CN212411556U - Driving device and electronic apparatus - Google Patents
Driving device and electronic apparatus Download PDFInfo
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- CN212411556U CN212411556U CN202022261818.2U CN202022261818U CN212411556U CN 212411556 U CN212411556 U CN 212411556U CN 202022261818 U CN202022261818 U CN 202022261818U CN 212411556 U CN212411556 U CN 212411556U
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Abstract
The utility model relates to a drive arrangement and electronic equipment, the device includes that first voltage produces module, voltage adjustment module, first switch module, first electric capacity module, first transistor module and first light emitting module, wherein: the first voltage generating module is used for generating a first voltage; the first switch module is used for outputting a first voltage to a first end of the first capacitor module in a first time period; the voltage adjusting module is used for determining a second voltage according to the variation of the voltage of the first end of the first capacitor module and outputting the second voltage to the second end of the first capacitor module in a second time period; and the first transistor module is used for driving the first light-emitting module to emit light by utilizing the voltage of the first end of the first capacitor module. Through above device, the embodiment of the utility model provides a can compensate the adjustment to the electric leakage in the device to solve the scintillation problem of first light-emitting module.
Description
Technical Field
The utility model relates to a show technical field, especially relate to a drive arrangement and electronic equipment.
Background
With the continuous development of science and technology, people's standard of living is continuously improved, and various types of electronic equipment that possess the display function are more and more favored, however, display panel among the present electronic equipment, there is the scintillation problem that leads to because of the electric leakage problem of each device of display panel itself, and this has not only influenced user experience, still can shorten display panel's life-span.
SUMMERY OF THE UTILITY MODEL
Technical problem
In view of this, the technical problem to be solved by the present invention is how to solve the flicker problem existing in the display panel.
Solution scheme
In order to solve the above technical problem, according to the utility model discloses an embodiment provides a driving device, the device includes that first voltage produces module, voltage adjustment module, first switch module, first electric capacity module, first transistor module and first light emitting module, wherein:
the first voltage generation module is used for generating a first voltage;
the first switch module is electrically connected to the first voltage generation module and the first capacitor module, and is configured to output the first voltage to a first end of the first capacitor module at a first time period;
the voltage adjusting module is electrically connected to the second end of the first capacitor module, and is configured to determine a second voltage according to a variation of the voltage at the first end of the first capacitor module, and output the second voltage to the second end of the first capacitor module in a second time period, so as to set the voltage at the first end of the first capacitor module;
the first transistor module is electrically connected to the first end of the first capacitor module and the first light-emitting module, and is configured to drive the first light-emitting module to emit light by using a voltage at the first end of the first capacitor module.
For the above apparatus, in one possible implementation manner, the first voltage generating module includes:
the first voltage generating unit is used for generating the first voltage according to brightness information and a preset brightness voltage relationship, wherein the preset brightness voltage relationship comprises an incidence relationship between the brightness information and the voltage.
For the above apparatus, in one possible implementation manner, the voltage adjustment module includes:
the current sensing unit is used for determining sensing current according to the variation of the voltage of the first end of the first capacitor module;
and a first end of the resistance unit is electrically connected to the current sensing unit and a second end of the first capacitor module, and a second end of the resistance unit is grounded and used for determining the second voltage according to the sensing current and the resistance of the resistance unit.
For the above device, in one possible implementation manner, the current sensing unit includes a second voltage generation module, a second switch module, a second capacitor module, a second transistor module, a second light emitting module, an operational amplification module, and a third transistor module, wherein,
the second voltage generation module is used for generating a first voltage;
the second switch module is electrically connected to the second voltage generation module and the second capacitor module, and is configured to output the first voltage to a first end of the second capacitor module in a third time period;
the second transistor module is electrically connected to the first end of the second capacitor module and the second light-emitting module, and is configured to drive the second light-emitting module to emit light by using the voltage at the first end of the second capacitor module;
the operational amplification module is electrically connected to the second voltage generation module, the first end of the second capacitor module, and the third transistor module, and is configured to obtain a sensing voltage according to the first voltage and a voltage at the first end of the second capacitor module, where the sensing voltage is a variation of the voltage at the first end of the first capacitor module;
the third transistor module is electrically connected to the operational amplifier module, the first end of the resistor unit, and the second end of the first capacitor module, and is configured to generate the sensing current according to the sensing voltage.
For the above device, in a possible implementation manner, the sensing voltage includes a first sensing voltage and a second sensing voltage, the sensing current includes a first sensing current and a second sensing current, the operational amplification module includes a first operational amplifier and a second operational amplifier, the third transistor module includes a first sensing transistor and a second sensing transistor, the device further includes a third switch module, the third switch module includes a first sensing switch and a second sensing switch, wherein,
the positive input end of the first operational amplifier is used for inputting the first voltage, the negative input end of the first operational amplifier is used for inputting the first end voltage of the second capacitor module, and the output end of the first operational amplifier is electrically connected to the grid of the first sensing transistor and outputs the first sensing voltage; the drain of the first sensing transistor is used for receiving a power supply voltage, the source of the first sensing transistor is electrically connected to the first end of the first sensing switch and is used for outputting the first sensing current, the second end of the first sensing switch is electrically connected to the first end of the resistor unit and the second end of the first capacitor module,
the positive input end of the second operational amplifier is used for inputting the first voltage, the negative input end of the second operational amplifier is used for inputting the first end voltage of the second capacitor module, and the output end of the second operational amplifier is electrically connected to the grid of the second sensing transistor and outputs the second sensing voltage; the drain of the second sensing transistor is used for receiving a power supply voltage, the source of the second sensing transistor is electrically connected to the first end of the second sensing switch and used for outputting the second sensing current, and the second end of the second sensing switch is electrically connected to the first end of the resistor unit and the second end of the first capacitor module.
For the above device, in one possible implementation manner, the sensing voltage includes a first sensing voltage and a second sensing voltage, the sensing current includes a first sensing current and a second sensing current, the operational amplification module includes a first operational amplifier, and the third transistor module includes a first sensing transistor and a second sensing transistor, wherein,
the positive input end of the first operational amplifier is used for inputting the first voltage, the negative input end of the first operational amplifier is used for inputting the first end voltage of the second capacitor module, and the output end of the first operational amplifier is electrically connected to the grid of the first sensing transistor and outputs the first sensing voltage; the drain of the first sensing transistor is used for receiving a power supply voltage, and the source of the first sensing transistor is electrically connected to the first end of the resistor unit and the second end of the first capacitor module and used for outputting the first sensing current;
the output end of the first operational amplifier is electrically connected to the grid electrode of the second sensing transistor and outputs the second sensing voltage; the drain of the second sensing transistor is used for receiving a power supply voltage, and the source of the second sensing transistor is electrically connected to the first end of the resistor unit and the second end of the first capacitor module and is used for outputting the second sensing current.
For the above apparatus, in one possible implementation, the first sensing switch is configured to be turned on when the first sensing current is a positive current, and the second sensing switch is configured to be turned on when the second sensing current is a negative current.
For the above apparatus, in a possible implementation manner, the first switch module includes a first switch, a first end of the first switch is configured to receive the first voltage, and a second end of the first switch is electrically connected to the first end of the first capacitor module.
For the above apparatus, in one possible implementation, the first switch module is further configured to:
in a first time period, turning on the first switch to output the first voltage to the first end of the first capacitor module;
and opening the first switch in a second time period.
For the above apparatus, in a possible implementation manner, the second voltage generating module is a replica of the first voltage generating module, the second switching module is a replica of the first switching module, the second capacitance module is a replica of the first capacitance module, the second transistor module is a replica of the first transistor module, and the second light emitting module is a replica of the first light emitting module.
For the above apparatus, in one possible implementation, the first capacitance module includes:
a first capacitor, a first end of which is used as a first end of the first capacitor module and is electrically connected to the first switch module and the first transistor module, and a second end of which is used as a second end of the first capacitor module and is electrically connected to the voltage adjusting module.
For the above apparatus, in a possible implementation manner, the first transistor module includes a plurality of first transistor modules, a plurality of first capacitor modules, a plurality of first light emitting modules, a first switch module may include a plurality of first switches, and a first voltage generating module may generate a plurality of first voltages, where,
the voltage generation module is further used for outputting a plurality of first voltages, and each first voltage corresponds to each transistor module;
the voltage adjusting module is used for outputting the generated second voltage to the second end of each first capacitor module so as to compensate the voltage of the first end of each first capacitor module.
In one possible implementation, the light emitting module includes any one or more of LCD, LED, MiniLED, micro LED, OLED.
According to an aspect of the present invention, there is provided an electronic apparatus, including the driving device.
In one possible implementation, the electronic device includes a display, a smartphone, or a portable device.
Advantageous effects
Through above device, the embodiment of the utility model provides a can produce first voltage to export the first end of first electric capacity module with first voltage at first time quantum, and confirm the second voltage according to the change volume of the first end voltage of first electric capacity module, export the second end of first electric capacity module, set up the voltage of the first end of first electric capacity module, thereby compensate the adjustment to the electric leakage in the device, with the scintillation problem of solving first light-emitting module.
Other features and aspects of the present invention will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present invention and, together with the description, serve to explain the principles of the invention.
Fig. 1 shows a block diagram of a drive device according to an embodiment of the invention.
Fig. 2 shows a schematic view of a drive arrangement according to an embodiment of the invention.
Fig. 3 shows a schematic diagram of a voltage regulation module according to an embodiment of the present invention.
Fig. 4 shows a schematic view of a drive arrangement according to an embodiment of the invention.
Fig. 5 shows a schematic view of a drive arrangement according to an embodiment of the invention.
Detailed Description
Various exemplary embodiments, features and aspects of the present invention will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present invention. It will be understood by those skilled in the art that the present invention may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present invention.
Referring to fig. 1, fig. 1 is a block diagram of a driving device according to an embodiment of the present invention.
As shown in fig. 1, the apparatus includes a first voltage generating module 10, a first switch module 20, a first capacitor module 30, a voltage adjusting module 40, a first transistor module 50, and a first light emitting module 60, wherein:
the first voltage generating module 10 is configured to generate a first voltage;
the first switch module 20, electrically connected to the first voltage generating module 10 and the first capacitor module 30, is configured to output the first voltage to a first end of the first capacitor module 30 at a first time period;
the voltage adjusting module 40 is electrically connected to the second end of the first capacitor module 30, and configured to determine a second voltage according to a variation of the voltage at the first end of the first capacitor module 30, and output the second voltage to the second end of the first capacitor module 30 in a second time period, so as to set the voltage at the first end of the first capacitor module 30;
the first transistor module 50 is electrically connected to the first end of the first capacitor module 30 and the first light emitting module 60, and is configured to drive the first light emitting module 60 to emit light by using a voltage at the first end of the first capacitor module 30.
Through above device, the embodiment of the utility model provides a can produce first voltage to export the first end of first electric capacity module with first voltage at first time quantum, and confirm the second voltage according to the change volume of the first end voltage of first electric capacity module, export the second end of first electric capacity module, set up the voltage of the first end of first electric capacity module, thereby compensate the adjustment to the electric leakage in the device, with the scintillation problem of solving first light-emitting module.
The device of the embodiment of the present invention can be various electronic devices with display function, and is also called User Equipment (UE), Mobile Station (MS), Mobile Terminal (MT), etc., and is a device providing voice and/or data connectivity for users, for example, a handheld device with wireless connection function, a vehicle-mounted device, etc. Currently, some examples of terminals are: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palm top computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned driving (self), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in city (smart city), a wireless terminal in smart home (smart home), a wireless terminal in vehicle networking, and the like.
In one possible implementation manner, the Light Emitting module may include any one or more of an LCD (Liquid Crystal Display), an LED (Light Emitting Diode), a Mini LED (Mini Light Emitting Diode), a Micro LED (Micro Light Emitting Diode), and an OLED (Organic Light-Emitting Diode).
It should be noted that each module in the device according to the embodiment of the present invention may be implemented by a hardware circuit, and the following description exemplarily describes possible implementations of each module in the driving device.
Referring to fig. 2, fig. 2 is a schematic diagram illustrating a driving device according to an embodiment of the present invention.
In one possible implementation, as shown in fig. 2, the first voltage generating module 10 may include:
the first voltage generating unit 110 is configured to generate the first voltage Vin according to luminance information and a preset luminance voltage relationship, where the preset luminance voltage relationship includes an association relationship between the luminance information and a voltage.
In an example, the preset luminance relationship may be set in advance, for example, the relationship between luminance and voltage may be set according to the type of the display transistor included in the first light-emitting module, and different preset luminance-voltage relationships may be set for different first light-emitting modules, of course, the preset luminance relationship may be in a form of a table, or in other forms, and therefore, the embodiment of the present invention is not limited.
The embodiment of the utility model provides a do not restrict to specific luminance relation of predetermineeing, do not restrict yet to the type of first light-emitting module, technical personnel in the field can set up as required.
In one example, the first voltage generating unit may include a plurality of resistors connected in series, and the different first voltages may be determined by dividing the power supply voltage by the plurality of resistors.
Of course, the above description of the first voltage generating unit is exemplary, the present invention is not limited to the specific implementation of the first voltage generating unit, and a person skilled in the art can select voltage generating devices (e.g., AC/DC converting device, DC/DC converting device) in the related art to implement according to needs.
In one example, the first voltage generation module may include a storage unit (not shown) for storing a preset luminance relationship or other data generated by the respective modules of the driving apparatus.
The memory unit may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.
In one possible implementation, as shown in fig. 2, the first switch module 20 may include a first switch S1, a first end of the first switch S1 is configured to receive the first voltage Vin, and a second end of the first switch S1 is electrically connected to the first end of the first capacitor module 30.
In one possible implementation, the first switch module is further configured to:
in a first time period, turning on the first switch to output the first voltage to the first end of the first capacitor module;
and opening the first switch in a second time period.
In one example, the first time period may be set as needed, and the second time period may be a time period after the end of the timing of the duration of the first time period.
It should be noted that, in the driving apparatus, the amount of leakage of the capacitor module and the transistor module is positively correlated (proportional) to the duration of the first time period, and exemplarily, the variation of the voltage at the first end of the first capacitor module
The IOFF represents the magnitude of the leakage current, T represents the duration of the first time period, CS represents the capacitance of the first capacitance module, and the variation has a correlation with the duration.
When different first time periods of time duration are set, the magnitude of the electric leakage has different values, the second voltage generated by the voltage adjusting module also has different values, the second voltage and the magnitude of the electric leakage have a correlation relationship, and the second voltage and the first time period of time duration also have a correlation relationship.
In one possible implementation, as shown in fig. 2, the first capacitance module 30 may include:
a first capacitor C1, wherein a first end of the first capacitor C1 is electrically connected to the first switch module 20 and the first transistor module 50 as a first end of the first capacitor module 30, and a second end of the first capacitor C1 is electrically connected to the voltage adjusting module 40 as a second end of the first capacitor module 30.
In a possible embodiment, the first transistor module 50 may include at least one transistor, and the type of the transistor may be an NMOS transistor, a PMOS transistor, or the like.
The first transistor module 50 may serve as a driving stage of the first light emitting module 60 to drive the first light emitting module to emit light.
In a possible embodiment, the first capacitor module and the first transistor module in the driving apparatus may have a leakage phenomenon, for example, if the first transistor module is a PMOS transistor, the PMOS transistor leakage may cause the voltage at the first terminal of the first capacitor module to increase; assuming that the first transistor module is an NMOS transistor, the voltage at the first terminal of the first capacitor module is reduced due to the leakage of the NMOS transistor; the electric leakage of the capacitor in the first capacitor module can lead to the voltage reduction of the first capacitor module, on the one hand, if the electric leakage leads to the first end voltage reduction of the first capacitor module, can lead to the loss to the first voltage that the first voltage produces the unit production, drive the light emitting module after still opening the transistor module with first voltage, can cause the luminance not enough, the light emitting module shows unusually, on the other hand, if the electric leakage leads to the first end voltage increase of the first capacitor module, the light emitting module can send the luminance that is higher than expectation, arouse the scintillation of light emitting module, more serious can lead to the light emitting module to damage, influence user experience.
In one possible implementation, as shown in fig. 2, the voltage adjustment module 40 may include:
a current sensing unit 410 for determining a sensing current according to a variation of the voltage of the first terminal of the first capacitance module 30;
a first end of the resistor unit 420 is electrically connected to the current sensing unit 410 and the second end of the first capacitor module 30, and a second end of the resistor unit 420 is grounded, and is configured to determine the second voltage according to the sensing current and the resistance of the resistor unit 420.
The embodiment of the utility model provides a can utilize current sensing unit basis the sensing current is confirmed to the variation of the voltage of the first end of first electric capacity module to utilize the resistance unit basis the sensing current reaches the resistance of resistance unit is confirmed the second voltage, thereby is used for compensating the electric leakage.
Referring to fig. 3, fig. 3 is a schematic diagram illustrating a voltage adjustment module according to an embodiment of the present invention.
In one possible implementation, as shown in fig. 3, the current sensing unit 410 may include a second voltage generating module 81, a second switching module 82, a second capacitor module 83, a second transistor module 84, a second light emitting module 85, an operational amplifying module 86, and a third transistor module 87, wherein,
the second voltage generating module 81 is used for generating a first voltage Vin;
the second switch module 82, electrically connected to the second voltage generating module 81 and the second capacitor module 83, is configured to output the first voltage to a first end of the second capacitor module 83 in a third time period;
the second transistor module 84 is electrically connected to the first end of the second capacitor module 83 and the second light emitting module 85, and is configured to drive the second light emitting module 85 to emit light by using the voltage at the first end of the second capacitor module 83;
the operational amplifier module 86, electrically connected to the second voltage generator module 81, the first end of the second capacitor module 83 and the third transistor module 87, is configured to obtain a sensing voltage according to the first voltage Vin and a voltage at the first end of the second capacitor module 83, where the sensing voltage is a variation of the voltage at the first end of the first capacitor module 30;
the third transistor module 87 is electrically connected to the operational amplifier module 86, the first end of the resistor unit 420, and the second end of the first capacitor module 30, and is configured to generate the sensing current according to the sensing voltage.
In a possible implementation manner, the second voltage generating module is a replica of the first voltage generating module, the second switching module is a replica of the first switching module, the second capacitance module is a replica of the first capacitance module, the second transistor module is a replica of the first transistor module, and the second light emitting module is a replica of the first light emitting module.
The embodiment of the utility model provides a through the first voltage with among the drive arrangement produce the module, first switch module, first capacitor module, first transistor module and first luminous module duplicate, obtain second voltage and produce the module, second switch module, second capacitor module, second transistor module, second luminous module, in order to acquire the variable quantity of the voltage of the first end of first capacitor module, thereby realize the sensing to the electric leakage, obtain corresponding second voltage in order to compensate to the electric leakage, can solve luminous module's scintillation problem effectively.
The "duplication" of each module according to the embodiments of the present invention may refer to mass production of each module by industrial manufacturing, for example, in manufacturing, the same or similar modules are produced by setting the same parameters, using the same raw materials, and using the same manufacturing equipment to perform the same process.
Based on the above setting, the embodiment of the present invention can utilize the second voltage generation module in the voltage adjustment module to generate the first voltage, and output the first voltage to the first end of the second capacitor module through the second switch module in the third time period (the same as the time length of the first time period), when the timing of the third time period is over, the second switch module can disconnect the electrical connection relationship between the second voltage generation module and the second capacitor module, at this time, the electric leakage of the second capacitor module and/or the third transistor module affects the voltage of the first end of the second capacitor module, the operational amplification module obtains the voltage of the first end of the second capacitor module and the first voltage, and can obtain the variation of the voltage of the first end of the second capacitor module, and the variation is equivalent to the variation of the voltage of the first end of the first capacitor module.
In one possible implementation, the sensing voltage may include a first sensing voltage and a second sensing voltage, and the sensing current may include a first sensing current and a second sensing current.
In one possible implementation, as shown in fig. 3, the operational amplification module 86 may include a first operational amplifier a1 and a second operational amplifier a2, the third transistor module 87 may include a first sense transistor Q1 and a second sense transistor Q2, the apparatus may further include a third switch module 88, which may include a first sense switch S2 and a second sense switch S3, wherein,
the positive input terminal of the first operational amplifier a1 is used for inputting the first voltage Vin, the negative input terminal of the first operational amplifier a1 is used for inputting the first terminal voltage of the second capacitor module 83, and the output terminal of the first operational amplifier a1 is electrically connected to the gate of the first sense transistor Q1 and outputs the first sense voltage; the drain of the first sensing transistor Q1 is used for receiving a power voltage VDD, the source of the first sensing transistor Q1 is electrically connected to the first terminal of the first sensing switch S2 for outputting the first sensing current, the second terminal of the first sensing switch S2 is electrically connected to the first terminal (for example, the first terminal of the resistor R1) of the resistor unit 420 (for example, the resistor unit 420 includes the resistor R1) and the second terminal of the first capacitor module 30,
the positive input terminal of the second operational amplifier a2 is used for inputting the first voltage Vin, the negative input terminal of the second operational amplifier a2 is used for inputting the first terminal voltage of the second capacitor module 83, and the output terminal of the second operational amplifier a2 is electrically connected to the gate of the second sense transistor Q2 and outputs the second sense voltage; the drain of the second sensing transistor Q2 is configured to receive a power supply voltage NVDD, the source of the second sensing transistor Q2 is electrically connected to the first terminal of the second sensing switch S3 for outputting the second sensing current, and the second terminal of the second sensing switch S3 is electrically connected to the first terminal (for example, the first terminal of the resistor R1) of the resistor unit 420 (for example, the resistor unit 420 includes the resistor R1) and the second terminal of the first capacitor module 30.
In one example, the first sense transistor Q1 may be a PMOS transistor.
In one example, the second sense transistor Q2 may be an NMOS transistor.
In one possible implementation, the first sensing switch is configured to be turned on when the first sensing current is a positive current, and the second sensing switch is configured to be turned on when the second sensing current is a negative current.
In one example, when the transistor type in the first transistor module is a PMOS transistor, the first transistor module leaks current to the first capacitance module, in which case the voltage at the first terminal of the first capacitance module rises. Assuming that the first voltage is 5V, the holding time is 1 second, the voltage variation Δ V of the first end of the first capacitor module is 0.5V, and the voltage of the first end of the first capacitor module is 5.5V; the second sensing transistor Q2 can obtain a sensing current of-5 μ a when the holding time is 1 second, since the second sensing current is a negative value, the second sensing switch S3 is turned on at this time, and outputs the second sensing current to the second end of the resistance unit, assuming that the resistance of the resistance unit is 0.1M Ω, the second voltage obtained by the voltage adjustment module is-0.5V, and the second voltage is output to the second end of the first capacitance module, the voltage of the first end of the first capacitance module can be reduced to 5V, thereby realizing compensation of leakage current and solving the flicker problem.
In one example, when the transistor type in the first transistor module is an NMOS transistor, the first capacitor module leaks current to the first transistor module, and the first capacitor module itself also has a leakage phenomenon, in which case the voltage of the first terminal of the first capacitor module is reduced. Assuming that the first voltage is 5V, the holding time is 1 second, the voltage variation Δ V of the first end of the first capacitor module is-0.5V, and the voltage of the first end of the first capacitor module is 4.5V; the first sensing transistor Q1 can obtain a sensing current of 5 μ a when the holding time is 1 second, since the first sensing current is a positive value, the first sensing switch S1 is turned on at this time, and outputs the first sensing current to the second end of the resistance unit, assuming that the resistance of the resistance unit is 0.1M Ω, the second voltage obtained by the voltage adjustment module is 0.5V, and the second voltage is output to the second end of the first capacitance module, the voltage of the first end of the first capacitance module can be raised to 5V, thereby realizing compensation of leakage current to improve the flicker phenomenon.
The third switch module is used to output the sensing current to the first end of the resistor unit, but the present invention is not limited thereto, since the first sensing transistor and the second sensing transistor are different types of transistors, they are not turned on at the same time, in which case the third switch module can be removed, which will be exemplarily described below.
Referring to fig. 4, fig. 4 is a schematic diagram illustrating a driving device according to an embodiment of the present invention.
In a possible implementation manner, as shown in fig. 4, the operational amplifier module may only include the first operational amplifier a1, but not include the second operational amplifier a2 shown in fig. 3, the present invention may also realize outputting the sensing voltage to two sensing transistors through one operational amplifier, so as to obtain the sensing current,
in one example, a positive input terminal of the first operational amplifier a1 is used for inputting the first voltage Vin, a negative input terminal of the first operational amplifier a1 is used for inputting the first terminal voltage of the second capacitor module, and an output terminal of the first operational amplifier a1 is electrically connected to the gate of the first sense transistor Q1 and outputs the first sense voltage; the drain of the first sensing transistor Q1 is used for receiving a power voltage VDD, and the source of the first sensing transistor Q1 is electrically connected to the first end of the resistor unit 420 and the second end of the first capacitor module 30, and is used for outputting the first sensing current.
In one example, if the voltage of the first terminal of the first capacitor module decreases due to the leakage phenomenon, the first operational amplifier a1 senses a positive voltage variation, and the first sensing transistor is turned on, the second sensing transistor is turned off, and the first sensing transistor outputs a positive first sensing current to the first terminal of the resistor unit 420.
In one example, the output terminal of the first operational amplifier a1 is electrically connected to the gate of the second sense transistor Q2 and outputs the second sense voltage; the drain of the second sensing transistor Q2 is configured to receive a power supply voltage NVDD, and the source of the second sensing transistor is electrically connected to the first end of the resistor unit and the second end of the first capacitor module, and configured to output the second sensing current.
In one example, if the voltage at the first end of the first capacitor module increases due to the leakage phenomenon, the first operational amplifier a1 will sense a negative voltage variation, and the second sensing transistor is turned on, the first sensing transistor is turned off, and the second sensing transistor outputs a negative second sensing current to the first end of the resistor unit 420.
Referring to fig. 5, fig. 5 is a schematic diagram illustrating a driving device according to an embodiment of the present invention.
In one possible embodiment, as shown in fig. 5, the apparatus may include a plurality of first transistor modules 50, a plurality of first capacitor modules 30, a plurality of first light emitting modules 60, the first switch module 20 may include a plurality of first switches (S11 to S1K, K is an integer greater than 1), the first voltage generating module 10 may generate a plurality of first voltages (Vin1 to VinkK),
wherein the voltage generation module is further configured to output a plurality of first voltages, each first voltage corresponding to each transistor module;
the voltage adjusting module 40 may output the generated second voltage to the second terminal of each first capacitor module 30 to compensate for the voltage of the first terminal of each first capacitor module 30.
For the connection relationship among the voltage generation module, the switch module, the capacitor module, and other modules in the above apparatus, please refer to the foregoing description, which is not repeated herein.
Through the setting, the embodiment of the utility model provides a can increase drive arrangement's suitable scope, carry out the voltage compensation of adaptability to a plurality of transistors on the display panel, improve each light emitting module's scintillation problem to improve whole display panel's display effect.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (15)
1. A driving device is characterized in that the device comprises a first voltage generation module, a voltage adjustment module, a first switch module, a first capacitor module, a first transistor module and a first light-emitting module, wherein:
the first voltage generation module is used for generating a first voltage;
the first switch module is electrically connected to the first voltage generation module and the first capacitor module, and is configured to output the first voltage to a first end of the first capacitor module at a first time period;
the voltage adjusting module is electrically connected to the second end of the first capacitor module, and is configured to determine a second voltage according to a variation of the voltage at the first end of the first capacitor module, and output the second voltage to the second end of the first capacitor module in a second time period, so as to set the voltage at the first end of the first capacitor module;
the first transistor module is electrically connected to the first end of the first capacitor module and the first light-emitting module, and is configured to drive the first light-emitting module to emit light by using a voltage at the first end of the first capacitor module.
2. The apparatus of claim 1, wherein the first voltage generation module comprises:
the first voltage generating unit is used for generating the first voltage according to brightness information and a preset brightness voltage relationship, wherein the preset brightness voltage relationship comprises an incidence relationship between the brightness information and the voltage.
3. The apparatus of claim 1, wherein the voltage adjustment module comprises:
the current sensing unit is used for determining sensing current according to the variation of the voltage of the first end of the first capacitor module;
and a first end of the resistance unit is electrically connected to the current sensing unit and a second end of the first capacitor module, and a second end of the resistance unit is grounded and used for determining the second voltage according to the sensing current and the resistance of the resistance unit.
4. The apparatus of claim 3, wherein the current sensing unit comprises a second voltage generation module, a second switch module, a second capacitor module, a second transistor module, a second light emitting module, an operational amplification module, a third transistor module, wherein,
the second voltage generation module is used for generating a first voltage;
the second switch module is electrically connected to the second voltage generation module and the second capacitor module, and is configured to output the first voltage to a first end of the second capacitor module in a third time period;
the second transistor module is electrically connected to the first end of the second capacitor module and the second light-emitting module, and is configured to drive the second light-emitting module to emit light by using the voltage at the first end of the second capacitor module;
the operational amplification module is electrically connected to the second voltage generation module, the first end of the second capacitor module, and the third transistor module, and is configured to obtain a sensing voltage according to the first voltage and a voltage at the first end of the second capacitor module, where the sensing voltage is a variation of the voltage at the first end of the first capacitor module;
the third transistor module is electrically connected to the operational amplifier module, the first end of the resistor unit, and the second end of the first capacitor module, and is configured to generate the sensing current according to the sensing voltage.
5. The apparatus of claim 4, wherein the sense voltage comprises a first sense voltage, a second sense voltage, the sense current comprises a first sense current, a second sense current, the operational amplification module comprises a first operational amplifier and a second operational amplifier, the third transistor module comprises a first sense transistor and a second sense transistor, the apparatus further comprises a third switch module comprising a first sense switch, a second sense switch, wherein,
the positive input end of the first operational amplifier is used for inputting the first voltage, the negative input end of the first operational amplifier is used for inputting the first end voltage of the second capacitor module, and the output end of the first operational amplifier is electrically connected to the grid of the first sensing transistor and outputs the first sensing voltage; the drain of the first sensing transistor is used for receiving a power supply voltage, the source of the first sensing transistor is electrically connected to the first end of the first sensing switch and is used for outputting the first sensing current, the second end of the first sensing switch is electrically connected to the first end of the resistor unit and the second end of the first capacitor module,
the positive input end of the second operational amplifier is used for inputting the first voltage, the negative input end of the second operational amplifier is used for inputting the first end voltage of the second capacitor module, and the output end of the second operational amplifier is electrically connected to the grid of the second sensing transistor and outputs the second sensing voltage; the drain of the second sensing transistor is used for receiving a power supply voltage, the source of the second sensing transistor is electrically connected to the first end of the second sensing switch and used for outputting the second sensing current, and the second end of the second sensing switch is electrically connected to the first end of the resistor unit and the second end of the first capacitor module.
6. The apparatus of claim 4, wherein the sense voltage comprises a first sense voltage, a second sense voltage, the sense current comprises a first sense current, a second sense current, the operational amplification module comprises a first operational amplifier, the third transistor module comprises a first sense transistor and a second sense transistor, wherein,
the positive input end of the first operational amplifier is used for inputting the first voltage, the negative input end of the first operational amplifier is used for inputting the first end voltage of the second capacitor module, and the output end of the first operational amplifier is electrically connected to the grid of the first sensing transistor and outputs the first sensing voltage; the drain of the first sensing transistor is used for receiving a power supply voltage, and the source of the first sensing transistor is electrically connected to the first end of the resistor unit and the second end of the first capacitor module and used for outputting the first sensing current;
the output end of the first operational amplifier is electrically connected to the grid electrode of the second sensing transistor and outputs the second sensing voltage; the drain of the second sensing transistor is used for receiving a power supply voltage, and the source of the second sensing transistor is electrically connected to the first end of the resistor unit and the second end of the first capacitor module and is used for outputting the second sensing current.
7. The apparatus of claim 5 or 6, wherein the first sensing switch is configured to conduct when the first sensing current is a positive current, and wherein the second sensing switch is configured to conduct when the second sensing current is a negative current.
8. The apparatus of claim 1, wherein the first switch module comprises a first switch, a first end of the first switch is configured to receive the first voltage, and a second end of the first switch is electrically connected to the first end of the first capacitor module.
9. The apparatus of claim 8, wherein the first switch module is further configured to:
in a first time period, turning on the first switch to output the first voltage to the first end of the first capacitor module;
and opening the first switch in a second time period.
10. The apparatus of claim 4, wherein the second voltage generating module is a replica of the first voltage generating module, the second switching module is a replica of the first switching module, the second capacitive module is a replica of the first capacitive module, the second transistor module is a replica of the first transistor module, and the second light emitting module is a replica of the first light emitting module.
11. The apparatus of claim 1, wherein the first capacitive module comprises:
a first capacitor, a first end of which is used as a first end of the first capacitor module and is electrically connected to the first switch module and the first transistor module, and a second end of which is used as a second end of the first capacitor module and is electrically connected to the voltage adjusting module.
12. The apparatus of claim 1, wherein the first transistor module comprises a plurality of first transistor modules, a plurality of first capacitor modules, a plurality of first light emitting modules, wherein the first switch module comprises a plurality of first switches, wherein the first voltage generating module generates a plurality of first voltages, and wherein,
the voltage generation module is further used for outputting a plurality of first voltages, and each first voltage corresponds to each transistor module;
the voltage adjusting module is used for outputting the generated second voltage to the second end of each first capacitor module so as to compensate the voltage of the first end of each first capacitor module.
13. The device of claim 1, wherein the light emitting module comprises any one or more of LCD, LED, MiniLED, micro LED, OLED.
14. An electronic device, characterized in that the electronic device comprises a driving apparatus according to any one of claims 1 to 13.
15. The electronic device of claim 14, wherein the electronic device comprises a display, a smartphone, or a portable device.
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