of a display device with a separate power panel;
FIG. 5 is a schematic diagram showing a connection relationship between a power panel and a load in the device;
FIG. 6 is a schematic diagram of a television power architecture;
FIG. 7 is a schematic diagram of a power supply circuit of a display device;
FIG. 8 is a schematic diagram of a power supply circuit of another display device;
FIG. 9 is a schematic diagram of a display device according to an embodiment of the present application;
fig. 10 is a schematic structural diagram of another embodiment of a display device according to the present application;
FIG. 11 is a schematic diagram of a display device according to another embodiment of the present application;
fig. 12 is a schematic structural diagram of a display device according to another embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terms "first," "second," "third," "fourth" and the like in the description and in the claims and in the above drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented, for example, in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The technical scheme of the application is described in detail below by specific examples. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.
Fig. 1 is a schematic structural diagram of a display device with a peripheral device according to the present application, where the display device shown in fig. 1 is taken as an example of a television 1, and the television 1 includes: a display 11 and a peripheral device 12, the peripheral device in this embodiment being described by taking a sound 12 as an example; wherein sound 12 is arranged behind display 11 inside television 1. The sound box 12 is typically disposed on both left and right sides of the direction in which the user views the display 11, and provides left and right channel sounds, respectively.
In some embodiments, taking a display device provided with a stand-alone power panel as an example, the structure of the television 1 shown in fig. 1 is described, referring to fig. 2, fig. 2 is a schematic structural diagram of an embodiment of the display device provided with a stand-alone power panel, and also taking the display device as an example, the display 11 of the display device specifically includes a display panel 101, a back plate 102, a main board 103, a power panel 104, a rear housing 105, and a base 106. Wherein the display panel 101 is used for displaying pictures; the backboard 102 is located below the display panel 101, and is usually some optical components, and is used for providing sufficient brightness and uniformly distributed light sources, so that the display panel 101 can normally display images, the main board 103 and the power board 104 are arranged on the backboard 102, a plurality of convex hull structures are usually punched on the backboard 102, and the main board 103 and the power board 104 are fixed on the convex hull through screws or hooks; the rear shell 105 is arranged on the display panel 101 in a covering way so as to hide parts of the display device such as the back plate 102, the main board 103, the power panel 104 and the like, thereby achieving an attractive effect; the base 106 is used to support the entire display device. The sound 12 may be disposed inside the display 11, between the back plate 102 and the rear housing 105.
The peripheral devices of the display device shown in fig. 1 and 2 may be disposed inside the display, and as the demands of users on the display device in the market gradually develop towards the direction of thinning and thinning the display device, more and more key components such as the display and the base frame in the display device can be realized with a thinner thickness, so as to reduce the overall thickness of the electronic device. Therefore, in the television 1 shown in fig. 1 and 2, in addition to providing some means for display, the space reserved for the sound 12 is smaller and smaller, and the manufacturer of the television 1 can only reduce the functions of the sound 12 such as heavy bass, etc. to reduce the space occupied by the sound 12 in the display 11. The sound equipment 12 installed on the television 1 can only meet the common playing function, cannot realize more sound effects, and reduces the playing performance of the sound equipment 12.
Fig. 3 is a schematic structural diagram of another display device with a peripheral device according to the present application, in the display device shown in fig. 3, the display device is also taken as a television 1 as an example, the television 1 includes a peripheral device 12 independently disposed outside the display 11, and the peripheral device 12 may be a sound 12, and in this case, since the sound 12 is separated from the limitation of the space behind the display 11, a stronger playing performance, a more sound effect and a more function can be achieved through a larger volume. In one application, as shown in fig. 3, a user 2 can watch audio and video contents using a television 1, and then the television 1 displays a picture through a display 11 and plays sound through a sound box 12. In another application, the user 2 may use an electronic device such as a mobile phone, and after a connection relationship is established with the sound 12 by using a bluetooth mode, the mobile phone may use the sound 12 of the television 1 to play sound, so as to realize more applications of the sound 12 set by the television 1, and improve the use experience of the user 2.
Fig. 4 is a schematic structural diagram of another embodiment of a display device provided with a separate power panel, which can be used to implement the display device shown in fig. 3, and also takes the display device as a television set as an example, compared with the embodiment shown in fig. 2, in this embodiment, the peripheral device is disposed outside the display of the display device, for example, the sound equipment 12 (peripheral device) in fig. 4 may be disposed under the whole of the display 11 and may be supported by the base 106, or may be connected by the rear case 105.
In some embodiments, fig. 5 is a schematic diagram of connection between a power panel and a load in a display device, and as shown in fig. 5, the power panel 104 includes an input terminal 41 and an output terminal 42 (a first output terminal 421, a second output terminal 422, and a third output terminal 423 are shown in the drawings), where the input terminal 41 is connected to a mains supply, the output terminal 42 is connected to the load, for example, the first output terminal 421 is connected to the display panel 101, the second output terminal 422 is connected to the main board 103, and the third output terminal 423 is connected to the sound equipment 12. The power panel 104 needs to convert the ac power of the utility power into a dc signal required by the load, and the dc power generally has different specifications, for example, the audio in the display device needs a dc signal with a voltage of 18V, and the display panel needs a dc signal with a voltage of 12V, and so on.
In some embodiments, taking a television as an example to describe a power architecture of a display device, fig. 6 is a schematic diagram of the power architecture of the television, and as shown in fig. 6, a power panel may specifically include: a rectifier bridge, a power factor correction (Power Factor Correction, PFC) module and a resonant converter (LLC) module, the LLC module including a synchronous rectifier circuit (not shown in fig. 6), the PFC module being connected to the LLC module, the LLC module being connected to a load.
The rectifier bridge is used for rectifying input commercial alternating current and inputting full-wave signals to the PFC module. An electromagnetic interference (Electromagnetic Interference, EMI) filter (not shown in fig. 6) may be connected to the ac power source before it is input to the PFC module, to high frequency filter the input ac power source.
The PFC module generally comprises a PFC inductor, a switching power device and a PFC control chip, and mainly performs power factor correction on an input alternating current power supply to output stable direct current bus voltage (such as 380V) to the LLC module. The PFC module can effectively improve the power factor of the power supply and ensure the same phase of voltage and current. Alternatively, in some embodiments, the PFC module may not be provided in the power supply architecture as shown in fig. 6.
The LLC module can adopt a double-MOS tube LLC resonant conversion circuit, and a synchronous rectification circuit is arranged in the LLC module generally and mainly comprises a transformer, a controller, two MOS tubes and a diode. In addition, the LLC module may also include pulse frequency adjustment (Pulse frequency modulation, PFM) circuits, capacitors, inductors, and other components. The LLC module can specifically step down or step up the direct current bus voltage input by the PFC module and output constant voltage to a load. Typically, the LLC module is capable of outputting a variety of different voltages to meet the demands of different loads. Alternatively, in other embodiments, the LLC module shown in FIG. 6 may be replaced with a flyback voltage conversion module that steps down or up the voltage and outputs a constant voltage to the load
In some embodiments, fig. 7 is a schematic diagram of a power supply circuit of a display device, where the display device may be any one of fig. 1 to 6, a power board 104 is disposed in a display 11 of the display device, where the power board 104 may be used to receive ac mains power and supply power to the display device as a whole, and a main board 103 may be further included in the display 11, where the main board 103 may be used as a control device to implement functions such as displaying of the display device. The power board 104 may output at least two power supply signals, which may be 12V and 18V, to the main board 103. Then, after the display device sets up the peripheral device 12, one of the electrical signals provided by the power panel 104 may be used to supply power to the peripheral device 12, where the voltage of the one electrical signal may be 18V, and in a specific implementation, the peripheral device may be an audio device as shown in any of the embodiments of fig. 1-4.
Meanwhile, taking the display device shown in fig. 7 as a television as an example, the television is recorded as an operating state when being turned on and as a standby state when being turned off, when the television is in the operating state, the power board 104 arranged in the display 11 of the display device can provide at least two paths of electric signals, for example, electric signals of the displays 18V and 12V, to the main board 103, when the television is in the standby state, the power board 104 can reduce the voltage of the electric signal provided to the main board from 18V to 15V and the voltage of the electric signal provided to the main board from 12V to 9V, so as to reduce the energy consumption of the television,
however, when the television is in the standby state, although the power panel 104 reduces the voltage of the output electric signal, the external device such as the sound equipment 12 can still receive the electric signal and maintain the powered-on state, for example, the sound equipment 12 will always be in the wireless receiving state, and find a state of being connected with other electronic devices and ready to play, and if the sound equipment 12 is kept in the powered-on state, the sound equipment 12 will always be in the bluetooth on state, so that other electronic devices can search for the sound equipment 12 to connect.
Therefore, in order to avoid the peripheral device provided in the display device shown in fig. 7, while the display device is still operating in the low power mode as a whole, and the power consumption of the display device is increased, in some technologies, fig. 8 is a schematic diagram of a power supply circuit of another display device, in which a switching circuit 107 is further provided in the display 11, the switching circuit 107 being provided between the power board 104 and the peripheral device 12 and being connected to the main board 103. When the display device is in a working state, the main board 103 can control the switch circuit 107 to be turned on, so that the 18V electric signal provided by the power board 104 can supply power to the external device 12 through the switch circuit 107; when the display device is in the standby state, the main board 103 may control the switch circuit to be turned off, so that the 15V electrical signal provided by the power board 104 cannot supply power to the peripheral device 12 through the switch circuit 107, and further, the peripheral device 12 cannot obtain the electrical signal to continue to operate when the display device is in the standby state, thereby finally reducing the overall power consumption of the display device. In some embodiments, the switching circuit 107 may be a transistor, a MOS transistor, or the like.
However, in order to realize the power supply circuit shown in fig. 8, an additional design space is required on the circuit board in the display 11 and inside the rear case of the display device for accommodating the switching circuit 107, and the main board 103 is required to specifically send a control signal to the switching circuit 107 to be able to control the on and off of the switching circuit 107. Besides increasing the cost of the display device and reducing the reliability of the switch circuit 107 when the display device works, the control operation performed by the main board 103 is increased, so that the power consumption of the display device is increased, the overall working efficiency and stability of the display device are affected, and the user experience of the display device is further reduced.
Therefore, an embodiment of the present application further provides a display device and a detection circuit thereof, where the detection device is disposed in the display device, so as to detect a voltage of an electrical signal provided by the display device to the external device when the display device is in different states, and actively turn off the external device after the display device is in a standby state and a power panel of the display device decreases the voltage of the electrical signal provided by the external device, so that the cost of the display device is not increased, the reliability of the display device is not affected, and the control operation of other devices is not increased by the differential pressure of the electrical signal, so that the power consumption of the display device can be reduced, the overall working efficiency and stability of the display device can be improved, and further the user experience of the display device is improved.
Fig. 9 is a schematic structural diagram of an embodiment of a display device according to the present application, where the display device shown in fig. 9 may be a display device as described in any one of fig. 1 to 7. In this display device, the display 11 is available for displaying a picture, and the display 11 includes: the power panel 104, the main board 103, and a display module (display module is not shown in the figure) such as a display panel may be disposed on the same circuit board in some embodiments. The power board 104 may be used to supply power to the motherboard 103, and the motherboard 103 may be used to determine a picture to be displayed and control the display panel to display the picture. When the display device is in a working state, the power panel 104 in the display 11 can provide at least two paths of electric signals for the main board 103, and the voltages of the two paths of electric signals can be 12V electric signals and 18V electric signals respectively; when the display device is in a standby state, the voltage of the two electrical signals provided by the power board 104 to the main board 103 is reduced, and can be respectively reduced from 12V to 9V and from 18V to 15V, so as to save energy consumption.
The display device peripheral 12 shown in fig. 9, the peripheral 12 may be an audio device 12, or the peripheral may be other devices/units capable of implementing functions, and the peripheral is taken as an audio device 12 as an exemplary illustration and not a limitation in the embodiments of the present application. Specifically, as shown in fig. 9, the sound equipment 12 may receive and play a sound signal (connection relationship is not shown in the figure, and may be a wired connection or a wireless connection) provided by the main board 103.
In some embodiments, the working circuit 121 in the sound device 12, which is specifically used for playing sound signals, may be powered by the power board 104, where the power board 104 may specifically provide a voltage to the working circuit 121, the voltage may be 18V, or an electrical voltage signal provided by the power board 104 to the main board 103 may also be connected to the working circuit 121, so that the main board 103 and the working circuit 121 share one electrical signal output by the power board 104, and the one electrical signal output may be 18V.
In some embodiments, the display device provided by the embodiments of the present application further includes a detection device 13, where the detection device 13 may be configured to detect a voltage of an electrical signal provided by the power panel 104 of the display 11 to the external device 12, and control an operating state of the external device 12 according to a detection result.
In some embodiments, the peripheral device 12 includes at least: an operating state and a rest state. Meanwhile, since the voltage of the electric signal supplied from the power board 104 to the operation circuit 121 of the external device 12 is 18V when the display device is in the operation state, the voltage of the electric signal supplied from the power board 104 to the operation circuit 121 of the external device 12 is 15V when the display device is in the standby state. The detection device 13 may set a preset threshold value, so that when the detection device 13 detects that the voltage of the electric signal provided by the power panel 104 to the external device 12 is greater than or equal to the preset threshold value, it indicates that the display device is in an operating state, and the peripheral device 12 needs to be controlled to be in an operating state as well, and when the detection device 13 detects that the voltage of the electric signal provided by the power panel 104 to the external device 12 is less than the preset threshold value, it indicates that the display device is in a standby state, and the peripheral device 12 needs to be controlled to stop operating.
In the embodiment shown in fig. 9, the detecting device 13 may directly control the operation state of the peripheral device 12, for example, directly turn on or off the operation circuit 132 of the peripheral device 12, or the like, according to the detected voltage of the power board 104 to the operation circuit 121 of the peripheral device 12. In another implementation manner, the detection device 13 may control the on-off of the electrical signal provided by the power panel 104 to the external device 12 to achieve the power on/off of the working circuit 132, so that the working circuit 132 of the external device 12 starts to work after power on/off and stops working after power off.
In one embodiment, fig. 10 is a schematic structural diagram of another embodiment of a display device according to the present application, where, in the display device shown in fig. 10, the peripheral device 12 specifically includes: a power supply circuit 122 and an operation circuit 121. The power board 104 supplies power to the working circuit 121 of the peripheral device 12 through the power circuit 122 in the peripheral device 12, and the power circuit 122 may be a DC/DC circuit, and is configured to perform voltage conversion on an 18V electrical signal provided by the power board 104, and then provide the voltage converted electrical signal to the working circuit 121.
In the display device shown in fig. 10, the detection device 13 may be disposed in the peripheral device 12, and when the detection circuit 131 in the detection device 13 detects that the voltage of the electric signal provided by the power board 104 to the working circuit 121 is greater than or equal to the preset threshold value, the power board 104 is enabled to supply power to the working circuit 121 through the power circuit 122 by controlling the power circuit 122 to be in a closed state, so as to implement setting the peripheral device 12 to be in an operating state; when the detection circuit 131 detects that the voltage of the electric signal provided by the power board 104 to the working circuit 121 is smaller than the preset threshold, the power board 104 cannot continue to supply power to the working circuit 121 through the power circuit 122 by controlling the power circuit 122 to be in the off state, so that the peripheral device 12 is set to be in the off state.
In another embodiment, fig. 11 is a schematic structural diagram of another embodiment of the display device provided by the present application, and in the display device shown in fig. 11, the detection device 13 may be disposed in the display device 11, and at this time, the specific implementation manner and principle of each functional module are the same as those shown in fig. 10, and will not be repeated.
In some embodiments, fig. 12 is a schematic structural diagram of still another embodiment of a display device provided by the present application, and fig. 12 shows a possible implementation manner of the detection circuit 131 in the embodiment shown in fig. 12 or fig. 11, where the detection circuit 131 includes: a voltage dividing circuit 1311, a control circuit 1312, and an enable signal generating circuit 1313.
The voltage dividing circuit 1311 is connected to the circuit board 104 and the control circuit 1312, respectively, and is configured to detect a voltage of an electrical signal provided by the power board 104. In the example shown in fig. 12, the voltage dividing circuit 1311 may include a first resistor R977 and a second resistor R976, where a first end of the first resistor R977 is connected to the power board 104, a second end of the first resistor R977 is connected to a first end of the second resistor R976, and a control end of the first switch tube N906 in the control circuit 1312, and a second end of the second resistor R976 is grounded.
The control circuit 1312 is connected to the voltage division circuit 1311 and the enable signal generation circuit 1313, respectively, and is operable to determine the voltage of the electrical signal supplied from the power board 104 by the voltage division circuit 1311, and to control the enable signal generation circuit 1313 in accordance with the voltage. In the example shown in fig. 12, the control circuit 1312 may include: the first switching tube N906, the first switching tube N906 may be a reference voltage source TL431. The first end (reference numeral 1) of the first switching tube N906 is connected to the power board 104 through the fifth resistor R978 and the fourth resistor R980, the second end (reference numeral 3) of the first switching tube N906 is grounded, and the control end (reference numeral 2) of the first switching tube N906 is connected to the second end of the first resistor R977 and the first end of the second resistor R976.
The enable signal generation circuit 1313 is connected to the control circuit 1312 and the power supply circuit 122, and may send or not send an enable signal to the power supply circuit 122 under the control of the control circuit 1312, where the power supply circuit is in a closed state after receiving the enable signal when the enable signal generation circuit 1313 sends the enable signal to the power supply circuit; when the enable signal generation circuit 1313 does not transmit an enable signal to the power supply circuit, the power supply circuit is in an off state when the enable signal is not received. In the example shown in fig. 11, the enable signal generation circuit 1313 may include: the second switch V922 and the third resistor R979 may be transistors. The first end (reference numeral 1) of the second switching tube V922 is connected to the power board 104 through the fourth resistor R980, the second end (reference numeral 3) of the second switching tube V922 is grounded through the third resistor R979, and the control end (reference numeral 2) of the second switching tube V922 is connected to the first end of the first switching tube N906.
In some embodiments, the resistance value r1=11k of the first resistor and the resistance value r2=2k of the second resistor, and the reference voltage of the first switch tube is 2.5V. The detection circuit 131 shown in fig. 11 includes at least two states:
in the first state, when the display device is in the standby state, the voltage value of the electric signal provided by the power panel 104 to the power circuit 122 is 15V, at this time, the voltage of the electric signal provided by the power panel 104 is in the voltage dividing circuit, the voltage dividing value at the second end of the first resistor R977 and the first end of the second resistor R976 is v2× (r2/r1+r2) ×15=2.30v, V1 is smaller than the reference voltage of the first switch tube N906, the first switch tube N906 is closed, when no current flows through the first end and the second segment of the first switch tube N906, the second switch tube V322 is in the open state, and no current flows through the resistor R979, so that the voltage dividing across the resistor R979 is 0V, which is regarded as not sending the enable signal to the power circuit 122, and when the power circuit 122 does not receive the enable signal, is in the open state.
In the second state, when the display device is in the operating state, the voltage of the electrical signal provided by the power board 104 to the power circuit 122 is 18V, at this time, in the voltage dividing circuit, the voltage dividing value at the second end of the first resistor R977 and the first end of the second resistor R976 is v1× (r2/r1+r2) ×18=2.76V, V1 is greater than the reference voltage of the first switching tube N906, the first switching tube N906 is turned on, and after a current flows through the first end and the second section of the first switching tube N906, the voltage drop generated in the fifth resistor R978 can make the B-E junction of the second switching tube V322 forward bias, and finally, the second switching tube V322 is switched to the conducting state, and the current can pass through the E-C junction of the second switching tube, that is, from the first end to the second end to the ground point. At this time, the voltage generated when the current flows through the resistor R979 may be used as an enable signal and sent to the power circuit 122, and when the power circuit 122 receives the enable signal, the power circuit may be switched to the closed state according to the enable signal.
In some embodiments, the voltage of the enable signal transmitted by the detection circuit 131 to the power supply circuit 122 is not particularly limited, and when no signal is transmitted or the transmitted signal voltage is 0, the enable signal is regarded as not being transmitted by the detection circuit 131 to the power supply circuit 122; when the transmitted signal voltage is greater than 0, it can be regarded that the detection circuit 131 transmits an enable signal to the power supply circuit 122.
In some embodiments, in the example shown in fig. 11, the detection circuit 131 may further include: a fourth resistor R980, which is a current limiting resistor for V922; the capacitor C944 can be used to avoid malfunction caused by transient voltage drop.
In summary, in the display device provided in this embodiment, through the detection circuit that sets up in the stereo set, detect the voltage of the electric signal that the power strip provided to the operational circuit of stereo set when different states, and after the display device is in standby state, the voltage of the electric signal that the power strip provided to the stereo set reduces, control stop operational circuit continued work, thereby through the setting up of comparatively simple detection circuit in the stereo set, can regard the pressure differential of electric signal itself as enabling signal, passive control has been realized, neither the cost of display device is increased, nor the reliability of display device can be influenced, and control operation that the pressure differential realization control of electric signal itself can not increase other equipment, finally, can reduce the consumption of display device, and can improve the whole work efficiency and the stability of display device, and then improved display device's user experience.
In the foregoing embodiments of the present application, the peripheral unit is an audio device as an exemplary illustration, and the peripheral unit may be another device or unit, and the detection circuit provided by the present application is provided therein, so as to control the working state of the working circuit, and its implementation manner is the same as the principle and will not be repeated.
Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the method embodiments described above may also be implemented by hardware associated with program instructions. The foregoing program may be stored in a computer readable storage medium. The program, when executed, performs steps including the method embodiments described above; and the aforementioned storage medium includes: various media that can store program code, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: 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 or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (9)
1. A display device, comprising:
a display, a peripheral device and a detection device;
the display is used for displaying pictures and supplying power to the peripheral device;
the peripheral device includes: a power supply circuit and a working circuit, the display providing an electrical signal to the working circuit through the power supply circuit;
the detection device includes: the detection circuit is connected with the power supply circuit;
the detection circuit is used for controlling the power supply circuit to be in a closed state when the voltage of the electric signal provided by the display to the working circuit of the peripheral device is a first voltage, so that the working circuit is in a working state;
when the voltage of the electric signal provided by the display to the working circuit of the peripheral device is the second voltage, the power supply circuit is controlled to be in a disconnected state, so that the working circuit stops working;
wherein the first voltage is greater than the second voltage;
the detection circuit includes:
the voltage dividing circuit is connected with the display and the control circuit and is used for detecting the voltage of the electric signal provided by the display to the power supply circuit;
a control circuit connected to the voltage dividing circuit and the enable signal generating circuit for controlling whether the enable signal generating circuit transmits an enable signal to the power supply circuit according to the voltage detected by the voltage dividing circuit; the enabling signal is used for controlling the power circuit to be in a closed state;
and the enabling signal generating circuit is connected with the control circuit and the power supply circuit and is used for sending the enabling signal to the power supply circuit or not sending the enabling signal to the power supply circuit under the control of the control circuit.
2. The display device of claim 1, wherein the display device comprises a display device,
the detection device is arranged in the display;
alternatively, the detection device is disposed within the peripheral device.
3. The display device according to claim 1 or 2, wherein,
the peripheral device is arranged in the display;
alternatively, the peripheral device is disposed outside the display.
4. A display device according to claim 3, wherein,
the peripheral device includes: a power supply circuit and a working circuit, the display providing an electrical signal to the working circuit through the power supply circuit;
the detection device includes: the detection circuit is connected with the power supply circuit;
the detection circuit is used for detecting the presence of a signal,
when the voltage of the electric signal provided by the display is greater than or equal to a preset threshold value, the power circuit is controlled to be in a closed state, so that the working circuit is in a working state;
and when the voltage of the electric signal provided by the display is smaller than the preset threshold value, controlling the power supply circuit to be in an off state, so that the working circuit stops working.
5. The display device of claim 1, wherein the display device comprises a display device,
the voltage dividing circuit includes: a first resistor and a second resistor; the first end of the first resistor is connected with the display, the second end of the first resistor is connected with the first end of the second resistor, the second end of the second resistor is grounded, and the second end of the first resistor and the first end of the second resistor are connected with the control circuit;
the control circuit includes: a first switching tube; the control end of the first switching tube is connected with the second end of the first resistor and the first end of the second resistor, the first end of the first switching tube is connected with a power panel and the enabling signal generating circuit, and the second end of the first switching tube is grounded;
the enable signal generation circuit includes: a second switching tube and a third resistor; the control end of the second switching tube is connected with the first end of the first switching tube, the first end of the second switching tube is connected with the power panel, and the second end of the second switching tube is grounded through the third resistor.
6. The display device of claim 5, wherein the display device comprises a display device,
the first switching tube includes: a reference voltage source.
7. The display device of claim 5, wherein the display device comprises a display device,
the second switching tube includes: a triode.
8. The display device according to any one of claims 5 to 7, wherein,
when the display device is in a working state, the voltage value V1 of an electric signal provided by the display to the power supply circuit is larger than or equal to the conduction voltage of the first switch tube when the voltage division value V1 of the resistance value R1 of the first resistor and the voltage division value V1 of R2 of the second resistor (R2/R1+R2);
when the display device stops working, the voltage value V2 of the electric signal provided by the display to the power supply circuit is smaller than the conduction voltage of the first switching tube in the partial voltage value V2 (R2/R1+R2) of the resistance value R1 of the first resistor and the partial voltage value R2 of the second resistor.
9. A detection circuit of a display device, wherein the detection circuit is applied to the display device according to any one of claims 1 to 8, the detection circuit comprising:
the first resistor, the second resistor, the first switch tube, the second switch tube and the third resistor;
the first end of the first resistor is connected with a display of the display device, the second end of the first resistor is connected with the first end of the second resistor, the second end of the second resistor is grounded, and the second end of the first resistor and the first end of the second resistor are connected with a control end of a first switch tube; the control end of the first switching tube is connected with the second end of the first resistor and the first end of the second resistor, the first end of the first switching tube is connected with the control ends of the display and the second switching tube, the second end of the first switching tube is grounded, the first end of the second switching tube is connected with the display, and the second end of the second switching tube is grounded through the third resistor;
the detection circuit is used for controlling the power supply circuit to be in a closed state when the voltage of the electric signal provided by the display to the working circuit of the external device is a first voltage, so that the working circuit is in a working state;
when the voltage of the electric signal provided by the display to the working circuit of the peripheral device is the second voltage, the power supply circuit is controlled to be in a disconnected state, so that the working circuit stops working;
wherein the first voltage is greater than the second voltage;
the detection circuit includes:
the voltage dividing circuit is connected with the display and the control circuit and is used for detecting the voltage of the electric signal provided by the display to the power supply circuit;
a control circuit connected to the voltage dividing circuit and the enable signal generating circuit for controlling whether the enable signal generating circuit transmits an enable signal to the power supply circuit according to the voltage detected by the voltage dividing circuit; the enabling signal is used for controlling the power circuit to be in a closed state;
and the enabling signal generating circuit is connected with the control circuit and the power supply circuit and is used for sending the enabling signal to the power supply circuit or not sending the enabling signal to the power supply circuit under the control of the control circuit.
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| CN202011390569.5A CN112556988B (en) | 2020-12-02 | 2020-12-02 | Display device and detection circuit thereof |
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| CN202011390569.5A CN112556988B (en) | 2020-12-02 | 2020-12-02 | Display device and detection circuit thereof |
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