CN113348499A - Display device and display driving method - Google Patents
Display device and display driving method Download PDFInfo
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- CN113348499A CN113348499A CN201980079847.4A CN201980079847A CN113348499A CN 113348499 A CN113348499 A CN 113348499A CN 201980079847 A CN201980079847 A CN 201980079847A CN 113348499 A CN113348499 A CN 113348499A
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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]
- G09G3/3225—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
- G09G3/3233—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 current through the light-emitting element
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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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
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Abstract
A display driving method is applied to a display device (100), the display device (100) comprises a data driving circuit (1), a scanning driving circuit (2) and a plurality of pixel units (3) which are arranged in an array, the pixel units (3) which are arranged in the array are divided into at least two display partitions (A1), and each display partition (A1) comprises at least one row of pixel units (3); adjusting a scan voltage applied to at least one row of pixel cells (3) in each display partition (a1) according to a conduction distance of the data driving circuit (1) applying the data voltage to each display partition (a1), wherein the scan voltage is positively correlated with the conduction distance; and sequentially supplying the adjusted scanning voltage to at least one pixel unit (3) in each display partition (A1) through the scanning driving circuit (2). When the attenuation of the data voltage applied to the display subarea (A1) by the data driving circuit (1) is increased due to the increase of the conduction distance, the attenuation of the data voltage can be effectively compensated by increasing the scanning voltage, and the uniformity of the light emission is maintained.
Description
The present disclosure relates to a display technology, and more particularly, to a display device and a display driving method for the display device.
Currently, display devices such as OLED (Organic Light Emitting Diode) display panels/display screens are widely used. The AMOLED (Active Matrix Organic Light Emitting Diode) display device is the most commonly used type of OLED display device due to its high display performance and low power consumption. In the current AMOLED display device, the driving voltage output by the data driver is applied to the pixels in the corresponding column gated by the row scan through each column data line in a manner of driving the data driver through the row scan and the column data line. However, since the data lines themselves have impedance, voltage drop is caused to the data voltage outputted by the data driver, and the voltage drop is larger as the conduction distance of the data voltage increases, so that the data voltage received by the pixels farther away from the data driver is smaller, and the light emitting brightness of the pixels depends on the applied data voltage, thereby causing the AMOLED display device to emit light unevenly.
Disclosure of Invention
The present application provides a display device and a display driving method, which can compensate for attenuation of data voltage due to a conduction distance and improve light emission uniformity of the display device.
An embodiment of the present application provides a display device, which includes a data driving circuit, a scan driving circuit, and a plurality of pixel units arranged in an array. The pixel units arranged in an array are divided into at least two display partitions, and each display partition comprises at least one row of pixel units. The data driving circuit is electrically connected with the pixel units in the rows through a plurality of data lines respectively and used for providing data voltage for the pixel units in the corresponding rows according to the content to be displayed. The scanning driving circuit is electrically connected with the plurality of rows of pixel units through a plurality of scanning lines respectively and used for providing scanning voltage for each row of pixel units in sequence, wherein the scanning driving circuit adjusts the scanning voltage applied to at least one row of pixel units in each display subarea according to the conduction distance of the data driving circuit applied to each display subarea, and the scanning voltage applied to at least one row of pixel units in each display subarea by the scanning driving circuit is positively correlated with the conduction distance of the data driving circuit applied to each display subarea.
Another embodiment of the present application provides a display driving method applied to a display device, where the display device includes a data driving circuit, a scan driving circuit, and a plurality of pixel units arranged in an array, where the pixel units arranged in the array are divided into at least two display partitions, each of the display partitions includes at least one row of pixel units, and the display driving method includes: adjusting a scanning voltage applied to at least one row of pixel units in each display subarea according to a conduction distance of a data driving circuit for applying a data voltage to each display subarea, wherein the scanning voltage applied to at least one row of pixel units in each display subarea by the scanning driving circuit is positively correlated with the conduction distance of the data driving circuit for applying the data voltage to each display subarea; and sequentially providing the adjusted scanning voltage for at least one pixel unit in each display subarea through the scanning driving circuit.
In the application, when the attenuation of the data voltage applied to the display partition by the data driving circuit is increased due to the increase of the conduction distance, the attenuation of the data voltage can be effectively compensated by increasing the scanning voltage, so that the voltage supplied to the light emitting device in the pixel unit is approximately kept unchanged, and the uniformity of light emission is maintained.
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display device in an embodiment of the present application.
Fig. 2 is a schematic plan view illustrating each display partition of the display device according to an embodiment of the present application.
Fig. 3 is a schematic plan view illustrating each display section of a display device according to another embodiment of the present application.
Fig. 4 is a schematic structural diagram of a pixel unit in an embodiment of the present application.
Fig. 5 is a schematic diagram illustrating a relationship between a conduction level of a switching tube and a gate-source voltage in an embodiment of the present application.
Fig. 6 is a more detailed structural diagram of a display device according to an embodiment of the present application.
Fig. 7 is a flowchart illustrating a display driving method according to an embodiment of the present application.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 1 is a schematic structural diagram of a display device 100 according to an embodiment of the present application.
As shown in fig. 1 and fig. 2, the display device 100 includes a data driving circuit 1, a scan driving circuit 2, and a plurality of pixel units 3 arranged in an array. Each pixel unit 3 may correspond to one pixel point forming the display device 100. The data driving circuit 1 and the scan driving circuit 2 are coupled to the plurality of pixel units 3 arranged in an array.
The data driving circuit is electrically connected to the pixel units 3 in the corresponding column through a plurality of data lines D1, and is configured to provide data voltages to the pixel units 3 in the corresponding column according to the content to be displayed.
The scan driving circuit 2 is electrically connected to the rows of pixel units 3 through a plurality of scan lines G1, respectively, for sequentially providing scan voltages to each row of pixel units 3, wherein the scan driving circuit 2 adjusts the scan voltage applied to at least one row of pixel units 3 in each display partition a1 according to the conduction distance of the data driving circuit 1 applying the data voltage to each display partition a1, and the scan voltage applied to at least one row of pixel units 3 in each display partition a1 by the scan driving circuit 2 is positively correlated to the conduction distance of the data driving circuit 1 applying the data voltage to each display partition a 1.
Accordingly, when the attenuation of the data voltage applied to the display section by the data driving circuit increases due to the increase of the conduction distance, the attenuation of the data voltage can be effectively compensated by increasing the scan voltage.
Specifically, as the data driving circuit 1 applies the data voltage to the display partition a1 with a longer conduction distance, the scan driving circuit 2 applies a larger scan voltage, so that the switch tube in the pixel unit 3 in the corresponding display partition a1 is turned on to a higher degree, the resistance value of the switch tube is smaller, and the divided voltage is smaller, so that even if the data voltage is attenuated due to the increase of the conduction distance, the voltage supplied to the light emitting device in the pixel unit 3 can be kept substantially constant by adjusting the scan voltage, and the uniformity of the light emission of the whole display device 100 is maintained.
As shown in fig. 1, each data line D1 is connected to at least one row of pixel units 3 in the display partition a1 in sequence, and the data driving circuit 1 applies data voltages to each display partition a1 for a distance L of the data line D1 connected between the data driving circuit 1 and each display partition a 1.
That is, as shown in fig. 1, one end of each data line D1 is connected to the data driving circuit 1, and the other end thereof extends through each display partition a1 in turn and is connected to the pixel cells 3 of the corresponding column in the corresponding display partition a 1. Accordingly, the data driving circuit 1 applies the corresponding data voltage to the pixel units 3 in the corresponding column of each display partition a1 through the data line D1, and the conduction distance of the data driving circuit 1 applying the data voltage to each display partition a1 is the length L of the data line D1 connected between the data driving circuit 1 and each display partition a 1.
As shown in fig. 1, further, the data driving circuit 1 includes a plurality of data driving interfaces P1, each data line D1 is connected to a corresponding data driving interface P1 and sequentially extends through at least one row of pixel cells 3 in each display partition a1 of a corresponding column to be sequentially connected to at least one row of pixel cells 3 in each display partition a1, and the length of the data line D1 connected between the data driving circuit 1 and each display partition a1 is determined by the length between the connection point N1 of at least one row of pixel cells 3 in each display partition a1 connected to the data line D1 and the corresponding data driving interface P1.
In some embodiments, when a certain display partition a1 includes at least two rows of pixel units 3, the length of the data line D1 connected between the data driving circuit 1 and the display partition a1 is: each row of pixel cells 3 within the display partition a1 is connected to an average of the distance between the connection point N1 of the data line D1 and the corresponding data driving interface P1 in the data driving circuit 1.
For example, as shown in fig. 1, the uppermost display partition a1 includes two rows of pixel units 3, a distance between a connection point N11 of the first row of pixel units 3 connected to the data line D1 and a data driving interface P1 corresponding to the data driving circuit 1 is D1, and a distance between a connection point N12 of the second row of pixel units 3 connected to the data line D1 and a corresponding data driving interface P1 in the data driving circuit 1 is D2. Then, the length of the data line D1 connected between the data driving circuit 1 and the display partition a1 may be (D1+ D2)/2.
In other embodiments, when a certain display partition a1 includes at least two rows of pixel units 3, the length of the data line D1 connected between the data driving circuit 1 and the display partition a1 is: the distance between the connection point N1 of any row of pixel units 3 in the display subarea A connected to the data line D1 and the data driving circuit 1.
For example, as shown in fig. 1, the distance between the connection point N11 of the first row of pixel cells 3 connected to the data line D1 and the corresponding data driving interface P1 in the data driving circuit 1 is D1, and the distance between the connection point N12 of the second row of pixel cells 3 connected to the data line D1 and the corresponding data driving interface P1 in the data driving circuit 1 is D2. Then, the length of the data line D1 connected between the data driving circuit 1 and the display partition a1 may be D1 or D2.
In the present application, the distances from the different data lines D1 connected by the different data driving interfaces P1 of the data driving circuit 1 to the pixel units 3 in different columns of the same display partition a1 are equal, so that the distance between the connection point N1 of the pixel unit 3 and the data line D1 in a certain row of the display partition a1 and the corresponding data driving interface P1 can be regarded as the distance between the connection point N1 of all the pixel units 3 in the row of the pixel unit 3 and the data line D1 and the corresponding data driving interface P1. Therefore, the distance between the connection point N1, at which a row of pixel cells 3 are connected to the data line D1, and the data driving circuit 1 in this application refers to: the distance between the connection point N1 where the pixel units 3 in any column of the row of pixel units 3 are connected to the corresponding data line D1 and the data driving interface P1 of the data driving circuit 1.
The number of rows of the pixel units 3 included in the different display sections a1 may be the same or different.
Please refer to fig. 2, which is a schematic plan view illustrating each display partition a1 of the display device 100 according to an embodiment of the present application. As shown in fig. 2, each display section a1 includes the same number of rows of pixel cells 3.
Please refer to fig. 3, which is a schematic plan view illustrating each display partition a1 of the display device 100 according to another embodiment of the present application. As shown in fig. 3, different display sections a1 include different numbers of rows of pixel elements 3.
Obviously, in other embodiments, the number of rows of pixel units 3 included in the partial display partition a1 in the display device 100 may be the same, and the number of rows of pixel units 3 included in the partial display partition a1 may be different.
In some embodiments, each display partition a1 includes a number of rows of pixel cells 3 less than or equal to a predetermined number to ensure that data voltages of different rows of the same display partition a1 decay substantially equally due to conduction distance and that the light emission luminances of the pixel cells 3 are substantially equal, and that adjusting the light emission luminances of the display partition a1 to be substantially equal to the light emission luminances of the other display partitions a1 can be achieved by applying the same scan voltage.
Wherein the preset number may be preset according to the resolution and the screen size of the display apparatus 100. Specifically, the number of lines included in the unit preset distance of the display device 100 may be obtained according to the resolution and the screen size of the display device 100, and the number of lines included in the unit preset distance may be used as the preset number.
The unit preset distance is a physical distance in millimeter, and the rows of pixel units 3 within the unit preset distance can be regarded as a whole, that is, attenuation caused by the conduction distance is approximately the same, the light emitting brightness of the pixel units 3 is approximately equal, and the like. The unit preset distance may be 0.2 mm in value.
Fig. 4 is a schematic structural diagram of the pixel unit 3. Each pixel unit 3 has the same structure, and as shown in fig. 4, only a specific structure of one pixel unit is shown for description. Each pixel unit 3 may include a light emitting display device J1 and a pixel driving circuit 32, where the pixel driving circuit 32 is configured to drive the corresponding light emitting display device J1 to emit light.
Each pixel driving circuit 32 includes a scan switch transistor T1 and a driving switch transistor T2. The driving control circuit 1 further includes a driving power supply (not shown) for supplying a positive voltage ELVDD.
As shown in fig. 4, the driving switch tube T2 of each pixel unit 3 is electrically connected between the positive voltage ELVDD, the scanning switch tube T1 of the same pixel unit 3, and the positive terminal V + of the light emitting display device J1 of the same pixel unit 3. The negative terminal V-of the light emitting display device J1 of each pixel unit 3 is electrically connected to the ground point ELVSS.
Wherein all pixel cells 3 are connected to the same positive voltage ELVDD and ground potential ELVSS.
The gate G of the scan switch transistor T1 is connected to the corresponding scan line G1, and is electrically connected to the scan driving circuit 2 through the corresponding scan line G1.
The drain D of the scan switch transistor T1 is connected to the corresponding data line D1, and is connected to the data driving circuit 1 through the corresponding data line D1, and the source S of the scan switch transistor T1 is connected to the gate of the driving switch transistor T2. The drain D and the source S of the driving switching tube T2 are connected to a positive voltage ELVDD and a positive terminal V + of the light emitting display device J1, respectively.
Accordingly, when the scan voltages applied by the scan driving circuit 2 are different, the gate-source voltage Vgs of the scan switch transistor T1 is different, so that the turn-on degree of the scan switch transistor T1 is different.
Fig. 5 is a schematic diagram showing the relationship between the conduction level of the scan switch transistor T1 and the gate-source voltage Vgs. As shown in fig. 5, the larger the gate-source voltage Vgs before the turn-on threshold is reached, the larger the turn-on degree of the scan switch transistor T1 is, and thus the smaller the resistance value of the scan switch transistor T1 is, the smaller the divided voltage is. Accordingly, when the attenuation of the data voltage increases due to the increase of the conduction distance, the gate-source voltage Vgs increases by increasing the scan voltage, so that the resistance value of the scan switching tube T1 becomes small and the divided voltage decreases. Accordingly, the voltage supplied to the gate of the driving switch transistor T2 can be kept substantially equal to that when the data voltage is not attenuated, or the voltages supplied to the gates of the driving switch transistors T2 in the pixel cells 3 in each display division a1 can be made equal. Accordingly, the driving switching tubes T2 are turned on to the same degree, and the voltage applied to the positive terminal V + of the corresponding light emitting display device J1 by the ELVDD in the pixel unit 3 in each display division a1 is the same. So that the light emission luminances of the pixel cells 3 in all of the display sections a1 can be substantially the same.
The Light Emitting display device J1 includes at least one Organic Light Emitting Diode (OLED) D1. Only one organic light emitting diode D1 is illustrated in fig. 4, and it is apparent that in other embodiments, the light emitting display device J1 may include a plurality of organic light emitting diodes D1 connected in series or in parallel between the positive terminal V + and the negative terminal V-of the light emitting display device J1.
Fig. 6 is a more detailed schematic diagram of a display device according to an embodiment of the present application. As shown in fig. 6, the display device 100 further includes an adjustment controller 4, the adjustment controller 4 is coupled to the scan driving circuit 2, and the adjustment controller 4 is configured to determine a target scan voltage required to be applied to each display partition a1 according to a preset corresponding relationship between a data voltage conducting distance and a scan voltage and a conducting distance applied to each display partition a1 by the current data driving circuit, and output a corresponding control signal to the scan driving circuit 2, so that the scan driving circuit 2 adjusts the scan voltage applied to the pixel unit 3 in each display partition a to the corresponding target scan voltage.
That is, in some embodiments, the display device 100 is preset with a corresponding relationship between the data voltage conducting distance and the scan voltage, and the target scan voltage required to be applied to each display partition a1 can be determined according to the corresponding relationship and the conducting distance applied to each display partition a1 by the data driving circuit, which can be obtained in advance.
In some embodiments, the preset data voltage conducting distance-to-scan voltage correspondence relationship defines a correspondence relationship between a plurality of data voltage conducting distance intervals and a plurality of scan voltages, and the adjusting controller 4 determines a data voltage conducting distance interval in which the conducting distance applied to each display partition a1 by the data driving circuit 1 is located, and then determines a target scan voltage to be applied to each display partition a1 according to the correspondence relationship between the plurality of data voltage conducting distance intervals and the plurality of scan voltages defined in the preset data voltage conducting distance-to-scan voltage correspondence relationship.
Thus, by defining a plurality of intervals in advance, there is no need for one scan voltage per conduction distance, reducing the amount of data calculation and simplifying control.
As shown in fig. 6, the display device 100 further includes a memory 5, and the memory 5 stores therein length data of the data line D1 connected between each display partition a1 and the data driving circuit 1, wherein the length data of the data line D1 connected between each display partition a1 and the data driving circuit 1 is obtained by measurement or further calculation in advance. Wherein the length data is a length value.
For example, as described above, a plurality of distances between the connection point N1 of the plurality of rows of pixel cells 3 of a certain display partition a1 connected to the data line D1 and the data driving interface P1 corresponding to the data driving circuit 1 may be measured in advance, and then an average value of the plurality of distances may be used as the length of the data line D1 connected between the display partition a1 and the data driving circuit 1.
For another example, the distance between the connection point N1 of any row of pixel cells 3 in the display partition a connected to the data line D1 and the data driving circuit 1 may be measured in advance, and the distance between the connection point N1 of any row of pixel cells 3 connected to the data line D1 and the data driving circuit 1 may be used as the length of the data line D1 connected between the display partition a1 and the data driving circuit 1.
The adjusting controller 4 determines the length data of the data line D1 connected between each display partition a1 and the data driving circuit a as the conduction distance applied by the data driving circuit 1 to each display partition a1, and determines the target scan voltage currently required to be applied by each display partition a1 according to the preset corresponding relationship between the conduction distance of the data voltage and the scan voltage and the conduction distance applied by the current data driving circuit to each display partition a 1.
The preset data voltage conducting distance and scanning voltage may be in a corresponding relationship table stored in the memory 5. The preset data voltage conduction distance and scanning voltage corresponding relation can be obtained by analyzing the attenuation brought by different conduction distances in advance and compensating the attenuation by applying a large target scanning.
As shown in fig. 6, the display device 100 further includes a shift (level shift) controller 6, the shift controller 6 is located between the adjusting controller 4 and the scan driving circuit 2, and a control signal output by the adjusting controller 4 is converted by the shift controller 6 and then output to the scan driving circuit 2.
For example, the control signal can be level-and timing-converted by the shift controller 6.
As shown in fig. 6, the display device 100 further includes a timing controller 7, the timing controller 7 is connected to the shift controller 6 and the data driving circuit 1, and the timing controller 7 is configured to generate various corresponding timing signals, output the timing signals to the data driving circuit 1 and output the timing signals to the scan driving circuit 2 through the shift controller 6, and control timing of the data voltage output by the data driving circuit 1 and the scan voltage output by the scan driving circuit 2. For example, the scan driving circuit 2 is controlled to output the scan voltage row by row, and the data driving circuit 1 is controlled to output the data voltage in the corresponding column according to the content to be displayed.
As shown in fig. 6, the display device 100 further includes a power module 8, the power module 8 is configured to supply power to the adjusting controller 4, the timing controller 7, and the like, and the power module 8 may include a DC/DC (direct current to direct current) converter 81 configured to convert the input voltage into a suitable operating voltage to supply power to the adjusting controller 4, the timing controller 7, and the like.
The display device 100 may further include other devices, which are not described herein in detail since they are not related to the improvements of the present application.
The display device 100 is an AMOLED (Active Matrix Organic Light Emitting Diode) display screen, a display panel, or the like. The display screen can also be a mobile phone, a tablet computer, a television, a display and other equipment comprising an AMOLED display screen and a display panel.
The adjusting controller 4 may be a central processing unit, a microcontroller, a microprocessor, a single chip, a digital signal processor, or the like.
The data driving circuit 1 and the scan driving circuit 1 may be two physically independent driving chips, or may be integrated driving chips.
In some embodiments, the division of the display partition a1 may be set by a manufacturer before factory shipment, and the distance between each display partition a1 and the data driving circuit 1 is also predetermined by the manufacturer and stored in the memory 5.
Fig. 7 is a flowchart illustrating a display driving method according to an embodiment of the present application. The display driving method is applied to a display device. The display device comprises a data driving circuit, a scanning driving circuit and a plurality of pixel units arranged in an array, wherein the pixel units arranged in the array are divided into at least two display partitions, each display partition comprises at least one row of pixel units, and the display driving method comprises the following steps:
s701: and adjusting the scanning voltage applied to at least one row of pixel units in each display subarea according to the conduction distance of the data driving circuit for applying the data voltage to each display subarea, wherein the scanning voltage applied to at least one row of pixel units in each display subarea by the scanning driving circuit is positively correlated with the conduction distance of the data driving circuit for applying the data voltage to each display subarea.
S703: and providing the adjusted scanning voltage for at least one row of pixel units in each display subarea in sequence through the scanning driving circuit.
Accordingly, when the attenuation of the data voltage applied to the display section by the data driving circuit increases due to the increase of the conduction distance, the attenuation of the data voltage can be effectively compensated by increasing the scan voltage.
In some embodiments, the display driving method includes: and according to the content to be displayed, providing data voltage for the pixel units of the corresponding column through the data driving circuit.
In some embodiments, the adjusting the scan voltage applied to at least one row of pixel cells in each display partition according to the conducting distance of the data driving circuit applying the data voltage to each display partition includes:
determining a target scanning voltage required to be applied to each display subarea according to the corresponding relation between the preset data voltage conduction distance and the scanning voltage and the conduction distance applied to each display subarea by the current data driving circuit;
and controlling the scanning driving circuit to adjust the scanning voltage applied to the pixel unit in each display subarea to the corresponding target scanning voltage.
In some embodiments, the corresponding relationship between a plurality of data voltage conducting distance intervals and the scan voltage is defined in the corresponding relationship between the preset data voltage conducting distance and the scan voltage, and the determining of the target scan voltage currently required to be applied to each display partition according to the corresponding relationship between the preset data voltage conducting distance and the scan voltage and the conducting distance currently applied to each display partition by the data driving circuit further includes:
determining a data voltage conduction distance interval in which a conduction distance applied to each display subarea by a data driving circuit is positioned;
and determining the target scanning voltage required to be applied by each display subarea according to the corresponding relation between the scanning voltage and a plurality of data voltage conduction distance intervals defined in the corresponding relation between the preset data voltage conduction distance and the scanning voltage.
In some embodiments, the display driving method further includes: a conduction distance applied by the data driving circuit to each display partition is determined.
Wherein the determining the conduction distance applied to each display partition by the data driving circuit may comprise: and determining the conduction distance applied to each display subarea by the data driving circuit according to preset length data of a data line connected between each display subarea and the data driving circuit.
The data driving circuit comprises a plurality of data driving interfaces, each data line is connected with a corresponding data driving interface and sequentially extends through at least one row of pixel units in each display partition of a corresponding column to be sequentially connected with at least one row of pixel units in each display partition, and the method further comprises the following steps: and obtaining preset length data of the data line connected between each display subarea and the data driving circuit through the length between the connecting point of at least one pixel unit in each display subarea and the data line and the corresponding data driving interface.
In some embodiments, the deriving the preset length data of the data lines connected between each display partition and the data driving circuit by the length between the connection point of at least one pixel unit in each display partition connected to the data lines and the corresponding data driving interface includes:
when a certain display partition comprises at least two rows of pixel units, determining the length of a data line connected between the data driving circuit and the display partition as follows: and the length of each row of pixel units in the display subarea is equal to the length of the corresponding data driving interface in the data driving circuit, and the length of each row of pixel units in the display subarea is equal to the length of the corresponding data driving interface in the data driving circuit.
In other embodiments, the deriving the preset length data of the data line connected between each display partition and the data driving circuit according to the length between the connection point of at least one pixel unit in each display partition connected to the data line and the corresponding data driving interface includes:
when a certain display partition comprises at least two rows of pixel units, determining the length of a data line connected between the data driving circuit and the display partition as follows: and the length between the connecting point of any row of pixel units in the display subarea connected to the data line and the corresponding data driving interface in the data driving circuit.
And the preset corresponding relation between the data voltage conduction distance and the scanning voltage is a pre-stored corresponding relation table.
The display driving method can be applied to the display device 100. The display driving method includes steps corresponding to the functional steps performed by the display device 100, and the related descriptions may be referred to each other.
Therefore, in the display device 100 and the display driving method of the present application, the scan voltage applied to each display partition is proportional to the conduction distance of the data voltage applied to the corresponding display partition by the data driving circuit. When the data driving circuit applies the data voltage to the display subareas with the longer conduction distance, the scanning voltage applied by the scanning driving circuit is larger, so that the switch tube in the pixel unit in the corresponding display subarea is higher in conduction degree, the resistance value of the switch tube is smaller, the divided voltage is smaller, and the voltage supplied to the light-emitting device in the pixel unit is approximately kept unchanged even if the data voltage is attenuated due to the increase of the conduction distance.
The display driving method provided herein may be implemented in hardware, firmware, or as software or computer code that may be stored in a computer readable storage medium such as a CD, ROM, RAM, floppy disk, hard disk, or magneto-optical disk, or as computer code that is originally stored on a remote recording medium or a non-transitory machine readable medium, downloaded over a network, and stored in a local recording medium, so that the method described herein may be presented using a general purpose computer or special processor, or as software stored on a recording medium in programmable or dedicated hardware such as an ASIC or FPGA. As can be appreciated in the art, a computer, processor, microprocessor, controller or programmable hardware includes memory components, e.g., RAM, ROM, flash memory, etc., which can store or receive software or computer code when accessed and executed by a computer, processor or hardware implementing the processing methods described herein. In addition, when a general-purpose computer accesses code for implementing the processing shown herein, execution of the code transforms the general-purpose computer into a special-purpose computer for performing the processing shown herein.
The computer readable storage medium may be a solid state memory, a memory card, an optical disc, etc. The computer readable storage medium stores program instructions for a computer to call and execute the display driving method shown in fig. 7.
The foregoing is a preferred embodiment of the present application and it should be noted that modifications and embellishments could be made by those skilled in the art without departing from the principle of the present application and these are considered to be within the scope of the present application.
Claims (20)
- A display device, characterized in that the display device comprises:the pixel units are arranged in an array, wherein the pixel units arranged in the array are divided into at least two display partitions, and each display partition comprises at least one row of pixel units;the data driving circuit is electrically connected with the pixel units in the rows through a plurality of data lines and used for providing data voltages for the pixel units in the corresponding rows according to the content to be displayed;the scanning driving circuit is electrically connected with the pixel units of the rows through a plurality of scanning lines respectively and used for providing scanning voltage for the pixel units of each row in sequence, wherein the scanning driving circuit adjusts the scanning voltage applied to at least one row of pixel units in each display subarea according to the conduction distance of the data driving circuit for applying the data voltage to each display subarea, and the scanning voltage applied to at least one row of pixel units in each display subarea by the scanning driving circuit is positively correlated with the conduction distance of the data driving circuit for applying the data voltage to each display subarea.
- The display device according to claim 1, wherein each data line is sequentially connected to at least one row of pixel units in the corresponding column in each display partition, and the data driving circuit applies the data voltage to each display partition by a distance corresponding to a length of the data line connected between the data driving circuit and each display partition.
- The display device according to claim 2, wherein the data driving circuit comprises a plurality of data driving interfaces, each data line is connected to a corresponding data driving interface and sequentially extends through at least one row of pixel units in each display partition of a corresponding column to be sequentially connected to at least one row of pixel units in each display partition, and the length of the data line connected between the data driving circuit and each display partition is obtained by the length between the connecting point of at least one pixel unit in each display partition to the data line and the corresponding data driving interface.
- The display device according to claim 3, wherein when a certain display section includes at least two rows of pixel units, the length of the data line connected between the data driving circuit and the display section is: and each row of pixel units in the display subarea is connected to the average value of the distance between the connecting point of the data line and the data driving interface corresponding to the data driving circuit.
- The display device according to claim 3, wherein when a certain display section includes at least two rows of pixel units, the length of the data line connected between the data driving circuit and the display section is: and the distance between a connecting point of any row of pixel units in the display subarea, which is connected to the data line, and a data driving interface corresponding to the data driving circuit.
- The display device according to any one of claims 2 to 5, further comprising an adjustment controller coupled to the scan driving circuit, wherein the adjustment controller is configured to determine a target scan voltage required to be applied to each display partition according to a preset corresponding relationship between a data voltage conduction distance and a scan voltage and a conduction distance applied to each display partition by the current data driving circuit, and output a corresponding control signal to the scan driving circuit, so that the scan driving circuit adjusts the scan voltage applied to the pixel unit in each display partition to the corresponding target scan voltage.
- The display device according to claim 6, wherein the preset data voltage conducting distance-to-scan voltage correspondence relationship defines a correspondence relationship between a plurality of data voltage conducting distance intervals and a scan voltage, and the adjustment controller determines a data voltage conducting distance interval in which the conducting distance applied to each display region by the data driving circuit is located, and then determines the target scan voltage to be applied to each display region according to the data voltage conducting distance intervals and the scan voltage correspondence relationship defined in the preset data voltage conducting distance-to-scan voltage correspondence relationship.
- The display device according to claim 6, wherein the display device further comprises a memory, length data of the data lines connected between each display partition and the data driving circuit is stored in the memory, wherein the length data of the data lines connected between each display partition and the data driving circuit is obtained according to a pre-measurement, the adjustment controller determines the length data of the data lines connected between each display partition and the data driving circuit as a conduction distance applied to each display partition by the data driving circuit, and determines a target scan voltage required to be applied to each display partition according to a preset correspondence relationship between a data voltage conduction distance and a scan voltage and a conduction distance applied to each display partition by the current data driving circuit.
- The display device as claimed in claim 8, wherein the predetermined correspondence relationship between the data voltage conducting distance and the scan voltage is a correspondence relationship table stored in the memory.
- The display device according to claim 8, wherein the display device further comprises a shift controller, the shift controller is located between the adjustment controller and the scan driving circuit, and the control signal output by the adjustment controller is converted by the shift controller and then output to the scan driving circuit.
- A display driving method is applied to a display device, and is characterized in that the display device comprises a data driving circuit, a scanning driving circuit and a plurality of pixel units which are arranged in an array, wherein the pixel units which are arranged in the array are divided into at least two display partitions, each display partition comprises at least one row of pixel units, and the display driving method comprises the following steps:adjusting a scanning voltage applied to at least one row of pixel units in each display subarea according to a conduction distance of a data driving circuit for applying a data voltage to each display subarea, wherein the scanning voltage applied to at least one row of pixel units in each display subarea by the scanning driving circuit is positively correlated with the conduction distance of the data driving circuit for applying the data voltage to each display subarea; andand sequentially providing the adjusted scanning voltage for at least one pixel unit in each display subarea through the scanning driving circuit.
- The display driving method according to claim 11, further comprising:and according to the content to be displayed, providing data voltage for the pixel units of the corresponding column through the data driving circuit.
- The method of claim 11, wherein adjusting the scan voltage applied to at least one row of pixel cells in each display partition according to the conduction distance of the data driving circuit applying the data voltage to each display partition comprises:determining a target scanning voltage required to be applied to each display subarea according to the corresponding relation between the preset data voltage conduction distance and the scanning voltage and the conduction distance applied to each display subarea by the current data driving circuit;and controlling the scanning driving circuit to adjust the scanning voltage applied to the pixel unit in each display subarea to the corresponding target scanning voltage.
- The method as claimed in claim 13, wherein the step of determining the target scan voltage to be applied to each display region according to the preset data voltage conducting distance and scan voltage corresponding relationship and the conducting distance applied to each display region by the current data driving circuit comprises:determining a data voltage conduction distance interval in which a conduction distance applied to each display subarea by a data driving circuit is positioned;and determining the target scanning voltage required to be applied by each display subarea according to the corresponding relation between the scanning voltage and a plurality of data voltage conducting distance intervals defined in the corresponding relation between the preset data voltage conducting distance and the scanning voltage.
- The display driving method according to any one of claims 11 to 14, further comprising:a conduction distance applied by the data driving circuit to each display partition is determined.
- The display driving method of claim 15, wherein the determining the conduction distance applied to each display partition by the data driving circuit comprises:and determining the conduction distance applied to each display subarea by the data driving circuit according to preset length data of a data line connected between each display subarea and the data driving circuit.
- The display driving method of claim 16, wherein the data driving circuit comprises a plurality of data driving interfaces, each data line is connected to a corresponding data driving interface and sequentially extends through at least one row of pixel cells in each display partition of a corresponding column to be sequentially connected to at least one row of pixel cells in each display partition, the method further comprising:and obtaining preset length data of the data line connected between each display subarea and the data driving circuit through the length between the connecting point of at least one pixel unit in each display subarea and the data line and the corresponding data driving interface.
- The method according to claim 17, wherein the deriving the preset length data of the data line connected between each display partition and the data driving circuit according to the length between the connection point of at least one pixel unit in each display partition connected to the data line and the corresponding data driving interface comprises:when a certain display partition comprises at least two rows of pixel units, determining the length of a data line connected between the data driving circuit and the display partition as follows: and the length of each row of pixel units in the display subarea is the average value between the connecting point of the data line and the data driving interface corresponding to the data driving circuit.
- The method according to claim 17, wherein the deriving the preset length data of the data line connected between each display partition and the data driving circuit according to the length between the connection point of at least one pixel unit in each display partition connected to the data line and the corresponding data driving interface comprises:when a certain display partition comprises at least two rows of pixel units, determining the length of a data line connected between the data driving circuit and the display partition as follows: and the length between the connecting point of any row of pixel units in the display subarea connected to the data line and the data driving interface corresponding to the data driving circuit.
- The display driving method according to claim 13, wherein the predetermined correspondence between the data voltage conduction distance and the scan voltage is a pre-stored correspondence table.
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| PCT/CN2019/093239 WO2020258147A1 (en) | 2019-06-27 | 2019-06-27 | Display device and display driving method |
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