CN114023255A - Drive circuit, drive device, and display device - Google Patents
Drive circuit, drive device, and display device Download PDFInfo
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- CN114023255A CN114023255A CN202111386028.XA CN202111386028A CN114023255A CN 114023255 A CN114023255 A CN 114023255A CN 202111386028 A CN202111386028 A CN 202111386028A CN 114023255 A CN114023255 A CN 114023255A
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- driving circuit
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- control module
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
Abstract
The application discloses a driving circuit, a driving device and a display device. The driving circuit comprises a first sub-driving circuit and a second sub-driving circuit, wherein the first sub-driving circuit comprises a first input control module and a first capacitor, the first input control module is used for providing input voltage for the first light-emitting device, and the first capacitor is electrically connected with the first input control module; the second sub-driving circuit comprises a second input control module, and the second input control module is used for providing input voltage for the second light-emitting device; the switch is connected between the first sub-driving circuit and the second sub-driving circuit and is configured to be switched off when the first sub-driving circuit drives the first light-emitting device, and the first capacitor is subjected to energy storage; the second sub-driving circuit is conducted after driving the second light-emitting device to provide input current for the second sub-driving circuit through the first capacitor, so that the input voltage required by the second sub-driving circuit is reduced, and the purpose of improving energy conservation is finally achieved.
Description
Technical Field
The application relates to the field of display devices, in particular to a driving circuit, a driving device and a display device.
Background
Light emitting diodes are referred to as LEDs for short. The organic light emitting diode is made of compounds containing gallium (Ga), arsenic ((A s), phosphorus (P), nitrogen (N) and the like, and can radiate visible light when electrons and holes are compounded, so that the organic light emitting diode can be used for manufacturing the light emitting diode, and can be used as an indicator lamp in circuits and instruments, or form character or digital display.
Advanced portable devices require display technologies that must meet low power consumption and high performance, and mobile display technologies have advanced rapidly in the past few years, and the larger the size of the display screen and the higher the resolution, the more energy consumption is increased, thereby prolonging the service life of the mobile display device.
Therefore, it is necessary to further improve the energy saving effect of the Led display.
Disclosure of Invention
The embodiment of the application provides a driving circuit, a driving device and a display device, and the energy-saving effect is improved.
An embodiment of the present application provides a driving circuit, including:
the first sub-driving circuit comprises a first input control module and a first capacitor, the first input control module is used for providing input voltage for the first light-emitting device, and the first capacitor is electrically connected with the first input control module; the second sub-driving circuit comprises a second input control module, and the second input control module is used for providing input voltage for the second light-emitting device;
the switch is connected between the first sub-driving circuit and the second sub-driving circuit and is configured to be switched off when the first sub-driving circuit drives the first light-emitting device, and the first capacitor is subjected to energy storage; and after the second sub-driving circuit drives the second light-emitting device, the second sub-driving circuit is conducted to provide input current for the second sub-driving circuit through the first capacitor.
In an alternative implementation, the switch is a bipolar diode.
In an optional implementation manner, the second sub-driving circuit further includes a second capacitor, and the second capacitor is electrically connected to the second input control module.
In an optional implementation manner, the first input control module includes a first triode electrically connected to a first pole of the first light emitting device, a collector of the first triode is electrically connected to a power supply voltage, and an emitter of the first triode is electrically connected to the first capacitor.
In an optional implementation manner, the second input control module includes a second triode electrically connected to the second pole of the second light emitting device, a collector of the second triode is electrically connected to the power voltage, and an emitter of the second triode is electrically connected to the second capacitor.
In an alternative implementation, the emitter of the first triode is electrically connected with the first capacitor through the first resistor.
In an alternative implementation, the emitter of the second triode is electrically connected with the second capacitor through the second resistor.
In an optional implementation manner, one end of the first light emitting device, which is not electrically connected to the first input control module, and one end of the second light emitting device, which is not electrically connected to the second input control module, are used to access the same power voltage, so as to form a matrix structure.
The embodiment of the application provides a driving device, which is provided with the driving circuit.
The embodiment of the application provides a display screen which is provided with the driving device.
The driving circuit provided by the embodiment of the application comprises a first sub-driving circuit and a second sub-driving circuit, wherein the first sub-driving circuit comprises a first input control module and a first capacitor, the first input control module is used for providing input voltage for a first light-emitting device, and the first capacitor is electrically connected with the first input control module; the second sub-driving circuit comprises a second input control module, and the second input control module is used for providing input voltage for the second light-emitting device; the switch is connected between the first sub-driving circuit and the second sub-driving circuit and is configured to be switched off when the first sub-driving circuit drives the first light-emitting device, and the first capacitor is subjected to energy storage; and after the second sub-driving circuit drives the second light-emitting device, the second sub-driving circuit is conducted to provide input current for the second sub-driving circuit through the first capacitor. After the first sub-driving circuit drives the first light-emitting device, the corresponding capacitor stores charges, the holding switch is turned on at the moment, and the charges of the first capacitor are transferred to the second sub-driving circuit, so that voltage is provided for the second sub-driving circuit, the input voltage required by the second sub-driving circuit is reduced, and the aim of improving energy conservation is fulfilled finally.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a structural framework diagram of a driving circuit according to an embodiment of the present application.
Fig. 2 is a circuit schematic diagram of a driving circuit according to another embodiment of the present application.
Wherein, in the figure:
11-a first light emitting device; 12-a second light emitting device; 21-a first sub-driver circuit; 211-a first input control module; 212-first capacitance; 22-a second sub-driver circuit; 221-a second input control module; 222-a second capacitance; 23-switch.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
The following terms apply to the following understanding, unless contradicted by general understanding:
the term "driving" means that the input control module generates a voltage signal adapted to parameters (e.g., rated voltage, rated current) of the light emitting device, and the light emitting device emits light after the voltage signal is transmitted to the light emitting device.
The term "sub-driver circuit" included in the terms "first sub-driver circuit" and "second sub-driver circuit" refers to a structure in which the driver circuits are divided as needed for expression, and does not have a special meaning.
The display device of the embodiment of the present application includes a display panel, a driving device, and a light emitting array composed of light emitting devices, and other components known in the art. The driving device comprises a power supply and a driving circuit, wherein the power supply is externally connected with the driving circuit.
It should be understood that specific examples of the Display device herein include, but are not limited to, any type of device having a Display function, such as a Liquid Crystal Display (LCD), an Organic electroluminescent Display (OLED) Display device, a Quantum Dot Light Emitting diode (QLED) Display device, a curved Display device, or the like.
Referring to fig. 1, the driving circuit according to the embodiment of the present disclosure is suitable for driving a first light emitting device 11 and a second light emitting device 12, where the first light emitting device 11 and the second light emitting device 12 may be Light Emitting Diodes (LEDs) or the like.
It should be understood that the light emitting device of the present application is not limited to the first light emitting device 11, the second light emitting device 12, but also a third light emitting device such as an nth light emitting device, which is provided according to actual needs.
The drive circuit includes:
the first sub-driving circuit 21 includes a first input control module 211 and a first capacitor 212, the first input control module 211 is configured to provide an input voltage for the first light emitting device 11, and the first capacitor 212 is electrically connected to the first input control module 211; the second sub-driving circuit 22 includes a second input control module 221, and the second input control module 221 is used for providing an input voltage for the second light emitting device 12;
a switch 23 interposed between the first sub-driving circuit 21 and the second sub-driving circuit 22, and configured to be turned off when the first sub-driving circuit 21 drives the first light emitting device 11, and store energy in the first capacitor 212; after the second sub driving circuit 22 drives the second light emitting device 12, it is turned on to provide the input current to the second sub driving circuit 22 through the first capacitor 212.
In the prior art, for the purpose of saving energy, the adopted measures are usually dedicated to the power consumption of the light emitting device, which inevitably damages the performance of the whole driving circuit to some extent. Although the prior art has explored applications where capacitors have the property of storing electrical energy.
However, it should be understood that in the prior art, the capacitor is not necessarily configured as a driving circuit for the light emitting device, and even if the capacitor is configured, the capacitor is also in the form of a register capacitor.
The inventors have unexpectedly found that discharging the capacitor storing the electric charge under a specific condition can effectively reduce the driving voltage required for driving the light emitting device, which is effective for reducing power consumption. Thus, the present application expressly configures that there is functionally a first capacitor 212 and a switch 23 that support each other. After the first sub-driving circuit 21 drives the first light emitting device 11, the first capacitor 212 stores charges, and the charges are generated by substantially charging the first capacitor 212 generated by the voltage input of the first input control module 211. At this time, if the hold switch 23 is turned on, the charges of the first capacitor 212 are transferred to the second sub-driving circuit 22, and the current generated thereby provides an instantaneous voltage for the second sub-driving circuit 22, so as to reduce the input voltage required by the second sub-driving circuit 22, and finally achieve the purpose of improving energy saving.
It should be clarified that the aforementioned reference to "the driving circuit includes the first sub-driving circuit 21 and the second sub-driving circuit 22" does not mean that the number of sub-driving circuits included in the driving circuit of the present application is only an even number. In fact, the driving circuit of the present application may be made of any natural number greater than or equal to 2. The first sub-driving circuit 21 and the second sub-driving circuit 22 are shown only as needed for convenience of explanation.
This control node of the switch 23 after the first sub-driving circuit 21 completes driving and before the second sub-driving circuit 22 does not generate driving can be realized in a manner that can be easily conceived by those skilled in the art. For example, a chip storing a program for executing the function, or hardware such as a single chip microcomputer may be used.
The specific method of controlling the node may be exemplified, but is not limited thereto. A time t as a timing start point from the output of the driving voltage from the first sub-driving circuit 210The second sub-driving circuit 22 at time t0+T1Generating drive, T1For the interval period of the first sub-driving circuit 21 and the second sub-driving circuit 22 for sequentially generating driving, a known control unit is usually configured to sequentially generate driving for the first sub-driving circuit 21 and the second sub-driving circuit 22. Preset time T2，T2﹤T1，T2The voltage is required to be set according to the magnitude of the instantaneous voltage generated by the first capacitor 212 when the switch 23 is turned on, specifically, according to the parameter of the first capacitor 212 and the preset corresponding relationship. At time t0+T2When the switch 23 is turned on, the duration of the current generated by the discharge of the first capacitor 212 is T1-T2. Thus, the timer may be configured at time t0+T2The switch 23 is controlled to conduct.
The switch 23 may be a Metal Oxide Semiconductor (MOS), a bipolar diode, or a transmission gate. For the sake of demonstration, a bipolar diode is taken as an example, but this does not represent the effect of the bipolar diode.
Here, the bipolar diode may be an NPN type bipolar diode, or another type bipolar diode.
For the case where the switch 23 is a bipolar diode, the collector of the bipolar diode (as numbered Q5 in fig. 1) is electrically connected to the first sub-driving circuit 21, and the emitter of the bipolar diode is electrically connected to the second sub-driving circuit 22.
In one implementation, the emitter of the bipolar diode is connected to the second sub-driving circuit 22 through a third resistor (e.g., R5, R6 in fig. 1).
As an implementation manner, the first capacitor 212 and the second capacitor 222 may be any type of liquid crystal capacitor, such as a parasitic capacitor.
In one implementation, the first input control module 211 includes a first transistor (i.e., device numbered Q1) electrically connected to a first pole of the first light emitting device 11, a collector of the first transistor is electrically connected to the power voltage, and an emitter of the first transistor is electrically connected to the first capacitor 212. It should be readily appreciated that the base of the first transistor is electrically connected to an external voltage.
Similarly, the second input control module 221 includes a second transistor (i.e., device numbered Q2) electrically connected to the second pole of the second light emitting device 12, a collector of the second transistor being electrically connected to the supply voltage, and an emitter of the second transistor being electrically connected to the second capacitor 222.
As an implementation manner, the emitter of the first triode may be further connected to the first capacitor 212 through the first resistor. The resistor may be a single resistor or a plurality of resistors connected in series, such as the element numbered R, R1 in FIG. 1.
Similarly, the emitter of the second transistor may be connected to the first capacitor 212 through a second resistor. The resistor may be a single resistor or a plurality of resistors connected in series, such as the element numbered R, R2 in FIG. 1.
In one implementation, one end of the first light emitting device 11 not electrically connected to the first input control module 211 and one end of the second light emitting device 12 not electrically connected to the second input control module 221 are used for receiving the same power voltage, so as to form a matrix structure formed by the first sub-driving circuit 21 and the second sub-driving circuit 22, so as to form a matrix structure, i.e., a determinant circuit structure.
For clarity of description of the circuit of the matrix structure, please refer to fig. 2, which exemplifies a3 × 3 matrix. A1, a2, A3 constitute row driver circuits, each row driver circuit being constituted by multiple column driver circuits, i.e., C1, C2, C3. The crossing position or intersection connection position of each row driving circuit and each column driving circuit is an LED display unit (i.e., a light emitting device, numbered as D1-D9).
It should be understood that, based on the circuit with a matrix structure, the term "first sub-driving circuit 21" and "second sub-driving circuit 22" refers to a row driving circuit or a column driving circuit.
For a certain light emitting device, the column driving circuit where the light emitting device is located can output a column driving signal to the light emitting device at the corresponding position, and meanwhile, the row driving circuit where the light emitting device is located can output a row driving signal to the light emitting device, so that the light emitting device can be lighted at this time. That is, a certain light emitting device can be lighted up only by receiving the driving signals of the column driving circuit and the row driving circuit at the same time. With this, by the driving circuit of the matrix structure, the number of the light emitting devices 10 can be saved.
It should be noted that the row and column driving signals are typically different in voltage, etc., parameters, such as one high and the other low, when the light emitting device is lit.
Referring to fig. 2, the working principle of the present application is described again below with respect to the implementation of the matrix structure. In operation, when the column input is low and the row input is high, the LED devices at the staggered point of the columns and rows emit light. When in operation, a1 inputs a high when scanning the first row, and when a column needs to be lit then that column inputs a low otherwise it remains high. The row input changes to low after the first row has been scanned, at which time there is charge stored in the first row parasitic capacitance due to the circuit parasitic capacitance, i.e., in C1. When the second row is ready to start scanning, the corresponding high level is input at B2 according to the charge stored in the parasitic capacitor of the first row, so that the Q5 turns on the input charge (current) from the first row to the second row, and the input voltage of the second row can be reduced to a certain extent according to the actual circuit condition.
It should be understood that for the driving circuits of the matrix structure, for the row driving circuits, different row driving circuits may generate row driving signals successively at certain time intervals, and the row driving signals may be arranged in the order of the row driving circuits. For the column driving circuits, the different column driving circuits may generate the column driving signals sequentially at a certain time interval in the order of arrangement of the column driving circuits, thereby realizing that the light emitting devices 10 are sequentially lighted. Of course, the interval period here is controlled to a range imperceptible to the human eye, for example, on the order of milliseconds.
It is known to implement the row driving circuitry to generate the row driving signals sequentially, and the manner in which the column driving circuitry to generate the column driving signals sequentially may be controlled by a known chip.
It should be noted that the implementation effect of the present application is not dependent on the configuration of the circuit, i.e., the matrix structure listed above, which does not mean that the implementation manner of the non-matrix structure will impair the implementation effect of the present application. The matrix structure listed above is only based on the requirement of reducing the number of light emitting device arrangements.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The driving circuit provided by the embodiment of the present application is described in detail above, and a specific example is applied in the description to explain the principle and the implementation of the present application, and the description of the above embodiment is only used to help understanding the technical solution and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (10)
1. A driver circuit, comprising:
the first sub-driving circuit comprises a first input control module and a first capacitor, the first input control module is used for providing input voltage for the first light-emitting device, and the first capacitor is electrically connected with the first input control module; the second sub-driving circuit comprises a second input control module, and the second input control module is used for providing input voltage for the second light-emitting device;
the switch is connected between the first sub-driving circuit and the second sub-driving circuit and is configured to be switched off when the first sub-driving circuit drives the first light-emitting device, and the first capacitor is subjected to energy storage; and after the second sub-driving circuit drives the second light-emitting device, the second sub-driving circuit is conducted to provide input current for the second sub-driving circuit through the first capacitor.
2. A drive circuit as claimed in claim 1, characterized in that the switch is a bipolar diode.
3. The driving circuit of claim 1, wherein the second sub-driving circuit further comprises a second capacitor, the second capacitor being electrically connected to the second input control module.
4. The driver circuit of claim 1, wherein the first input control block comprises a first transistor electrically coupled to a first pole of the first light emitting device, a collector of the first transistor electrically coupled to the supply voltage, and an emitter of the first transistor electrically coupled to the first capacitor.
5. The driving circuit of claim 3, wherein the second input control module comprises a second transistor electrically coupled to a second pole of the second light emitting device, a collector of the second transistor being electrically coupled to the supply voltage, and an emitter of the second transistor being electrically coupled to the second capacitor.
6. The drive circuit of claim 4, wherein the emitter of the first transistor is electrically coupled to the first capacitor through a first resistor.
7. The drive circuit of claim 5, wherein the emitter of the second transistor is electrically coupled to the second capacitor through a second resistor.
8. The driving circuit of claim 1, wherein the first light emitting device is electrically disconnected from one end of the first input control module and the second light emitting device is electrically disconnected from one end of the second input control module for receiving the same power voltage to form a matrix structure.
9. A drive device characterized by being provided with a drive circuit as claimed in claim 1.
10. A display device characterized by having a drive device as claimed in claim 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111386028.XA CN114023255A (en) | 2021-11-22 | 2021-11-22 | Drive circuit, drive device, and display device |
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| CN202111386028.XA CN114023255A (en) | 2021-11-22 | 2021-11-22 | Drive circuit, drive device, and display device |
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