CN114550659B - Data voltage supply circuit, module, data driver and display device - Google Patents

Data voltage supply circuit, module, data driver and display device Download PDF

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Publication number
CN114550659B
CN114550659B CN202210301442.4A CN202210301442A CN114550659B CN 114550659 B CN114550659 B CN 114550659B CN 202210301442 A CN202210301442 A CN 202210301442A CN 114550659 B CN114550659 B CN 114550659B
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CN
China
Prior art keywords
data voltage
switch
output end
electrically connected
amplifier
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CN202210301442.4A
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Chinese (zh)
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CN114550659A (en
Inventor
胡元洲
廖成浩
侯帅
吴国强
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BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
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Priority to CN202210301442.4A priority Critical patent/CN114550659B/en
Publication of CN114550659A publication Critical patent/CN114550659A/en
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Classifications

    • 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]
    • G09G3/3208—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] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—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] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3258—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] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the voltage across the light-emitting element
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0291—Details of output amplifiers or buffers arranged for use in a driving circuit
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0209—Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display

Abstract

The invention provides a data voltage supply circuit, a module, a data driver and a display device. A data voltage supply circuit for supplying a data voltage to a data voltage output terminal, the data voltage supply circuit including an amplifier and a switching circuit; the amplifier is electrically connected with the input end of the switch circuit and is used for receiving the data voltage, amplifying the data voltage to obtain an amplified data voltage and providing the amplified data voltage to the input end of the switch circuit; the switch circuit is respectively and electrically connected with the control end and at least two data voltage output ends and is used for controlling the communication between the input end of the switch circuit and at least one of the at least two data voltage output ends under the control of the control signal provided by the control end. The invention can ensure the stability of the data voltage output by the data voltage supply circuit through the data voltage output end.

Description

Data voltage supply circuit, module, data driver and display device
Technical Field
The present invention relates to the field of data voltage providing technologies, and in particular, to a data voltage providing circuit, a module, a data driver, and a display device.
Background
In OLED (organic light emitting diode) display, display problems such as water lines and transverse waves often occur, and analysis of the display problems is mostly that an internal driving circuit of a DIC (Drive Integrated Circuit, driving integrated circuit) is complex, and a data voltage supply circuit in a data driver is susceptible to crosstalk of the internal circuit or disturbance of external voltage.
Disclosure of Invention
The invention mainly aims to provide a data voltage supply circuit, a module, a data driver and a display device, and solves the problem that the data voltage supply circuit in the data driver is easily influenced by internal circuit crosstalk or external voltage disturbance in the prior art, so that poor display is caused.
In order to achieve the above object, an embodiment of the present invention provides a data voltage supply circuit for supplying a data voltage to a data voltage output terminal, the data voltage supply circuit including an amplifier and a switching circuit;
the amplifier is electrically connected with the input end of the switch circuit and is used for receiving the data voltage, amplifying the data voltage to obtain an amplified data voltage and providing the amplified data voltage to the input end of the switch circuit;
The switch circuit is respectively and electrically connected with the control end and at least two data voltage output ends and is used for controlling the communication between the input end of the switch circuit and at least one of the at least two data voltage output ends under the control of the control signal provided by the control end.
Optionally, the switch circuit is electrically connected with the M data voltage output terminals; the switching circuit comprises M switches; m is an integer greater than 1;
the control end of the mth switch is electrically connected with the mth control end, the first end of the mth switch is electrically connected with the input end of the switch circuit, and the second end of the mth switch is electrically connected with the mth data voltage output end; the mth switch is used for controlling the connection or disconnection between the input end of the switch circuit and the mth data voltage output end under the control of the mth control signal provided by the mth control end;
m is a positive integer less than or equal to M.
Optionally, the data voltage supply circuit according to at least one embodiment of the present invention further includes M resistors;
the second end of the mth switch is electrically connected with the mth data voltage output end through an mth resistor.
The embodiment of the invention also provides a data voltage providing module which comprises at least one data voltage providing unit, wherein the data voltage providing unit comprises a plurality of data voltage providing circuits.
Optionally, the data voltage providing module according to at least one embodiment of the present invention further includes a plurality of memory cells; the data voltage supply unit includes a first data voltage supply circuit, a second data voltage supply circuit, a third data voltage supply circuit, and a fourth data voltage supply circuit;
the first storage unit is electrically connected with the first data voltage supply circuit and is used for storing data voltages corresponding to a first color and supplying the data voltages corresponding to the first color to the first data voltage supply circuit;
the first data voltage supply circuit is electrically connected with the first data voltage output end and the third data voltage output end respectively, and is used for amplifying the data voltage corresponding to the first color to obtain a first amplified data voltage and controlling the first amplified data voltage to be supplied to at least one of the first data voltage output end and the third data voltage output end;
the second memory cell is electrically connected with the second data voltage supply circuit and is used for storing a first data voltage corresponding to a second color and supplying the first data voltage corresponding to the second color to the second data voltage supply circuit;
The second data voltage supply circuit is electrically connected with the second data voltage output end and the fourth data voltage output end respectively, and is used for amplifying the first data voltage corresponding to the second color to obtain a second amplified data voltage, and controlling the second amplified data voltage to be supplied to at least one of the second data voltage output end and the fourth data voltage output end;
a third memory cell electrically connected to the third data voltage supply circuit for storing a data voltage corresponding to a third color and supplying the data voltage corresponding to the third color to the third data voltage supply circuit;
the third data voltage supply circuit is electrically connected with the first data voltage output end and the third data voltage output end respectively, and is used for amplifying the data voltage corresponding to the third color to obtain a third amplified data voltage, and controlling the third amplified data voltage to be supplied to at least one of the first data voltage output end and the third data voltage output end;
a fourth memory cell electrically connected to the fourth data voltage supply circuit for storing a second data voltage corresponding to a second color and supplying the second data voltage corresponding to the second color to the fourth data voltage supply circuit;
The fourth data voltage supply circuit is electrically connected with the second data voltage output end and the fourth data voltage output end respectively, and is used for amplifying the second data voltage corresponding to the second color to obtain a fourth amplified data voltage, and controlling the fourth amplified data voltage to be supplied to at least one of the second data voltage output end and the fourth data voltage output end.
Optionally, the first data voltage providing circuit includes a first amplifier and a first switching circuit; the first switch circuit comprises a first switch and a second switch;
the input end of the first amplifier is electrically connected with the first storage unit, the output end of the first amplifier is respectively electrically connected with the first end of the first switch and the first end of the second switch, the first amplifier is used for receiving the data voltage corresponding to the first color, amplifying the data voltage corresponding to the first color, and obtaining and outputting a first amplified data voltage through the output end of the first amplifier;
the control end of the first switch is electrically connected with the first control end, the second end of the first switch is electrically connected with the first data voltage output end, and the first switch is used for controlling the connection or disconnection between the output end of the first amplifier and the first data voltage output end under the control of a first control signal provided by the first control end;
The control end of the second switch is electrically connected with the second control end, the second end of the second switch is electrically connected with the third data voltage output end, and the second switch is used for controlling the connection or disconnection between the output end of the first amplifier and the third data voltage output end under the control of a second control signal provided by the second control end.
Optionally, the second data voltage providing circuit includes a second amplifier and a second switching circuit; the second switching circuit comprises a third switch and a fourth switch;
the input end of the second amplifier is electrically connected with the second storage unit, the output end of the second amplifier is electrically connected with the first end of the second switch and the second end of the second switch respectively, the second amplifier is used for receiving the first data voltage corresponding to the second color, amplifying the first data voltage corresponding to the second color, and obtaining and outputting second amplified data voltage through the output end of the second amplifier;
the control end of the third switch is electrically connected with a third control end, the second end of the third switch is electrically connected with a second data voltage output end, and the third switch is used for controlling the connection or disconnection between the output end of the second amplifier and the second data voltage output end under the control of a third control signal provided by the third control end;
The control end of the fourth switch is electrically connected with the fourth control end, the second end of the fourth switch is electrically connected with the fourth data voltage output end, and the fourth switch is used for controlling the connection or disconnection between the output end of the second amplifier and the fourth data voltage output end under the control of a fourth control signal provided by the fourth control end.
Optionally, the third data voltage providing circuit includes a third amplifier and a third switching circuit; the third switching circuit comprises a fifth switch and a sixth switch;
the input end of the third amplifier is electrically connected with the third storage unit, the output end of the third amplifier is respectively electrically connected with the first end of the fifth switch and the first end of the sixth switch, and the third amplifier is used for receiving the data voltage corresponding to the third color, amplifying the data voltage corresponding to the third color, obtaining and outputting a third amplified data voltage through the output end of the third amplifier;
the control end of the fifth switch is electrically connected with the fifth control end, the second end of the fifth switch is electrically connected with the first data voltage output end, and the fifth switch is used for controlling the connection or disconnection between the output end of the third amplifier and the first data voltage output end under the control of a fifth control signal provided by the fifth control end;
The control end of the sixth switch is electrically connected with the sixth control end, the second end of the sixth switch is electrically connected with the third data voltage output end, and the sixth switch is used for controlling the connection or disconnection between the output end of the third amplifier and the third data voltage output end under the control of a sixth control signal provided by the sixth control end.
Optionally, the fourth data voltage providing circuit includes a fourth amplifier and a fourth switch circuit; the fourth switch circuit comprises a seventh switch and an eighth switch;
the input end of the fourth amplifier is electrically connected with the fourth storage unit, the output end of the fourth amplifier is electrically connected with the first end of the seventh switch and the second end of the eighth switch respectively, the fourth amplifier is used for receiving the second data voltage corresponding to the second color, amplifying the second data voltage corresponding to the second color, and obtaining and outputting a fourth amplified data voltage through the output end of the fourth amplifier;
the control end of the seventh switch is electrically connected with a seventh control end, the second end of the seventh switch is electrically connected with a second data voltage output end, and the seventh switch is used for controlling the connection or disconnection between the output end of the fourth amplifier and the second data voltage output end under the control of a seventh control signal provided by the seventh control end;
The control end of the eighth switch is electrically connected with the eighth control end, the second end of the eighth switch is electrically connected with the fourth data voltage output end, and the eighth switch is used for controlling the connection or disconnection between the output end of the fourth amplifier and the fourth data voltage output end under the control of an eighth control signal provided by the eighth control end.
The embodiment of the invention also provides a data driver, which comprises the data voltage providing module;
the data driver further comprises a gamma binding point voltage generating circuit and a data voltage generating circuit, wherein the gamma binding point voltage generating circuit is used for generating a plurality of gamma binding point voltages;
the data voltage generating circuit is used for obtaining data voltages corresponding to preset gray scales according to the gamma binding point voltages and providing the data voltages to the data voltage providing module.
Optionally, the gamma binding point voltage generating circuit comprises a first voltage follower, a second voltage follower and a generating sub-circuit; the first voltage follower comprises a first follower amplifier, and the second voltage follower comprises a second follower amplifier;
the non-inverting input end of the first follower amplifier is connected with a first input gamma reference voltage, the inverting input end of the first follower amplifier is electrically connected with the output end of the first follower amplifier, the output end of the first follower amplifier is electrically connected with the generation sub-circuit, the first follower amplifier is used for obtaining a first output gamma reference voltage according to the first input gamma reference voltage, and the voltage value of the first input gamma reference voltage is equal to the voltage value of the first output gamma reference voltage;
The non-inverting input end of the second following amplifier is connected with a second input gamma reference voltage, the inverting input end of the second following amplifier is electrically connected with the output end of the second following amplifier, the output end of the second following amplifier is electrically connected with the generating sub-circuit, the second following amplifier is used for obtaining a second output gamma reference voltage according to the second input gamma reference voltage, and the voltage value of the second input gamma reference voltage is equal to the voltage value of the second output gamma reference voltage;
the generation sub-circuit is used for generating a plurality of gamma binding point voltages according to the first output gamma reference voltage and the second output gamma reference voltage.
The data voltage supply circuit, the module, the data driver and the display device can ensure the stability of the data voltage output by the data voltage supply circuit through the data voltage output end.
Drawings
Fig. 1 is a block diagram of a data voltage supply circuit according to an embodiment of the present invention;
FIG. 2 is a block diagram of a data voltage providing circuit according to at least one embodiment of the present invention;
FIG. 3 is a block diagram of a data voltage providing module according to at least one embodiment of the present invention;
FIG. 4 is a circuit diagram of a data voltage providing module according to at least one embodiment of the invention;
FIG. 5 is a timing diagram illustrating operation of at least one embodiment of the data voltage providing module shown in FIG. 4 according to the present invention;
FIG. 6 is a schematic diagram illustrating a first operating state of a data voltage providing module according to at least one embodiment of the present invention;
FIG. 7 is a schematic diagram illustrating a second operating state of the data voltage providing module according to at least one embodiment of the present invention;
FIG. 8 is a schematic diagram illustrating a third operating state of the data voltage providing module according to at least one embodiment of the present invention;
FIG. 9 is a block diagram of at least one embodiment of a gamma binding point voltage generating circuit in a data driver according to an embodiment of the present invention;
FIG. 10 is a circuit diagram of at least one embodiment of the gamma binding point voltage generation circuit;
FIG. 11 is a circuit diagram of at least one embodiment of the gamma binding point voltage generation circuit.
Detailed Description
The following description of the embodiments of the present invention 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 invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The transistors used in all embodiments of the present invention may be transistors, thin film transistors or field effect transistors or other devices having the same characteristics. In the embodiment of the invention, in order to distinguish the two poles of the transistor except the control pole, one pole is called a first pole, and the other pole is called a second pole.
In actual operation, when the transistor is a thin film transistor or a field effect transistor, the first electrode may be a drain electrode, and the second electrode may be a source electrode; alternatively, the first pole may be a source and the second pole may be a drain.
The data voltage supply circuit is used for supplying data voltage to the data voltage output end and comprises an amplifier and a switch circuit;
the amplifier is electrically connected with the input end of the switch circuit and is used for receiving the data voltage, amplifying the data voltage to obtain an amplified data voltage and providing the amplified data voltage to the input end of the switch circuit 12;
the switch circuit is respectively and electrically connected with the control end and at least two data voltage output ends and is used for controlling the communication between the input end of the switch circuit and at least one of the at least two data voltage output ends under the control of the control signal provided by the control end.
In the data voltage providing circuit of the embodiment of the invention, the amplifier is arranged at the front end of the switching circuit, the data voltage output end is connected with the amplifier after passing through the switching circuit, and the influence of at least half external interference can be reduced by the cooperation of the switching circuit, so that the working stability of the amplifier can be better ensured, and the stability of the data voltage output by the data voltage providing circuit through the data voltage output end is ensured.
The switching circuit is described below as being electrically connected to two data voltage outputs.
The data voltage supply circuit according to the embodiment of the present invention is configured to supply a data voltage to a data voltage output terminal, as shown in fig. 1, and includes an amplifier Amp and a switch circuit 10;
the output end of the amplifier Amp is electrically connected with the input end of the switch circuit 10, and is used for receiving a data voltage Vdata through the input end of the amplifier Amp, amplifying the data voltage Vdata to obtain an amplified data voltage, and providing the amplified data voltage to the input end of the switch circuit 10;
the switch circuit 10 is electrically connected to the control terminal EN, the first data voltage output terminal Sout1, and the second data voltage output terminal Sout2, respectively, and is configured to control the communication between the input terminal of the switch circuit 12 and at least one of the first data voltage output terminal Sout1 and the second data voltage output terminal Sout2 under the control of the control signal provided by the control terminal EN.
In the data voltage providing circuit of the embodiment of the invention, the amplifier is arranged at the front end of the switching circuit, the data voltage output end is connected with the amplifier after passing through the switching circuit, and the influence of at least half external interference can be reduced by the cooperation of the switching circuit, so that the working stability of the amplifier can be better ensured, and the stability of the data voltage output by the data voltage providing circuit through the data voltage output end is ensured.
In at least one embodiment of the present invention, the switching circuit is electrically connected to the M data voltage output terminals; the switching circuit comprises M switches; m is an integer greater than 1;
the control end of the mth switch is electrically connected with the mth control end, the first end of the mth switch is electrically connected with the input end of the switch circuit, and the second end of the mth switch is electrically connected with the mth data voltage output end; the mth switch is used for controlling the connection or disconnection between the input end of the switch circuit and the mth data voltage output end under the control of the mth control signal provided by the mth control end;
m is a positive integer less than or equal to M.
Optionally, the data voltage providing circuit according to at least one embodiment of the present invention may further include M resistors;
The second end of the mth switch is electrically connected with the mth data voltage output end through an mth resistor.
In at least one embodiment of the present invention, M is equal to 2, but not limited thereto. In actual operation, M may be an integer greater than 1.
As shown in fig. 2, the switching circuit 10 includes a first switch K1 and a second switch K2 on the basis of the embodiment of the data voltage supply circuit shown in fig. 1;
the control end of the first switch K1 is electrically connected with the first control end EN1, the first end of the first switch K1 is electrically connected with the output end of the amplifier Amp, and the second end of the first switch K1 is electrically connected with the first data voltage output end Sout 1;
the control end of the second switch K2 is electrically connected to the second control end EN2, the first end of the second switch K2 is electrically connected to the output end of the amplifier Amp, and the second end of the second switch K2 is electrically connected to the second data voltage output end Sout 2.
In operation, at least one embodiment of the data voltage supply circuit shown in fig. 2, the first switch K1 controls the connection or disconnection between the output terminal of the amplifier Amp and the first data voltage output terminal Sout1 under the control of the first control signal provided by the first control terminal EN1, and the second switch K2 controls the connection or disconnection between the output terminal of the amplifier Amp and the second data voltage output terminal Sout2 under the control of the second control signal provided by the second control terminal EN 2.
The data voltage supply circuit of at least one embodiment of the present invention as shown in fig. 2 further includes a first resistor R1 and a second resistor R2, wherein the second end of the first resistor R1 is electrically connected to Sout1, and the second end of the second resistor K2 is electrically connected to Sout2 through the second resistor R2.
In operation, at least one embodiment of the data voltage providing circuit shown in fig. 2 may be turned on in a time-sharing manner, so that the amplifier Amp provides the amplified data voltage provided by the output terminal thereof to the first data voltage output terminal Sout1 or the second data voltage output terminal Sout2, but not limited thereto.
The data voltage providing module according to the embodiment of the invention comprises at least one data voltage providing unit, wherein the data voltage providing unit comprises a plurality of data voltage providing circuits.
The data voltage providing module according to at least one embodiment of the present invention further includes a plurality of memory cells; the data voltage supply unit includes a first data voltage supply circuit, a second data voltage supply circuit, a third data voltage supply circuit, and a fourth data voltage supply circuit;
the first storage unit is electrically connected with the first data voltage supply circuit and is used for storing data voltages corresponding to a first color and supplying the data voltages corresponding to the first color to the first data voltage supply circuit;
The first data voltage supply circuit is electrically connected with the first data voltage output end and the third data voltage output end respectively, and is used for amplifying the data voltage corresponding to the first color to obtain a first amplified data voltage and controlling the first amplified data voltage to be supplied to at least one of the first data voltage output end and the third data voltage output end;
the second memory cell is electrically connected with the second data voltage supply circuit and is used for storing a first data voltage corresponding to a second color and supplying the first data voltage corresponding to the second color to the second data voltage supply circuit;
the second data voltage supply circuit is electrically connected with the second data voltage output end and the fourth data voltage output end respectively, and is used for amplifying the first data voltage corresponding to the second color to obtain a second amplified data voltage and controlling the second amplified data voltage to be supplied to at least one of the second data voltage output end and the fourth data voltage output end;
a third memory cell electrically connected to the third data voltage supply circuit for storing a data voltage corresponding to a third color and supplying the data voltage corresponding to the third color to the third data voltage supply circuit;
The third data voltage supply circuit is electrically connected with the first data voltage output end and the third data voltage output end respectively, and is used for amplifying the data voltage corresponding to the third color to obtain a third amplified data voltage and controlling the third amplified data voltage to be supplied to at least one of the first data voltage output end and the third data voltage output end;
a fourth memory cell electrically connected to the fourth data voltage supply circuit for storing a second data voltage corresponding to a second color and supplying the second data voltage corresponding to the second color to the fourth data voltage supply circuit;
the fourth data voltage supply circuit is electrically connected with the second data voltage output end and the fourth data voltage output end respectively, and is used for amplifying the second data voltage corresponding to the second color to obtain a fourth amplified data voltage, and controlling the fourth amplified data voltage to be supplied to at least one of the second data voltage output end and the fourth data voltage output end.
In a specific implementation, the data voltage providing module according to the embodiment of the present invention may include at least one data voltage providing unit, where the data voltage providing circuit may include a first data voltage providing circuit, a second data voltage providing circuit, a third data voltage providing circuit, and a fourth data voltage providing circuit.
In at least one embodiment of the present invention, the first color may be red, the second color may be green, and the third color may be green; alternatively, the first color may be green, the second color may be green, and the third color may be red; but is not limited thereto.
As shown in fig. 3, the data voltage providing module according to at least one embodiment of the present invention may include a first memory cell DEC1, a second memory cell DEC2, a third memory cell DEC3, a fourth memory cell DEC4, and a data voltage providing unit including a first data voltage providing circuit 31, a second data voltage providing circuit 32, a third data voltage providing circuit 33, and a fourth data voltage providing circuit 34;
the first memory cell DEC1 is electrically connected to the first data voltage providing circuit 31, and is configured to store a data voltage corresponding to a first color and provide the data voltage corresponding to the first color to the first data voltage providing circuit 31;
the first data voltage providing circuit 31 is electrically connected to the first data voltage output terminal Sout1 and the third data voltage output terminal Sout3, and is configured to amplify the data voltage corresponding to the first color to obtain a first amplified data voltage, and provide the first amplified data voltage to at least one of the first data voltage output terminal Sout1 and the third data voltage output terminal Sout 3;
The second memory cell DEC2 is electrically connected to the second data voltage providing circuit 32, and is configured to store a first data voltage corresponding to a second color and provide the first data voltage corresponding to the second color to the second data voltage providing circuit 32;
the second data voltage providing circuit 32 is electrically connected to the second data voltage output terminal Sout2 and the fourth data voltage output terminal Sout4, and is configured to amplify the first data voltage corresponding to the second color to obtain a second amplified data voltage, and provide the second amplified data voltage to at least one of the second data voltage output terminal Sout2 and the fourth data voltage output terminal Sout 4;
the third memory cell DEC3 is electrically connected to the third data voltage providing circuit 33, and is configured to store a data voltage corresponding to a third color and provide the data voltage corresponding to the third color to the third data voltage providing circuit 33;
the third data voltage providing circuit 33 is electrically connected to the first data voltage output terminal Sout1 and the third data voltage output terminal Sout3, and is configured to amplify the data voltage corresponding to the third color to obtain a third amplified data voltage, and control to provide the third amplified data voltage to at least one of the first data voltage output terminal Sout1 and the third data voltage output terminal Sout 3;
The fourth memory cell DEC4 is electrically connected to the fourth data voltage providing circuit 34, and is configured to store a second data voltage corresponding to a second color and provide the second data voltage corresponding to the second color to the fourth data voltage providing circuit 34;
the fourth data voltage providing circuit 34 is electrically connected to the second data voltage output terminal Sout2 and the fourth data voltage output terminal Sout4, and is configured to amplify the second data voltage corresponding to the second color to obtain a fourth amplified data voltage, and control to provide the fourth amplified data voltage to at least one of the second data voltage output terminal Sout2 and the fourth data voltage output terminal Sout 4.
In at least one embodiment of the data voltage providing module shown in fig. 3, the data voltage providing module includes a data voltage providing unit and four memory cells; in actual operation, the data voltage providing module may also include more than two data voltage providing units, and the number of the memory cells included in the data voltage providing module may be the same as the number of the data voltage providing circuits included in the data voltage providing module, but not limited to this.
Optionally, the first data voltage providing circuit includes a first amplifier and a first switching circuit; the first switch circuit comprises a first switch and a second switch;
the input end of the first amplifier is electrically connected with the first storage unit, the output end of the first amplifier is respectively electrically connected with the first end of the first switch and the first end of the second switch, the first amplifier is used for receiving the data voltage corresponding to the first color, amplifying the data voltage corresponding to the first color, and obtaining and outputting a first amplified data voltage through the output end of the first amplifier;
the control end of the first switch is electrically connected with the first control end, the second end of the first switch is electrically connected with the first data voltage output end, and the first switch is used for controlling the connection or disconnection between the output end of the first amplifier and the first data voltage output end under the control of a first control signal provided by the first control end;
the control end of the second switch is electrically connected with the second control end, the second end of the second switch is electrically connected with the third data voltage output end, and the second switch is used for controlling the connection or disconnection between the output end of the first amplifier and the third data voltage output end under the control of a second control signal provided by the second control end.
Optionally, the second data voltage providing circuit includes a second amplifier and a second switching circuit; the second switching circuit comprises a third switch and a fourth switch;
the input end of the second amplifier is electrically connected with the second storage unit, the output end of the second amplifier is electrically connected with the first end of the second switch and the second end of the second switch respectively, the second amplifier is used for receiving the first data voltage corresponding to the second color, amplifying the first data voltage corresponding to the second color, and obtaining and outputting second amplified data voltage through the output end of the second amplifier;
the control end of the third switch is electrically connected with a third control end, the second end of the third switch is electrically connected with a second data voltage output end, and the third switch is used for controlling the connection or disconnection between the output end of the second amplifier and the second data voltage output end under the control of a third control signal provided by the third control end;
the control end of the fourth switch is electrically connected with the fourth control end, the second end of the fourth switch is electrically connected with the fourth data voltage output end, and the fourth switch is used for controlling the connection or disconnection between the output end of the second amplifier and the fourth data voltage output end under the control of a fourth control signal provided by the fourth control end.
Optionally, the third data voltage providing circuit includes a third amplifier and a third switching circuit; the third switching circuit comprises a fifth switch and a sixth switch;
the input end of the third amplifier is electrically connected with the third storage unit, the output end of the third amplifier is respectively electrically connected with the first end of the fifth switch and the first end of the sixth switch, and the third amplifier is used for receiving the data voltage corresponding to the third color, amplifying the data voltage corresponding to the third color, obtaining and outputting a third amplified data voltage through the output end of the third amplifier;
the control end of the fifth switch is electrically connected with the fifth control end, the second end of the fifth switch is electrically connected with the first data voltage output end, and the fifth switch is used for controlling the connection or disconnection between the output end of the third amplifier and the first data voltage output end under the control of a fifth control signal provided by the fifth control end;
the control end of the sixth switch is electrically connected with the sixth control end, the second end of the sixth switch is electrically connected with the third data voltage output end, and the sixth switch is used for controlling the connection or disconnection between the output end of the third amplifier and the third data voltage output end under the control of a sixth control signal provided by the sixth control end.
Optionally, the fourth data voltage providing circuit includes a fourth amplifier and a fourth switch circuit; the fourth switch circuit comprises a seventh switch and an eighth switch;
the input end of the fourth amplifier is electrically connected with the fourth storage unit, the output end of the fourth amplifier is electrically connected with the first end of the seventh switch and the second end of the eighth switch respectively, the fourth amplifier is used for receiving the second data voltage corresponding to the second color, amplifying the second data voltage corresponding to the second color, and obtaining and outputting a fourth amplified data voltage through the output end of the fourth amplifier;
the control end of the seventh switch is electrically connected with a seventh control end, the second end of the seventh switch is electrically connected with a second data voltage output end, and the seventh switch is used for controlling the connection or disconnection between the output end of the fourth amplifier and the second data voltage output end under the control of a seventh control signal provided by the seventh control end;
the control end of the eighth switch is electrically connected with the eighth control end, the second end of the eighth switch is electrically connected with the fourth data voltage output end, and the eighth switch is used for controlling the connection or disconnection between the output end of the fourth amplifier and the fourth data voltage output end under the control of an eighth control signal provided by the eighth control end.
As shown in fig. 4, in operation of at least one embodiment of the data voltage providing module shown in fig. 3,
the first data voltage supply circuit comprises a first amplifier Amp1 and a first switch circuit; the first switch circuit comprises a first switch K1 and a second switch K2;
the input end of the first amplifier Amp1 is electrically connected with the first storage unit DEC1, the output end of the first amplifier Amp1 is respectively electrically connected with the first end of the first switch K1 and the first end of the second switch K2, the first amplifier Amp1 is used for receiving red data voltage, amplifying the red data voltage, and obtaining and outputting first amplified data voltage through the output end of the first amplifier;
the control end of the first switch K1 is electrically connected to a first control end EN1, the second end of the first switch K1 is electrically connected to a first data voltage output end Sout1, and the first switch K1 is configured to control the connection or disconnection between the output end of the first amplifier Amp1 and the first data voltage output end Sout1 under the control of a first control signal provided by the first control end EN 1;
the control end of the second switch K2 is electrically connected to the second control end EN2, the second end of the second switch K2 is electrically connected to the third data voltage output end Sout3, and the second switch K2 is configured to control the connection or disconnection between the output end of the first amplifier Amp1 and the third data voltage output end Sout3 under the control of the second control signal provided by the second control end EN 2;
The second data voltage supply circuit includes a second amplifier Amp2 and a second switching circuit; the second switching circuit comprises a third switch K3 and a fourth switch K4;
the input end of the second amplifier Amp2 is electrically connected with the second storage unit DEC2, the output end of the second amplifier Amp2 is respectively electrically connected with the first end of the second switch L2 and the second end of the second switch K2, and the second amplifier Amp2 is configured to receive a first green data voltage, amplify the first green data voltage, and obtain and output a second amplified data voltage through the output end of the second amplifier Amp 2;
the control end of the third switch K3 is electrically connected to a third control end EN3, the second end of the third switch K3 is electrically connected to a second data voltage output end Sout2, and the third switch K3 is configured to control the output end of the second amplifier Amp2 to be connected to or disconnected from the second data voltage output end Sout2 under the control of a third control signal provided by the third control end EN 3;
the control end of the fourth switch K4 is electrically connected to a fourth control end EN4, the second end of the fourth switch K4 is electrically connected to a fourth data voltage output end Sout4, and the fourth switch K4 is configured to control the output end of the second amplifier Amp2 to be connected to or disconnected from the fourth data voltage output end Sout4 under the control of a fourth control signal provided by the fourth control end EM 4;
The third data voltage supply circuit comprises a third amplifier Amp3 and a third switch circuit; the third switching circuit comprises a fifth switch K5 and a sixth switch K6;
the input end of the third amplifier Amp3 is electrically connected with the third storage unit DEC3, the output end of the third amplifier Amp3 is electrically connected with the first end of the fifth switch K5 and the first end of the sixth switch K6 respectively, the third amplifier Amp3 is used for receiving a blue data voltage, amplifying the blue data voltage, and obtaining and outputting a third amplified data voltage through the output end of the third amplifier Amp 3;
the control end of the fifth switch K5 is electrically connected to a fifth control end EN5, the second end of the fifth switch K5 is electrically connected to the first data voltage output end Sout1, and the fifth switch K5 is configured to control the connection or disconnection between the output end of the third amplifier Amp3 and the first data voltage output end Sout1 under the control of a fifth control signal provided by the fifth control end EM 5;
the control end of the sixth switch K6 is electrically connected to a sixth control end EN6, the second end of the sixth switch K6 is electrically connected to a third data voltage output end Sout3, and the sixth switch K6 is configured to control the connection or disconnection between the output end of the third amplifier Amp3 and the third data voltage output end Sout3 under the control of a sixth control signal provided by the sixth control end EN 6;
The fourth data voltage supply circuit comprises a fourth amplifier Amp4 and a fourth switch circuit; the fourth switch circuit comprises a seventh switch K7 and an eighth switch K8;
the input end of the fourth amplifier Amp4 is electrically connected to the fourth storage unit DEC4, the output end of the fourth amplifier Amp4 is electrically connected to the first end of the seventh switch K7 and the second end of the eighth switch K8, and the fourth amplifier Amp4 is configured to receive a second green data voltage, amplify the second green data voltage, and obtain and output a fourth amplified data voltage through the output end of the fourth amplifier Amp 4;
the control end of the seventh switch K7 is electrically connected to a seventh control end EN7, the second end of the seventh switch K7 is electrically connected to the second data voltage output end Sout2, and the seventh switch K7 is configured to control the output end of the fourth amplifier Amp4 to be connected to or disconnected from the second data voltage output end Sout2 under the control of a seventh control signal provided by the seventh control end EN 7;
the control end of the eighth switch K8 is electrically connected to the eighth control end EN8, the second end of the eighth switch K8 is electrically connected to the fourth data voltage output end Sout4, and the eighth switch K8 is configured to control the output end of the fourth amplifier Amp4 to be connected to or disconnected from the fourth data voltage output end Sout4 under the control of an eighth control signal provided by the eighth control end EN 8.
At least one embodiment of the data voltage providing module shown in fig. 4 further includes a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4;
the second end of K1 is electrically connected with Sout1 through a first resistor R1, the second end of K2 is electrically connected with Sout3 through a third resistor R3, the second end of K3 is electrically connected with Sout2 through a second resistor R2, and the second end of K4 is electrically connected with Sout4 through a fourth resistor R4; the second end of K5 is electrically connected with Sout3 through a third resistor R3, and the second end of K6 is electrically connected with Sout2 through a second resistor R2; the second end of K7 is electrically connected to Sout4 through a fourth resistor R4, and the second end of K8 is electrically connected to Sout2 through a second resistor R2.
In at least one embodiment of the data voltage providing module shown in fig. 4, the first color is red, the second color is green, and the second color is blue; the first amplified data voltage is a first amplified red data voltage, the second amplified data voltage is a second amplified green data voltage, the third amplified data voltage is a third amplified blue data voltage, and the fourth amplified data voltage is a fourth amplified green data voltage.
As shown in fig. 5, at least one embodiment of the data voltage providing module of the present invention as shown in fig. 4 is operated, in the first odd data voltage providing period TO1 and the second odd data voltage providing period TO2,
EN1 provides a high voltage signal, EN2 provides a low voltage signal, as shown in fig. 6, K1 is on, K2 is off, and the first amplified red data voltage is provided to Sout1;
EN3 provides a high voltage signal, EN4 provides a low voltage signal, as shown in fig. 6, K3 is on, K4 is off, and the second amplified green data voltage is provided to Sout2;
EN5 provides a low voltage signal, EN6 provides a high voltage signal, as shown in fig. 6, K5 is off, K6 is on, and the third amplified blue data voltage is provided to Sout3;
EN7 provides a low voltage signal, EN8 provides a high voltage signal, as shown in fig. 6, K7 is off, K8 is on, and the fourth amplified green data voltage is provided to Sout4.
As shown in fig. 5, at least one embodiment of the data voltage providing module of the present invention shown in fig. 4 is operated, in the first even data voltage providing period TE1 and the second even data voltage providing period TE2,
EN1 provides a low voltage signal, EN2 provides a high voltage signal, as shown in fig. 7, K1 is off, K2 is on, and the first amplified red data voltage is provided to Sout3;
EN3 provides a high voltage signal, EN4 provides a low voltage signal, as shown in fig. 7, K3 is on, K4 is off, and the second amplified green data voltage is provided to Sout2;
EN5 provides a high voltage signal, EN6 provides a low voltage signal, as shown in fig. 7, K5 is on, K6 is off, and the third amplified blue data voltage is provided to Sout1;
EN7 provides a low voltage signal, EN8 provides a high voltage signal, as shown in fig. 7, K7 is off, K8 is on, and the fourth amplified green data voltage is provided to Sout4.
In fig. 5, a first odd data voltage supply period is denoted by TO1, a first even data voltage supply period is denoted by TE1, a second odd data voltage supply period is denoted by TO2, and a second even data voltage supply period is denoted by TE 2.
In fig. 5, the row Sync signal is labeled H-Sync and the overall control switch signal is labeled S-Latch.
At least one embodiment of the data voltage providing module shown in fig. 4 may be used to provide data voltages for data lines included in a display panel employing an RGBG pixel arrangement mode, so as to provide a first amplified red data voltage to Sout1, a second amplified green data voltage to Sout2, a third amplified blue data voltage to Sout3, and a fourth amplified green data voltage to Sout4 when the odd-numbered row gate lines are opened; when the even-numbered row gate lines are opened, the first amplified red data voltage is provided to Sout3, the second amplified green data voltage is provided to Sout2, the third amplified blue data voltage is provided to Sout1, and the fourth amplified green data voltage is provided to Sout4; to enable multiplexing.
In at least one embodiment of the data voltage providing module shown in fig. 4, K1, K2, K3, K4, K5, K6, K7 and K8 may constitute a multiplexing circuit.
In at least one embodiment of the data voltage providing module shown in fig. 4, each data voltage output end is connected with each amplifier after passing through a multiplexing circuit consisting of K1, K2, K3, K4, K5, K6, K7 and K8, and at least half of the influence of external interference can be realized through the cooperation of a switch, so that the working stability of each amplifier can be better ensured, and the stability of an output signal is ensured.
The data driver of the embodiment of the invention comprises the data voltage providing module;
as shown in fig. 8, the data driver further includes a gamma binding point voltage generating circuit 81 and a data voltage generating circuit 82, the gamma binding point voltage generating circuit 81 being configured to generate a plurality of gamma binding point voltages;
the data voltage generating circuit 82 is electrically connected to the gamma binding point voltage generating circuit 81, and is configured to obtain a data voltage corresponding to a predetermined gray level according to the gamma binding point voltage, and provide the data voltage to the data voltage providing module 80.
In a specific implementation, the driving circuit according to the embodiment of the present invention may include the data voltage providing module described above, and the data driver may include a gamma binding point voltage generating circuit 81 and a data voltage generating circuit 82, where the data voltage generating circuit 82 generates a data voltage according to the plurality of gamma binding point voltages generated by the gamma binding point voltage generating circuit 81, and provides the data voltage to the data voltage providing module 80.
In at least one embodiment of the present invention, as shown in fig. 9, the gamma binding point voltage generating circuit may include a first voltage follower, a second voltage follower, and a generating sub-circuit 90; the first voltage follower comprises a first following amplifier A1, and the second voltage follower comprises a second following amplifier A2;
the non-inverting input end of the first follower amplifier A1 is connected to a first input gamma reference voltage VGMP1, the inverting input end of the first follower amplifier A1 is electrically connected to the output end of the first follower amplifier A1, the output end of the first follower amplifier A1 is electrically connected to the generating sub-circuit 90, the first follower amplifier A1 is configured to obtain a first output gamma reference voltage VGMP2 according to the first input gamma reference voltage VGMP1, and the voltage value of the first input gamma reference voltage VGMP1 is equal to the voltage value of the first output gamma reference voltage VGMP 2;
The non-inverting input end of the second follower amplifier A2 is connected to a second input gamma reference voltage VGSP1, the inverting input end of the second follower amplifier A2 is electrically connected to the output end of the second follower amplifier A2, the output end of the second follower amplifier A2 is electrically connected to the generating sub-circuit 90, the second follower amplifier A2 is configured to obtain a second output gamma reference voltage VGSP2 according to the second input gamma reference voltage VGSP1, and the voltage value of the second input gamma reference voltage VGSP1 is equal to the voltage value of the second output gamma reference voltage VGSP 2;
the generating sub-circuit 90 is configured to generate and output a plurality of gamma binding point voltages through an output terminal of the generating sub-circuit 90 according to the first output gamma reference voltage VGMP2 and the second output gamma reference voltage VGSP 2.
In at least one embodiment of the gamma binding point voltage generating circuit shown in fig. 9, a first follower amplifier A1 and a second follower amplifier A2 are added, where when there is a disturbance at the output end of the generating sub-circuit 90, the output ends A1 and A2 can block the flow from the output end of the generating sub-circuit 90 to the input end (the input end may include a non-inverting input end of A1 and a non-inverting input end of A2), so as to maintain the stability of the signal at the input end.
As shown in fig. 10, on the basis of at least one embodiment of the gamma binding point voltage generating circuit shown in fig. 9, the at least one embodiment of the gamma binding point voltage generating circuit may further include a gamma reference voltage generating circuit 100; the generating sub-circuit may include N generating amplifiers, an input resistance unit 101, and an output resistance unit 102;
the gamma reference voltage generating circuit 100 is configured to generate a first input gamma reference voltage VGMP1 and a second input gamma reference voltage VGSP1, and provide the first input gamma reference voltage VGMP1 to a non-inverting input terminal of the first follower amplifier A1, and provide the second input gamma reference voltage VGSP1 to a non-inverting input terminal of the second follower amplifier A2;
a first input resistor denoted by R11 and included in the input resistor unit 101, a second input resistor denoted by R12 and included in the input resistor unit 101, a third input resistor denoted by R13 and included in the input resistor unit 101, an N-2 input resistor denoted by R1N-2 and included in the input resistor unit 101, an N-1 input resistor denoted by R1N-1 and included in the input resistor unit 101, and an N-1 input resistor denoted by R1N and included in the input resistor unit 101;
A first output resistor denoted by R21 and included in the output resistor unit 102, a second output resistor denoted by R22 and included in the output resistor unit 102, a third output resistor denoted by R23 and included in the output resistor unit 102, an N-2 output resistor denoted by R2N-2 and included in the output resistor unit 101, an N-1 output resistor denoted by R2N-1 and included in the output resistor unit 102, and an N-th output resistor denoted by R2N and included in the output resistor unit 102;
the first generating amplifier is denoted by AS1, the second generating amplifier is denoted by AS2, the third generating amplifier is denoted by AS3, the N-2 generating amplifier is denoted by ASN-2, the N-1 generating amplifier is denoted by ASN-1, and the N generating amplifier is denoted by ASN;
r11 is electrically connected between the non-inverting input terminal of A1 and the input terminal of AS 1; AS1 is used for amplifying the voltage of the input end of the power amplifier, and outputting the amplified voltage through the output end of AS 1;
r12 is electrically connected between the input end of AS1 and the input end of AS 2; AS2 is used for amplifying the voltage of the input end of the power amplifier, and outputting the amplified voltage through the output end of AS 2;
R13 is electrically connected between the input of AS2 and the input of AS 3; AS3 is used for amplifying the voltage of the input end of the power amplifier, and outputting the amplified voltage through the output end of AS 3;
R1N-2 is electrically connected between the input end of the ASN-2 and the input end of the ASN-1; the ASN-2 is used for amplifying the voltage of the input end of the ASN-2 and outputting the amplified voltage through the output end of the ASN-2;
R1N-1 is electrically connected between the input end of the ASN-1 and the input end of the ASN; the ASN-1 is used for amplifying the voltage of the input end of the ASN-1 and outputting the amplified voltage through the output end of the ASN-1;
the input end of the R1N is electrically connected with the ASN and the non-inverting input end of the A2; the ASN is used for amplifying the voltage of the input end of the ASN and outputting the amplified voltage through the output end of the ASN;
r21 is electrically connected between the output end of A1 and the output end of AS 1;
r22 is electrically connected between the output end of AS1 and the output end of AS 2;
r23 is electrically connected between the output of AS2 and the output of AS 3;
R2N-2 is electrically connected between the output end of the ASN-2 and the output end of the ASN-1;
R2N-1 is electrically connected between the output end of the ASN-1 and the output end of the ASN;
R2N is electrically connected between the output end of the ASN and the output end of the A2;
the output end of AS1 is used for providing a first gamma binding point voltage, the output end of AS2 is used for providing a second gamma binding point voltage, the output end of AS3 is used for providing a third gamma binding point voltage, the output end of ASN-2 is used for providing an N-2 gamma binding point voltage, the output end of ASN-1 is used for providing an N-1 gamma binding point voltage, and the output end of ASN is used for providing an N gamma binding point voltage.
In at least one embodiment of the gamma binding point voltage generating circuit, an nth input resistor is electrically connected between an input end of the nth generating amplifier and an input end of the n+1th generating amplifier, an nth output resistor is electrically connected between an output end of the nth generating amplifier and an output end of the n+1th generating amplifier, N is an integer greater than 1, and N is smaller than N;
n is an integer greater than 5, for example, N may be equal to 18, but is not limited thereto.
As shown in fig. 11, the gamma reference voltage generation circuit 100 may include a generation resistor string 110, a first multiplexer 111, a second multiplexer 112, a first input amplifier AI1, and a second input amplifier AI2, based on at least one embodiment of the gamma binding point voltage generation circuit shown in fig. 10;
a first end of the generating resistor string 110 is connected to a first voltage vreout;
a second end of the generating resistor string 110 is connected to a second voltage VGS;
a plurality of input terminals of the first multiplexer 111 are electrically connected to corresponding nodes of the generating resistor string 110, respectively; the output end of the first multiplexer 111 is electrically connected with the input end of the first input amplifier AI 1; the first multiplexer 111 is configured to control communication between one of its plurality of inputs and an output of the first multiplexer 111;
The output end of the first input amplifier AI1 is used for providing the first input gamma reference voltage VGMP1; the first input amplifier AI1 is configured to amplify a voltage connected to an input end thereof to obtain the first input gamma reference voltage VGMP1;
a plurality of input terminals of the second multiplexer 112 are electrically connected to corresponding nodes of the generating resistor string 110, respectively; the output end of the second multiplexer 112 is electrically connected with the input end of the second input amplifier AI 2; the first multiplexer 112 is configured to control communication between one of its plurality of inputs and an output of the first multiplexer 112;
the output end of the second input amplifier AI2 is used for providing the second input gamma reference voltage VGSP1; the second input amplifier AI2 is configured to amplify a voltage connected to an input terminal thereof to obtain the second input gamma reference voltage VGSP1.
In at least one embodiment of the gamma binding point voltage generating circuit shown in fig. 11, the first multiplexer 111 and the second multiplexer 112 may be 13bit multiplexers, but not limited thereto.
The display device according to the embodiment of the invention comprises the data driver.
The display device provided by the embodiment of the invention can be any product or component with a display function, such as a mobile phone, a tablet personal computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.

Claims (10)

1. A data voltage providing module, comprising at least one data voltage providing unit, wherein the data voltage providing unit comprises a plurality of data voltage providing circuits;
the data voltage supply circuit is used for supplying data voltage to the data voltage output end; the data voltage supply circuit includes an amplifier and a switching circuit;
the amplifier is electrically connected with the input end of the switch circuit and is used for receiving the data voltage, amplifying the data voltage to obtain an amplified data voltage and providing the amplified data voltage to the input end of the switch circuit;
the switching circuit is respectively and electrically connected with the control end and at least two data voltage output ends and is used for controlling the communication between the input end of the switching circuit and at least one of the at least two data voltage output ends under the control of a control signal provided by the control end;
The data voltage supply module further comprises a plurality of storage units; the data voltage supply unit includes a first data voltage supply circuit, a second data voltage supply circuit, a third data voltage supply circuit, and a fourth data voltage supply circuit;
the first storage unit is electrically connected with the first data voltage supply circuit and is used for storing data voltages corresponding to a first color and supplying the data voltages corresponding to the first color to the first data voltage supply circuit;
the first data voltage supply circuit is electrically connected with the first data voltage output end and the third data voltage output end respectively, and is used for amplifying the data voltage corresponding to the first color to obtain a first amplified data voltage and controlling the first amplified data voltage to be supplied to at least one of the first data voltage output end and the third data voltage output end;
the second memory cell is electrically connected with the second data voltage supply circuit and is used for storing a first data voltage corresponding to a second color and supplying the first data voltage corresponding to the second color to the second data voltage supply circuit;
the second data voltage supply circuit is electrically connected with the second data voltage output end and the fourth data voltage output end respectively, and is used for amplifying the first data voltage corresponding to the second color to obtain a second amplified data voltage, and controlling the second amplified data voltage to be supplied to at least one of the second data voltage output end and the fourth data voltage output end;
A third memory cell electrically connected to the third data voltage supply circuit for storing a data voltage corresponding to a third color and supplying the data voltage corresponding to the third color to the third data voltage supply circuit;
the third data voltage supply circuit is electrically connected with the first data voltage output end and the third data voltage output end respectively, and is used for amplifying the data voltage corresponding to the third color to obtain a third amplified data voltage, and controlling the third amplified data voltage to be supplied to at least one of the first data voltage output end and the third data voltage output end;
a fourth memory cell electrically connected to the fourth data voltage supply circuit for storing a second data voltage corresponding to a second color and supplying the second data voltage corresponding to the second color to the fourth data voltage supply circuit;
the fourth data voltage supply circuit is electrically connected with the second data voltage output end and the fourth data voltage output end respectively, and is used for amplifying the second data voltage corresponding to the second color to obtain a fourth amplified data voltage, and controlling the fourth amplified data voltage to be supplied to at least one of the second data voltage output end and the fourth data voltage output end.
2. The data voltage supply module of claim 1, wherein the switching circuit is electrically connected to M data voltage outputs; the switching circuit comprises M switches; m is an integer greater than 1;
the control end of the mth switch is electrically connected with the mth control end, the first end of the mth switch is electrically connected with the input end of the switch circuit, and the second end of the mth switch is electrically connected with the mth data voltage output end; the mth switch is used for controlling the connection or disconnection between the input end of the switch circuit and the mth data voltage output end under the control of the mth control signal provided by the mth control end;
m is a positive integer less than or equal to M.
3. The data voltage supply module of claim 2, wherein the data voltage supply circuit further comprises M resistors;
the second end of the mth switch is electrically connected with the mth data voltage output end through an mth resistor.
4. A data voltage supply module according to any one of claims 1 to 3, wherein the first data voltage supply circuit comprises a first amplifier and a first switching circuit; the first switch circuit comprises a first switch and a second switch;
The input end of the first amplifier is electrically connected with the first storage unit, the output end of the first amplifier is respectively electrically connected with the first end of the first switch and the first end of the second switch, the first amplifier is used for receiving the data voltage corresponding to the first color, amplifying the data voltage corresponding to the first color, and obtaining and outputting a first amplified data voltage through the output end of the first amplifier;
the control end of the first switch is electrically connected with the first control end, the second end of the first switch is electrically connected with the first data voltage output end, and the first switch is used for controlling the connection or disconnection between the output end of the first amplifier and the first data voltage output end under the control of a first control signal provided by the first control end;
the control end of the second switch is electrically connected with the second control end, the second end of the second switch is electrically connected with the third data voltage output end, and the second switch is used for controlling the connection or disconnection between the output end of the first amplifier and the third data voltage output end under the control of a second control signal provided by the second control end.
5. A data voltage supply module according to any one of claims 1 to 3, wherein the second data voltage supply circuit comprises a second amplifier and a second switching circuit; the second switching circuit comprises a third switch and a fourth switch;
the input end of the second amplifier is electrically connected with the second storage unit, the output end of the second amplifier is electrically connected with the first end of the second switch and the second end of the second switch respectively, the second amplifier is used for receiving the first data voltage corresponding to the second color, amplifying the first data voltage corresponding to the second color, and obtaining and outputting second amplified data voltage through the output end of the second amplifier;
the control end of the third switch is electrically connected with a third control end, the second end of the third switch is electrically connected with a second data voltage output end, and the third switch is used for controlling the connection or disconnection between the output end of the second amplifier and the second data voltage output end under the control of a third control signal provided by the third control end;
the control end of the fourth switch is electrically connected with the fourth control end, the second end of the fourth switch is electrically connected with the fourth data voltage output end, and the fourth switch is used for controlling the connection or disconnection between the output end of the second amplifier and the fourth data voltage output end under the control of a fourth control signal provided by the fourth control end.
6. A data voltage supply module according to any one of claims 1 to 3, wherein the third data voltage supply circuit comprises a third amplifier and a third switching circuit; the third switching circuit comprises a fifth switch and a sixth switch;
the input end of the third amplifier is electrically connected with the third storage unit, the output end of the third amplifier is respectively electrically connected with the first end of the fifth switch and the first end of the sixth switch, and the third amplifier is used for receiving the data voltage corresponding to the third color, amplifying the data voltage corresponding to the third color, obtaining and outputting a third amplified data voltage through the output end of the third amplifier;
the control end of the fifth switch is electrically connected with the fifth control end, the second end of the fifth switch is electrically connected with the first data voltage output end, and the fifth switch is used for controlling the connection or disconnection between the output end of the third amplifier and the first data voltage output end under the control of a fifth control signal provided by the fifth control end;
the control end of the sixth switch is electrically connected with the sixth control end, the second end of the sixth switch is electrically connected with the third data voltage output end, and the sixth switch is used for controlling the connection or disconnection between the output end of the third amplifier and the third data voltage output end under the control of a sixth control signal provided by the sixth control end.
7. A data voltage supply module according to any one of claims 1 to 3, wherein the fourth data voltage supply circuit comprises a fourth amplifier and a fourth switching circuit; the fourth switch circuit comprises a seventh switch and an eighth switch;
the input end of the fourth amplifier is electrically connected with the fourth storage unit, the output end of the fourth amplifier is electrically connected with the first end of the seventh switch and the second end of the eighth switch respectively, the fourth amplifier is used for receiving the second data voltage corresponding to the second color, amplifying the second data voltage corresponding to the second color, and obtaining and outputting a fourth amplified data voltage through the output end of the fourth amplifier;
the control end of the seventh switch is electrically connected with a seventh control end, the second end of the seventh switch is electrically connected with a second data voltage output end, and the seventh switch is used for controlling the connection or disconnection between the output end of the fourth amplifier and the second data voltage output end under the control of a seventh control signal provided by the seventh control end;
the control end of the eighth switch is electrically connected with the eighth control end, the second end of the eighth switch is electrically connected with the fourth data voltage output end, and the eighth switch is used for controlling the connection or disconnection between the output end of the fourth amplifier and the fourth data voltage output end under the control of an eighth control signal provided by the eighth control end.
8. A data driver comprising a data voltage supply module according to any one of claims 1 to 7;
the data driver further comprises a gamma binding point voltage generating circuit and a data voltage generating circuit, wherein the gamma binding point voltage generating circuit is used for generating a plurality of gamma binding point voltages;
the data voltage generating circuit is used for obtaining data voltages corresponding to preset gray scales according to the gamma binding point voltages and providing the data voltages to the data voltage providing module.
9. The data driver of claim 8, wherein the gamma binding point voltage generation circuit comprises a first voltage follower, a second voltage follower, and a generation sub-circuit; the first voltage follower comprises a first follower amplifier, and the second voltage follower comprises a second follower amplifier;
the non-inverting input end of the first follower amplifier is connected with a first input gamma reference voltage, the inverting input end of the first follower amplifier is electrically connected with the output end of the first follower amplifier, the output end of the first follower amplifier is electrically connected with the generation sub-circuit, the first follower amplifier is used for obtaining a first output gamma reference voltage according to the first input gamma reference voltage, and the voltage value of the first input gamma reference voltage is equal to the voltage value of the first output gamma reference voltage;
The non-inverting input end of the second following amplifier is connected with a second input gamma reference voltage, the inverting input end of the second following amplifier is electrically connected with the output end of the second following amplifier, the output end of the second following amplifier is electrically connected with the generating sub-circuit, the second following amplifier is used for obtaining a second output gamma reference voltage according to the second input gamma reference voltage, and the voltage value of the second input gamma reference voltage is equal to the voltage value of the second output gamma reference voltage;
the generation sub-circuit is used for generating a plurality of gamma binding point voltages according to the first output gamma reference voltage and the second output gamma reference voltage.
10. A display device comprising a data driver as claimed in claim 8 or 9.
CN202210301442.4A 2022-03-24 2022-03-24 Data voltage supply circuit, module, data driver and display device Active CN114550659B (en)

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Publication number Priority date Publication date Assignee Title
CN101162335A (en) * 2006-10-10 2008-04-16 精工爱普生株式会社 Gate driver, electro-optical device, electronic instrument, and drive method
CN102646388A (en) * 2011-06-02 2012-08-22 京东方科技集团股份有限公司 Driving device, organic light emitting diode (OLED) panel and OLED panel driving method
CN209571217U (en) * 2018-10-08 2019-11-01 惠科股份有限公司 A kind of pixel-driving circuit and display device of display panel
CN113763852A (en) * 2020-06-03 2021-12-07 敦泰电子股份有限公司 Display driving circuit and display apparatus using the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101162335A (en) * 2006-10-10 2008-04-16 精工爱普生株式会社 Gate driver, electro-optical device, electronic instrument, and drive method
CN102646388A (en) * 2011-06-02 2012-08-22 京东方科技集团股份有限公司 Driving device, organic light emitting diode (OLED) panel and OLED panel driving method
CN209571217U (en) * 2018-10-08 2019-11-01 惠科股份有限公司 A kind of pixel-driving circuit and display device of display panel
CN113763852A (en) * 2020-06-03 2021-12-07 敦泰电子股份有限公司 Display driving circuit and display apparatus using the same

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