CN109272929B - Source electrode driving circuit, driving method, source electrode driving device and display device - Google Patents
Source electrode driving circuit, driving method, source electrode driving device and display device Download PDFInfo
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- CN109272929B CN109272929B CN201811398553.1A CN201811398553A CN109272929B CN 109272929 B CN109272929 B CN 109272929B CN 201811398553 A CN201811398553 A CN 201811398553A CN 109272929 B CN109272929 B CN 109272929B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- 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]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- 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]
- G09G3/3275—Details of drivers for data electrodes
- G09G3/3291—Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
Abstract
The disclosure provides a source electrode driving circuit, a driving method, a source electrode driving device and a display device, and belongs to the technical field of display devices. The source electrode driving circuit is used for outputting data voltage signals to the data end of the pixel unit and comprises a source electrode control unit, a compensation arithmetic unit and a data output unit; the source control unit is used for receiving a source control signal and sending a control instruction; the control instruction comprises a first control signal and a second control signal; the compensation arithmetic unit is connected with the source electrode control unit and used for responding to the first control signal, receiving the initial data signal and the compensation data signal and outputting the first data signal; the data output device is connected with the source electrode control unit and the compensation arithmetic device and used for responding to the second control signal, converting the first data signal to obtain a data voltage signal and outputting the data voltage signal to the data end of the pixel unit. The source electrode driving circuit can realize data compensation on the pixel unit.
Description
Technical Field
The present disclosure relates to the field of display device technologies, and in particular, to a source driving circuit, a driving method, a source driving device, and a display device.
Background
TFTs (Thin Film transistors) are widely used in the display field, and can be used for manufacturing a driving circuit layer of an OLED (Organic Light-Emitting Diode) display panel, for example.
Since the TFT characteristics are unstable, the TFT display device manufactured by the same needs to be compensated for data signals in order to improve image quality. In the prior art, a compensation device of a TFT display device is disposed on a Timing Controller (TCON), which causes an interface portion of the timing controller to be different from interface portions of timing controllers of other types of display devices, thereby increasing the cost and design complexity of the timing controller of the TFT display device.
The above information disclosed in the background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute prior art that is known to a person of ordinary skill in the art.
Disclosure of Invention
The present disclosure is directed to a source driving circuit, a driving method, a source driving apparatus, and a display apparatus, which implement data compensation for a pixel unit.
In order to achieve the purpose, the technical scheme adopted by the disclosure is as follows:
according to a first aspect of the present disclosure, there is provided a source driving circuit for outputting a data voltage signal to a data terminal of a pixel unit; the source driving circuit includes:
the source control unit is used for receiving a source control signal input by the time sequence controller and sending a control instruction according to the source control signal; the control instruction comprises a first control signal and a second control signal;
the compensation arithmetic unit is connected with the source electrode control unit and used for responding to the first control signal, receiving an initial data signal input by the time schedule controller and a compensation data signal input by a storage device and outputting a first data signal according to the initial data signal and the compensation data signal;
and the data output device is connected with the source electrode control unit and the compensation arithmetic device and used for responding to the second control signal, converting the first data signal to obtain the data voltage signal and outputting the data voltage signal to the data end of the pixel unit.
In an exemplary embodiment of the present disclosure, the control instruction further includes a third control signal:
the compensation operator is further used for responding to the third control signal, receiving an externally input optical compensation data signal and outputting a first compensation data signal according to the optical compensation data signal; the first compensation data signal is receivable by the memory device and is used to update compensation data stored by the memory device.
In an exemplary embodiment of the present disclosure, the pixel unit further includes a sensing terminal; the control instruction further comprises a fourth control signal;
the source driving circuit further includes:
and the sensing controller is connected with the source control unit and used for responding to the fourth control signal and outputting a reset signal to the sensing end of the pixel unit, and the reset signal can reset the pixel unit.
In an exemplary embodiment of the present disclosure, the control instructions further include a fifth control signal, a sixth control signal, and a seventh control signal,
the data outputter is further used for responding to the fifth control signal and outputting a first sensing voltage signal to the data end of the pixel unit;
the sensing controller is further configured to output a floating signal to the sensing terminal of the pixel unit in response to the sixth control signal, receive a second sensing voltage signal output by the sensing terminal of the pixel unit, and output a third sensing voltage signal according to the second sensing voltage signal;
the source driving circuit further includes:
a sensing calculator connected to the source control unit and the sensing controller, for receiving the third sensing voltage signal in response to the seventh control signal, and outputting second compensation data according to the third sensing voltage signal; the second compensation data signal is receivable by the memory device and is used to update compensation data stored by the memory device.
According to a second aspect of the present disclosure, there is provided a driving method of a pixel unit, the pixel unit having a data terminal, the driving method comprising:
receiving a source control signal input by a time sequence controller, and generating a control instruction according to the source control signal, wherein the control instruction comprises a first control signal and a second control signal;
responding to the first control signal, receiving an initial data signal input by the time schedule controller and a compensation data signal input by a storage device, and outputting a first data signal according to the initial data signal and the compensation data signal;
and responding to the second control signal, converting the first data signal to obtain the data voltage signal and outputting the data voltage signal to the data end of the pixel unit.
In an exemplary embodiment of the present disclosure, the control instruction further includes a third control signal, and the driving method further includes:
responding to the third control signal, receiving an externally input optical compensation data signal, and outputting a first compensation data signal according to the optical compensation data signal; the first compensation data signal is receivable by the memory device and is used to update compensation data stored by the memory device.
In an exemplary embodiment of the present disclosure, the pixel unit further includes a sensing terminal, the control instruction further includes a fourth control signal, and the driving method further includes:
outputting a reset signal to a sensing terminal of the pixel unit in response to the fourth control signal, the reset signal enabling resetting of the pixel unit.
In an exemplary embodiment of the present disclosure, the control instructions further include a fifth control signal, a sixth control signal, and a seventh control signal; the driving method further includes:
responding to the fifth control signal, and outputting a first sensing voltage signal to a data terminal of the pixel unit;
responding to the sixth control signal, outputting a floating signal to the sensing end of the pixel unit, receiving a second sensing voltage signal output by the sensing end of the pixel unit, and outputting a third sensing voltage signal according to the second sensing voltage signal;
receiving the third sensing voltage signal in response to the seventh control signal, and outputting a second compensation data signal according to the third sensing voltage signal; the second compensation data signal is receivable by the memory device and is used to update compensation data stored by the memory device.
According to a third aspect of the present disclosure, there is provided a source driving apparatus including:
in the source driver circuit, the source controller is further configured to send an eighth control signal;
and the storage device is connected with the source electrode control unit and the compensation arithmetic unit, is used for storing the compensation data and can respond to the eighth control signal to output the compensation data to the compensation arithmetic unit.
According to a fourth aspect of the present disclosure, a display device is provided, which includes the source driving device.
The source driving circuit is provided with a compensation arithmetic unit which is used for acquiring an initial data signal from a time schedule controller and acquiring a compensation data signal from a storage device so as to output a first data signal (namely the compensated data signal), and the first data signal is converted to obtain a data voltage signal. The source electrode driving circuit can realize the compensation function, so that the source electrode driving circuit can be matched and applied to a time schedule controller without a compensation device, the cost and the design complexity of the time schedule controller matched and applied to the source electrode driving circuit are reduced, the application range of the source electrode driving circuit is further improved, and the cost of electronic equipment applying the source electrode driving circuit is reduced.
Drawings
The above and other features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
Fig. 1 is a schematic structural diagram of a source driving device according to an embodiment of the present disclosure.
Fig. 2 is a schematic structural diagram of a pixel unit according to an embodiment of the disclosure.
Fig. 3 is a schematic flow chart of a source driver circuit driving a pixel unit according to an embodiment of the disclosure.
Fig. 4 is a schematic flow chart illustrating a sensing operation process of a source driving circuit according to an embodiment of the disclosure.
Fig. 5 is a flowchart illustrating a driving method of a pixel unit according to an embodiment of the disclosure.
Fig. 6 is a schematic structural diagram of a source driving device according to an embodiment of the disclosure.
Fig. 7 is a schematic structural diagram of a display device according to an embodiment of the present disclosure.
The numerical description of the main elements in the figures includes:
100. a source driving device; 110. a source driver circuit; 111. a source control unit; 1111. a source electrode controller; 1112. a data controller; 112. a compensation operator; 113. a data outputter; 114. a sensing controller; 115. a sensing calculator; 120. a storage device; 121. a storage controller; 122. a memory; 130. a circuit board; 200. a time schedule controller; 300. a gate drive circuit; 400. a display panel; 410. a pixel unit.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure.
The terms "a," "an," "the," and the like are used to denote the presence of one or more elements/components/parts; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc. The terms "first" and "second", etc. are used merely as labels, and are not limiting on the number of their objects.
In the display field, especially in the OLED display field, the color gamut is wide, the viewing angle is wide, the OLED display field is thin, the OLED display field is light, the power consumption is low, the contrast is high, and the OLED display field is widely accepted by people due to excellent functions, and the OLED display field is gradually becoming the development direction of the future display technology. However, in the field of large-sized OLEDs, such as large-sized OLED TVs, instability of TFTs (thin film transistors) causes a reduction in picture quality.
In the related art, compensation methods for improving image quality mainly include TFT compensation, OLED compensation, external optical compensation, temperature compensation, and the like, and a compensation device for executing a compensation algorithm is mainly performed in a timing controller (TCON board). The arrangement of the compensation device makes the timing controller need to perform DDR (double data rate) control, and causes a specification requirement of an FPGA (Field-Programmable Gate Array) device of the timing controller to be higher, thereby causing a cost of the timing controller to be higher.
The present disclosure provides a source driving circuit 110 for outputting a data voltage signal to a data terminal of a pixel unit 410. The source driver circuit 110 may be a source driver integrated circuit (source driver IC) or the like.
As shown in fig. 1, the source driving circuit 110 includes a source control unit 111, a compensation operator 112, and a data outputter 113. Wherein the content of the first and second substances,
the source control unit 111 is configured to receive a source control signal input by the timing controller 200, and send a control instruction according to the source control signal; the control instructions may include a first control signal and a second control signal;
the compensation operator 112 is connected to the source control unit 111, and is configured to receive an initial data signal input from the timing controller 200 and a compensation data signal input from the storage device 120 in response to the first control signal, and output a first data signal according to the initial data signal and the compensation data signal;
the data output unit 113 is connected to the source control unit 111 and the compensation operator 112, and is configured to convert the first data signal in response to the second control signal to obtain a data voltage signal and output the data voltage signal to the data terminal of the pixel unit 410.
The source driving circuit 110 provided by the present disclosure is provided with a compensation operator 112 for obtaining an initial data signal from the timing controller 200 and a compensation data signal from the storage device 120, and further outputting a first data signal (i.e., a compensated data signal), which is converted to obtain a data voltage signal. The source driving circuit 110 can implement a compensation function, so that it can be matched and applied to the timing controller 200 without a compensation device, thereby reducing the cost and design complexity of the timing controller 200 matched and applied to it, further improving the application range of the source driving circuit 110, and reducing the cost of the electronic device applying the source driving circuit 110.
Each component of the source control unit 111 provided in the embodiments of the present disclosure is described in detail below with reference to the drawings.
The source driving circuit 110 provided by the present disclosure is used for outputting a data voltage signal to a data terminal of the pixel unit 410. It is understood that the display device may include a plurality of pixel units 410, and the structures of the pixel units 410 may be different according to the kinds of the display devices and the compensation methods thereof; the pixel cell 410 generally includes an optical component and a control component. For example, in the case of an OELD display device, the optical element is an organic light emitting device, and the control element is a control circuit for controlling the light emission of the organic light emitting device.
Referring to fig. 2, a 3T1C (3 tfts, a capacitor) pixel cell 410 of an OLED display device is illustrated and described as an example of a component of the pixel cell 410. The pixel unit 410 includes an OLED device having one terminal connected to the cathode voltage ELVSS and the other terminal connected to a first terminal of the switching thin film transistor T1. The second end of the switching thin film transistor T1 is connected with the anode voltage ELVDD; the gate terminal of the switching thin film transistor T1 is connected to the first terminal of the switching thin film transistor T1 through the capacitor Cst; the gate of the switching thin film transistor T1 is also connected to the first terminal of the driving thin film transistor T2. The second terminal of the driving thin film transistor T2 is connected to the data line DL, and the gate terminal of the driving thin film transistor T2 is connected to the first gate line GL 1. The first terminal of the switching thin film transistor T1 is connected to the first terminal of the sensing thin film transistor T3, the second terminal of the sensing thin film transistor T3 is connected to the sensing wire SL, and the gate terminal of the sensing thin film transistor T3 is connected to the second gate wire GL 2. Thus, the pixel unit 410 has a data terminal and a sensing terminal, wherein the data terminal is the second terminal of the driving TFT T2, and the sensing terminal is the second terminal of the sensing TFT T3.
As shown in fig. 1, the Source Control unit 111 may include a Source controller 1111, and the Source controller 1111 may be connected to the timing controller 200, and configured to receive a Source Control Signal (SCS) sent by the timing controller 200 and send a corresponding Control command according to the SCS. In one embodiment, the source control signal may be generated by the timing controller 200 according to a received external timing control signal (timing).
It is understood that, according to the received source control signal and the data processing beat, the control instruction issued by the source controller 1111 may include one or more different control signals, and the different control signals may be received and responded by different processing units/devices/circuits.
As shown in fig. 1, the compensation operator 112 may be connected to the source controller 1111. The compensation operator 112 may receive the initial data signal input by the timing controller 200 and receive the compensation data signal input by the memory device 120 in response to the first control signal. The initial data signal may be generated by the timing controller 200 according to received externally input pixel data (e.g., RGB data). The storage device 120 may store compensation data therein, and may transmit the compensation data signal to the compensation operator 112. The compensation data may comprise characteristic values (e.g. threshold voltage V) of different driving TFTsthMobility K, etc.), characteristic values (e.g. threshold voltage V) of the different OLED devicesOLED) And optical compensation characteristic values, and may also include other types of compensation data.
In one embodiment, the control command issued by the source control unit 111 may include an eighth control signal, and the eighth control signal may be transmitted to the storage device 120 and responded by the storage device 120 to output the compensation data stored therein to the compensation operator 112.
As shown in fig. 1, in an embodiment, the control instruction issued by the source control unit 111 may include a third control signal, and the compensation operator 112 may further receive an externally input optical compensation data signal in response to the third control signal, and output a first compensation data signal according to the optical compensation data signal; the first compensation data signal can be received by the memory device 120 and used to update the compensation data stored by the memory device 120.
The optical compensation data may be received by the timing controller 200 and forwarded to the compensation operator 112, and the compensation operator 112 may convert the optical compensation data into the first compensation data through a simple operation and transmit the first compensation data to the corresponding storage device 120 through the first compensation data signal; the storage device 120 may update its stored compensation data according to the first compensation data after receiving the first compensation data signal.
It will be appreciated that updating the compensation data may comprise two forms. In one form, the storage device 120 has no compensation data in the optical compensation aspect, and the storage device 120 stores the first compensation data directly as part of the compensation data. In a second form, if the optical compensation aspect data is already present in the storage device 120, the first compensation data is substituted for the original optical compensation aspect data. Of course, the updated compensation data may also include other feasible forms, so that the updated storage data can embody the first compensation data.
In another embodiment, as shown in fig. 1, the control command issued by the source control unit 111 may include a ninth control signal, the ninth control signal may be transmitted to the storage device 120 and responded by the storage device 120, and the storage device 120 receives the first compensation data signal sent by the compensation operator 112 and updates the compensation data stored therein according to the first compensation data signal.
The data outputter 113 may include a digital-to-analog converter for converting the first data signal into an analog signal under the control of the second control signal to obtain the data voltage signal.
As shown in fig. 1, in one embodiment, in order to ensure normal display and reset of the pixel unit 410, the control command issued by the source controller 1111 may include a fourth control signal; the source driving circuit 110 may further include a sensing controller 114, and the sensing controller 114 may be connected to the source controller 1111 and configured to output a reset signal to the sensing terminal of the pixel unit 410 in response to a fourth control signal, the reset signal being capable of resetting the pixel unit 410.
As shown in fig. 3, the driving process of the pixel unit 410 by the source driving circuit 110 may be performed as follows:
step S110, receiving a source control signal input by the timing controller 200, and generating a control instruction according to the source control signal, where the control instruction includes a first control signal, a second control signal, and a fourth control signal;
step S120 of receiving an initial data signal input from the timing controller 200 and a compensation data signal input from the memory device 120 in response to the first control signal, and outputting a first data signal according to the initial data signal and the compensation data signal;
step S130, responding to the second control signal, converting the first data signal to obtain a data voltage signal, and outputting the data voltage signal to the data terminal of the pixel unit 410;
in step S140, in response to the third control signal, a reset signal is output to the sensing terminal of the pixel unit 410, and the reset signal can reset the pixel unit 410.
In order to enable the compensation data to timely and accurately reflect parameters such as characteristic values of the driving thin film transistors of the pixel units 410, the source driving circuit 110 may be further configured to enable sensing of the pixel units 410 and forming corresponding compensation data.
As shown in fig. 1, in an embodiment, the control instruction may further include a fifth control signal, a sixth control signal, and a seventh control signal, and the data outputter 113 is further configured to output the first sensing voltage signal to the data terminal of the pixel unit 410 in response to the fifth control signal; the sensing controller 114 is further configured to output a Floating (Floating, also called Floating) signal to the sensing terminal of the pixel unit 410 in response to the sixth control signal, receive a second sensing voltage signal output by the sensing terminal of the pixel unit 410, and output a third sensing voltage signal according to the second sensing voltage signal; the source driving circuit 110 may further include a sensing calculator connected to the source control unit 111 and the sensing controller 114, for receiving a third sensing voltage signal in response to a seventh control signal, and outputting a second compensation data signal according to the third sensing voltage signal; the second compensation data signal can be received by the memory device 120 and used to update the compensation data stored by the memory device 120.
The principle of the sensing operation process is that the data output device 113 outputs a first sensing voltage signal to the data terminal of the pixel unit 410 through the data lead, so that the pixel unit 410 is charged. Then the sensing controller 114 outputs a floating signal to the sensing terminal of the pixel unit 410 through the sensing lead; the sensing lead is charged inside the pixel unit 410 through the sensing terminal of the pixel unit 410 to form a second sensing voltage signal. At this time, the sensing controller 114 receives and analog-to-digital converts the second sensing voltage signal on the sensing line to obtain a third sensing voltage signal and outputs the third sensing voltage signal to the sensing calculator. The sensing calculator outputs the second compensation data to the storage device 120 according to the third sensing voltage signal, and the storage device 120 may receive the second compensation data and update the stored compensation data.
The sensing operation process of the source driving circuit 110 may include the following steps:
step S210, receiving a source control signal input by the timing controller 200, and generating a control instruction according to the source control signal, where the control instruction includes a fifth control signal, a sixth control signal, and a seventh control signal;
step S220, responding to the fifth control signal, outputting the first sensing voltage signal to the data terminal of the pixel unit 410;
step S230, responding to the sixth control signal, outputting a floating signal to the sensing terminal of the pixel unit 410, receiving a second sensing voltage signal output by the pixel unit 410 from the sensing terminal thereof in response to the first sensing voltage signal, and outputting a third sensing voltage signal according to the second sensing voltage signal;
step S240, responding to the seventh control signal, outputting a second compensation data signal according to the third sensing voltage signal; the second compensation data signal can be received by the memory device 120 and used to update the compensation data stored by the memory device 120.
It is understood that a plurality of different pixel units 410 can be included in the display device, and the source driving circuit 110 provided by the present disclosure does not need to obtain the second compensation data of each pixel unit 410 simultaneously during the same sensing operation. The second compensation data of one or several pixel units 410 can be obtained in each sensing operation process, and the second compensation data of all the pixel units 410 can be obtained through multiple sensing operation processes in a set period.
As shown in fig. 1, in an embodiment, the control instruction issued by the source control unit 111 may include a tenth control signal, the tenth control signal may be transmitted to the storage device 120 and responded by the storage device 120, and the storage device 120 receives the second compensation data signal sent by the sensing calculator and updates the compensation data stored therein according to the second compensation data signal.
As shown in fig. 1, in an embodiment, the source control unit 111 may further include a data controller 1112 for controlling the sensing calculator and the storage device 120. The data controller 1112 may be connected to the source controller 1111, the sensing calculator and the storage device 120. Source controller 1111 may send commands to data controller 1112 and control instructions to sense calculator and memory device 120 based on the received commands by data controller 1112. For example, a seventh control signal, an eighth control signal, a ninth control signal, and a tenth control signal may be issued by the data controller 1112.
The present disclosure also provides a driving method of a pixel unit 410, where the pixel unit 410 has a data terminal, as shown in fig. 5, the driving method of the pixel unit 410 includes:
step S310, receiving a source control signal input by the timing controller 200, and generating a control instruction according to the source control signal, where the control instruction includes a first control signal and a second control signal;
step S320 of receiving an initial data signal input from the timing controller 200 and a compensation data signal input from the memory device 120 in response to the first control signal, and outputting a first data signal according to the initial data signal and the compensation data signal;
in step S330, the first data signal is converted to obtain a data voltage signal in response to the second control signal, and the data voltage signal is output to the data terminal of the pixel unit 410.
In one embodiment, the control command further includes a third control signal, and the driving method further includes:
responding to a third control signal, receiving an externally input optical compensation data signal, and outputting a first compensation data signal according to the optical compensation data signal; the first compensation data signal can be received by the memory device 120 and used to update the compensation data stored by the memory device 120.
In an embodiment, the pixel unit 410 further includes a sensing terminal, the control instruction further includes a fourth control signal, and the driving method further includes:
in response to the fourth control signal, a reset signal is output to the sensing terminal of the pixel unit 410, and the reset signal can reset the pixel unit 410.
In one embodiment, the control instructions further comprise a fifth control signal, a sixth control signal, and a seventh control signal; the driving method further includes:
outputting the first sensing voltage signal to the data terminal of the pixel unit 410 in response to the fifth control signal;
in response to the sixth control signal, outputting a floating signal to the sensing terminal of the pixel unit 410, receiving a second sensing voltage signal output by the sensing terminal of the pixel unit 410, and outputting a third sensing voltage signal according to the second sensing voltage signal;
responding to the seventh control signal, receiving a third sensing voltage signal, and outputting second compensation data according to the third sensing voltage signal; the second compensation data signal can be received by the memory device 120 and used to update the compensation data stored by the memory device 120.
Specific implementation details and advantageous effects of the driving method of the pixel unit 410 provided by the present disclosure have been described in detail in the foregoing embodiments of the source driving circuit 110, and the present disclosure is not repeated herein.
It should be noted that although the various steps of the methods of the present disclosure are depicted in the drawings in a particular order, this does not require or imply that these steps must be performed in this particular order, or that all of the depicted steps must be performed, to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions, etc., are all considered part of this disclosure.
The present disclosure also provides a source driving apparatus 100, as shown in fig. 1 and 6, the source driving apparatus 100 includes any one of the source driving circuits 110 described in the foregoing embodiments of the source driving circuit 110, and further includes a storage apparatus 120. The storage device 120 may be connected to at least the source control unit 111 and the compensation operator 112, and is configured to store the compensation data, and output the compensation data to the compensation operator 112 in response to an eighth control signal from the source control unit 111.
The source driving circuit 110 adopted by the source driving device 100 of the embodiment of the present disclosure is the same as the source driving circuit 110 in the embodiment of the source driving circuit 110, and therefore, the source driving circuit has the same beneficial effects, and is not described herein again.
In one embodiment, the memory device 120 may be the same as the memory device 120 described in the above embodiment of the source driver circuit 110, and the function and function thereof will not be described in detail.
As shown in fig. 1, the storage device 120 may structurally include a memory 122 and a storage controller 121 connected to each other, wherein the memory 122 is used for storing compensation data, and the storage controller 121 is connected to the memory 122 and the source driving circuit 110 and is used for receiving and responding to a control instruction sent by the source control unit 111.
As shown in fig. 1, in one embodiment, the memory controller 121 may receive and respond to the eighth control signal issued by the source control unit 111, and send a read offset data command to the memory 122; the memory 122 transmits the compensation data to the memory controller 121 in response to the read compensation data command; the memory controller 121 sends the compensation data to the compensation operator 112. In another embodiment, the memory controller 121 may also send a feedback signal that has transmitted the compensation data to the source control unit 111, and the source control unit 111 may control the compensation operator 112 to receive the compensation data according to the feedback signal.
In another embodiment, as shown in fig. 1, the memory controller 121 may receive and respond to the ninth control signal or the tenth control signal, so that the memory 122 may receive the first compensation data or the second compensation data and update the compensation data according to the first compensation data or the second compensation data.
The number of the source driving circuits 110 in the source driving device 100 may be plural, and the number of the control storage devices 120 may also be plural and may be provided in one-to-one correspondence with the source driving circuits 110. For example, as shown in fig. 6, the source driving device 100 may further include a circuit board, such as a PLC circuit board, on which a plurality of source driving circuits 110 are disposed, and each source driving circuit 110 is connected to a corresponding storage device 120.
The present disclosure also provides a display device, and the source driving device 100 of the display device is the source driving device 100 described in the foregoing embodiment of the source driving device 100, and therefore has the same beneficial effects, and the details of the disclosure are not repeated herein.
For example, as shown in fig. 7, in an embodiment, the display device may further include a timing controller 200, a source driving device 100, a gate driver, and a display panel 400, wherein the display panel 400 is provided with a pixel unit 410. The timing controller 200 is configured to receive externally input pixel data (e.g., RGB data) and timing control signals timing, and output initial data signals and source control signals SCS to the source driving device 100 according to the pixel data and timing control signals timing, and the source driving device 100 drives the pixel unit 410 using the sensing wire SL and the data wire DL according to the initial data signals and the source control signals SCS. The timing controller 200 outputs a gate control signal GCS to the gate driver according to the pixel data and the timing control signal timing, and the gate driver controls on or off of each thin film transistor in the pixel unit 410 through the first and second gate wirings according to the gate control signal GCS.
It is understood that the timing controller 200 may not include a compensation device, the structure thereof may be simplified and the requirement for the specification of the device may be reduced, which may reduce the cost of the timing controller 200. Moreover, the interface portion of the timing controller 200 may be the same as the interface portion of the timing controller of other display devices that do not need compensation, so that it may use the design and manufacturing method of other timing controllers to reduce the complexity of the design of the timing controller 200 and further reduce the cost of the timing controller 200.
It is to be understood that the disclosure is not limited in its application to the details of construction and the arrangements of the components set forth in the specification. The present disclosure is capable of other embodiments and of being practiced and carried out in various ways. The foregoing variations and modifications are within the scope of the present disclosure. It should be understood that the disclosure disclosed and defined in this specification extends to all alternative combinations of two or more of the individual features mentioned or evident from the text and/or drawings. All of these different combinations constitute various alternative aspects of the present disclosure. The embodiments described in this specification illustrate the best mode known for carrying out the disclosure and will enable those skilled in the art to utilize the disclosure.
Claims (10)
1. A source driving circuit for outputting a data voltage signal to a data terminal of a pixel unit; wherein the source driving circuit comprises:
the source control unit is used for receiving a source control signal input by the time sequence controller and sending a control instruction according to the source control signal; the control instruction comprises a first control signal and a second control signal;
the compensation arithmetic unit is connected with the source electrode control unit and used for responding to the first control signal, receiving an initial data signal input by the time schedule controller and a compensation data signal input by a storage device and outputting a first data signal according to the initial data signal and the compensation data signal;
and the data output device is connected with the source electrode control unit and the compensation arithmetic device and used for responding to the second control signal, converting the first data signal to obtain the data voltage signal and outputting the data voltage signal to the data end of the pixel unit.
2. The source driver circuit of claim 1, wherein the control command further comprises a third control signal:
the compensation operator is further used for responding to the third control signal, receiving an externally input optical compensation data signal and outputting a first compensation data signal according to the optical compensation data signal; the first compensation data signal is receivable by the memory device and is used to update compensation data stored by the memory device.
3. The source driver circuit of claim 1, wherein the pixel cell further comprises a sense terminal; the control instruction further comprises a fourth control signal;
the source driving circuit further includes:
and the sensing controller is connected with the source control unit and used for responding to the fourth control signal and outputting a reset signal to the sensing end of the pixel unit, and the reset signal can reset the pixel unit.
4. The source driver circuit of claim 3, wherein the control instructions further comprise a fifth control signal, a sixth control signal, and a seventh control signal,
the data outputter is further used for responding to the fifth control signal and outputting a first sensing voltage signal to the data end of the pixel unit;
the sensing controller is further configured to output a floating signal to the sensing terminal of the pixel unit in response to the sixth control signal, receive a second sensing voltage signal output by the sensing terminal of the pixel unit, and output a third sensing voltage signal according to the second sensing voltage signal;
the source driving circuit further includes:
a sensing calculator connected to the source control unit and the sensing controller, for receiving the third sensing voltage signal in response to the seventh control signal, and outputting second compensation data according to the third sensing voltage signal; the second compensation data signal is receivable by the memory device and is used to update compensation data stored by the memory device.
5. A method of driving a pixel cell, the pixel cell having a data terminal, comprising:
receiving a source control signal input by a time sequence controller, and generating a control instruction according to the source control signal, wherein the control instruction comprises a first control signal and a second control signal;
responding to the first control signal, receiving an initial data signal input by the time schedule controller and a compensation data signal input by a storage device, and outputting a first data signal according to the initial data signal and the compensation data signal;
and responding to the second control signal, converting the first data signal to obtain a data voltage signal and outputting the data voltage signal to the data end of the pixel unit.
6. The method of driving the pixel unit according to claim 5, wherein the control instruction further includes a third control signal, the method further comprising:
responding to the third control signal, receiving an externally input optical compensation data signal, and outputting a first compensation data signal according to the optical compensation data signal; the first compensation data signal is receivable by the memory device and is used to update compensation data stored by the memory device.
7. The method of driving the pixel cell of claim 5, wherein the pixel cell further comprises a sensing terminal, wherein the control command further comprises a fourth control signal, and wherein the method further comprises:
outputting a reset signal to a sensing terminal of the pixel unit in response to the fourth control signal, the reset signal enabling resetting of the pixel unit.
8. The method of driving the pixel unit according to claim 7, wherein the control command further includes a fifth control signal, a sixth control signal, and a seventh control signal; the driving method further includes:
responding to the fifth control signal, and outputting a first sensing voltage signal to a data terminal of the pixel unit;
responding to the sixth control signal, outputting a floating signal to the sensing end of the pixel unit, receiving a second sensing voltage signal output by the sensing end of the pixel unit, and outputting a third sensing voltage signal according to the second sensing voltage signal;
receiving the third sensing voltage signal in response to the seventh control signal, and outputting a second compensation data signal according to the third sensing voltage signal; the second compensation data signal is receivable by the memory device and is used to update compensation data stored by the memory device.
9. A source driving apparatus, comprising:
the source electrode driving circuit of any one of claims 1 to 4, wherein the source electrode control unit is further configured to issue an eighth control signal;
and the storage device is connected with the source electrode control unit and the compensation arithmetic unit, is used for storing the compensation data and can respond to the eighth control signal to output the compensation data to the compensation arithmetic unit.
10. A display device comprising the source driving device according to claim 9.
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| KR100864917B1 (en) * | 2001-11-03 | 2008-10-22 | 엘지디스플레이 주식회사 | Mehtod and apparatus for driving data of liquid crystal display |
| KR101065418B1 (en) * | 2010-02-19 | 2011-09-16 | 삼성모바일디스플레이주식회사 | Display device and driving method thereof |
| KR102014853B1 (en) * | 2013-08-19 | 2019-08-28 | 엘지디스플레이 주식회사 | Organic Light Emitting Display Device and Driving Method thereof |
| CN104064141B (en) * | 2014-06-12 | 2016-12-14 | 京东方科技集团股份有限公司 | Display floater optical compensating member, display floater and optical compensation method |
| KR102216705B1 (en) * | 2015-06-30 | 2021-02-18 | 엘지디스플레이 주식회사 | Source driver ic, controller, organic light emitting display panel, organic light emitting display device, and the method for driving the organic light emitting display device |
| CN105931612B (en) * | 2016-07-13 | 2018-12-21 | 京东方科技集团股份有限公司 | source electrode drive circuit, method and display device |
| CN107068049B (en) * | 2017-06-07 | 2020-05-29 | 京东方科技集团股份有限公司 | Image display driving device, display device and electrical compensation method |
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