CN113066436A - Display panel, control method thereof and display device - Google Patents
Display panel, control method thereof and display device Download PDFInfo
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- CN113066436A CN113066436A CN202110326210.XA CN202110326210A CN113066436A CN 113066436 A CN113066436 A CN 113066436A CN 202110326210 A CN202110326210 A CN 202110326210A CN 113066436 A CN113066436 A CN 113066436A
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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
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- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal (AREA)
Abstract
The invention provides a display panel, a control method thereof and a display device, wherein the display panel comprises a plurality of pixel units which are arranged in an array mode, and each pixel unit comprises: the black insertion switch comprises a first input end and a first output end, the first input end is connected with the black insertion electrode, and the first output end is connected with the pixel electrode; when the pixel unit is in a black insertion state, the black insertion switch is turned on, and the black insertion electrode is used for loading a black insertion voltage to enable the pixel electrode and the common electrode to drive the pixel unit to present a black picture; the scheme can reduce the requirement on high output frequency of the driving circuit so as to reduce the design cost of the driving circuit.
Description
Technical Field
The invention relates to the technical field of display, in particular to manufacturing of a display device, and specifically relates to a display panel, a control method of the display panel and a display device.
Background
The black insertion technology can effectively slow down the phenomenon of the trailing of the liquid crystal display picture by inserting the black picture frame between every two or more frames of display pictures.
However, in the conventional pixel unit, the black insertion signal needs to be transmitted between two adjacent data voltages, and in order to avoid the reduction of the effective display frame rate, the data voltage and the black insertion signal need to be transmitted to the switch which originally drives only the pixel to display in a time-sharing manner within the time period corresponding to the effective display frame rate, so as to ensure that the sum of the data voltage for transmission and the black insertion signal is still the time period corresponding to the effective display frame rate; however, this requires a higher actual signal output frequency of the driving circuit for transmitting the data voltage and the black insertion signal, which greatly increases the design cost of the driving circuit.
Therefore, it is necessary to provide a display panel, a control method thereof and a display device to reduce the requirement for high output frequency of the driving circuit and to reduce the design cost of the driving circuit.
Disclosure of Invention
The invention aims to provide a display panel, a control method thereof and a display device, wherein a black insertion electrode and a black insertion switch are arranged, a first input end of the black insertion switch is connected with the black insertion electrode, a first output end of the black insertion switch is connected with a pixel electrode, when a pixel unit is in a black insertion state, the black insertion switch is turned on, and the black insertion electrode is used for loading a black insertion voltage so as to enable the pixel electrode and a common electrode to drive the pixel unit to present a black picture; the problem that the design cost of a driving circuit is high due to the fact that data voltage and black insertion signals need to be transmitted to a switch which originally only drives pixels to display in a time-sharing mode within a time period corresponding to an effective display frame rate in the prior art is solved.
The invention provides a display panel, which comprises a plurality of pixel units arranged in an array, wherein each pixel unit comprises:
a pixel electrode;
a common electrode;
inserting a black electrode; and
the black insertion switch comprises a first input end and a first output end, the first input end is connected with the black insertion electrode, and the first output end is connected with the pixel electrode;
when the black insertion switch is turned on, the pixel unit is in a black insertion state, and the potentials of the common electrode and the pixel electrode are the same, so that the pixel unit is driven to present a black picture;
when the black insertion switch is turned on, the black insertion electrode loaded with the black insertion voltage is electrically connected with the pixel electrode through the black insertion switch, so that the pixel electrode and the common electrode drive the pixel unit to present a black picture, and the pixel unit is in a black insertion state.
In an embodiment, the display device further includes a plurality of data lines arranged at intervals, and each of the pixel units further includes:
the display switch comprises a second input end and a second output end, the second input end is connected with the corresponding data line, and the second output end is connected with the pixel electrode;
when the display switch is turned on, the common electrode is loaded with a common voltage, and the pixel electrode is loaded with a data voltage, so that the pixel unit is in a display state.
In an embodiment, when the pixel unit is in the black insertion state, the common electrode loads the common voltage, and a difference between the black insertion voltage and the common voltage is smaller than a preset value.
In one embodiment, one or more additional rows of the pixel cells are in the black inserted state when one row of the pixel cells is in the display state.
In an embodiment, the display device further includes a gate driving circuit electrically connected to the control terminal of the black insertion switch and the control terminal of the display switch in each pixel unit.
In an embodiment, the display device further includes a plurality of display gate lines and a plurality of black insertion gate lines arranged at intervals, each display gate line is electrically connected to the control ends of the plurality of display switches in the pixel unit of the corresponding row to control the turn-on condition of the corresponding plurality of display switches, and each black insertion gate line is electrically connected to the control ends of the plurality of black insertion switches in the pixel unit of the corresponding row to control the turn-on condition of the plurality of black insertion switches.
In an embodiment, the display device further includes a plurality of gate lines arranged at intervals, each gate line is electrically connected to the control terminals of the plurality of display switches in the pixel unit of the corresponding row to control the turn-on conditions of the plurality of display switches, each gate line is electrically connected to the control terminals of the plurality of black insertion switches in the pixel unit of the corresponding row through an inverter to control the turn-on conditions of the plurality of black insertion switches, and the control terminals of the plurality of display switches and the control terminals of the plurality of black insertion switches in the same pixel unit are electrically connected to the same gate line.
In one embodiment, the display switch and the black insertion switch are thin film transistors.
The invention provides a control method of a display panel, which is applied to the display panel, and comprises the following steps:
and controlling the black insertion switch to be turned on, and loading a black insertion voltage to the black insertion electrode, so that the black insertion electrode loaded with the black insertion voltage is electrically connected with the pixel electrode through the black insertion switch, and the pixel electrode and the common electrode drive the pixel unit to present the black picture, so that the pixel unit is in a black insertion state.
In an embodiment, the display panel further includes a plurality of data lines arranged at intervals, each of the pixel units further includes a display switch, the display switch includes a second input end and a second output end, the second input end is connected to the corresponding data line, the second output end is connected to the pixel electrode, and the control method of the display panel further includes:
and controlling the display switch to be started, and respectively loading a public voltage and a data voltage to the public electrode and the pixel electrode.
In an embodiment, the control method of the display panel further includes:
and controlling one row of the display switches to be turned on to enable the pixel units of the corresponding row to be in the display state, and simultaneously controlling the other row or the plurality of rows of the black insertion switches to be turned on to enable the pixel units of the corresponding row or the plurality of rows to be in the black insertion state.
In an embodiment, the display panel further includes a plurality of display gate lines and a plurality of black insertion gate lines arranged at intervals, each of the display gate lines is electrically connected to the control ends of the plurality of display switches in the pixel units in the corresponding row, and each of the black insertion gate lines is electrically connected to the control ends of the plurality of black insertion switches in the pixel units in the corresponding row, and the control method of the display panel further includes:
and loading a corresponding display starting signal to one display gate line to control the display switches of the corresponding row to be started, and loading a corresponding black insertion starting signal to the other one or more black insertion gate lines to control the black insertion switches of the corresponding row to be started.
The present invention provides a display device comprising a display panel as described in any of the above.
The invention provides a display panel, a control method thereof and a display device, wherein the display panel comprises a plurality of pixel units which are arranged in an array, each pixel unit comprises a pixel electrode and a common electrode, a black insertion electrode and a black insertion switch are arranged in each pixel unit, a first input end of the black insertion switch is connected with the black insertion electrode, and a first output end of the black insertion switch is connected with the pixel electrode; when the pixel unit is in a black insertion state, the black insertion switch is set to be turned on, and the black insertion electrode is used for loading a black insertion voltage so that the pixel electrode and the common electrode drive the pixel unit to present a black picture. In the scheme, the black insertion electrode and the black insertion switch are arranged in each pixel unit, so that the black insertion state of any row of pixels can be performed in parallel with the display state of any other row or rows of pixels, namely the black insertion state of any row of pixels of the whole display panel does not occupy or compress the duration of the display state of any row of pixels, the data line can maintain the original frequency and only transmit the data voltage, the requirement of high output frequency of a corresponding driving circuit is avoided, and the design cost of the corresponding driving circuit is reduced.
Drawings
The invention is further illustrated by the following figures. It should be noted that the drawings in the following description are only for illustrating some embodiments of the invention, and that other drawings may be derived from those drawings by a person skilled in the art without inventive effort.
Fig. 1 is a schematic top view of a first display panel according to an embodiment of the invention.
Fig. 2 is a schematic top view of a second display panel according to an embodiment of the invention.
Fig. 3 is a schematic top view of a third display panel according to an embodiment of the invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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 invention.
In the description of the present invention, it is to be understood that the terms "corresponding," "row," "column," and the like indicate orientations or positional relationships based on those shown in the drawings, which are merely for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more, and unless otherwise specifically limited, "electrically connected" means that both are electrically connected, and is not limited to being directly connected or indirectly connected.
In addition, it should be noted that the drawings only provide a structure that is relatively closely related to the present invention, and some details that are not related to the present invention are omitted, so as to simplify the drawings and make the application point clear, but not to show that the device in practice is the same as the drawings and not to limit the device in practice.
The present invention provides a display panel including, but not limited to, the following embodiments.
In an embodiment, as shown in fig. 1, the display panel 100 includes a plurality of pixel units 101 arranged in an array, where each of the pixel units 101 includes: a pixel electrode 102; a common electrode 103; black insertion electrodes 104; and a black insertion switch 105, wherein the black insertion switch 105 includes a first input terminal 01 and a first output terminal 02, the first input terminal 01 is connected to the black insertion electrode 104, and the first output terminal 02 is connected to the pixel electrode 102; when the black insertion switch 105 is turned on, the pixel unit 101 is in a black insertion state, and the potentials of the common electrode 103 and the pixel electrode 102 are the same, so that the pixel unit 101 is driven to present a black picture; when the black insertion switch 105 is turned on, the black insertion electrode 104 loaded with a black insertion voltage is electrically connected to the pixel electrode 102 through the black insertion switch 105, so that the pixel electrode 102 and the common electrode 103 drive the pixel unit 101 to present a black picture, so that the pixel unit 101 is in a black insertion state.
The display panel 100 may be a liquid crystal display panel, an OLED display panel, or a Mini LED display panel. For example, when the display panel 100 is a liquid crystal display panel, a plurality of liquid crystal molecules are disposed between each pixel electrode 102 and the corresponding common electrode 103, and when a voltage difference exists between the pixel electrode 102 and the corresponding common electrode 103, a corresponding electric field is generated, which drives the plurality of liquid crystal molecules to deflect, so that the corresponding pixel unit 101 presents a corresponding picture. For another example, when the display panel 100 is an OLED display panel, the pixel electrode 102 may be an anode, the common electrode 103 may be a cathode, a corresponding light emitting portion is disposed between each anode and the corresponding cathode, a corresponding electric field is generated when the anode and the corresponding cathode have a voltage difference, holes generated by the anode and electrons generated by the cathode move under the action of the electric field and migrate to the light emitting layer, and when the two meet at the light emitting layer, energy excitons are generated to excite light emitting molecules to finally generate visible light, so that the corresponding pixel unit 101 presents a corresponding picture. For another example, when the display panel 100 is a Mini LED display panel, reference may be made to the above description regarding the OLED display panel, except that the constituent material of the light emitting layer in the Mini LED display panel is an inorganic material, such as a metal, rather than an organic material, as in the OLED display panel.
Specifically, the display panel 100 is described as an example of a liquid crystal display panel. Generally, the pixel electrode 102 is applied with a data voltage, the common electrode 103 is applied with a common voltage, the data voltage may be a signal related to a displayed image, and the common voltage may be a constant voltage signal, such that the corresponding plurality of liquid crystal molecules between the pixel electrode 102 and the corresponding common electrode 103 are deflected to make the corresponding pixel unit 101 present a corresponding picture. It can be understood that, when the pixel unit 101 is in the black insertion state, the black insertion switch 105 is turned on, and the black insertion voltage applied to the black insertion electrode 104 can be transmitted to the pixel electrode 102 through the black insertion switch 105, that is, when the pixel electrode 102 has the black insertion voltage and the common electrode 103 has the common voltage, and an electric field generated by a difference between the black insertion voltage and the common voltage can drive the corresponding plurality of liquid crystal molecules to be in the corresponding deflection state, so as to further make the corresponding pixel unit 101 present a black picture.
In an embodiment, as shown in fig. 2, the display panel 100 further includes a plurality of data lines 03 arranged at intervals, and each of the pixel units 101 further includes: a display switch 106, where the display switch 106 includes a second input end 04 and a second output end 05, the second input end 04 is connected to the corresponding data line 03, and the second output end 05 is connected to the pixel electrode 102; when the display switch 106 is turned on, the common electrode 103 is loaded with a common voltage, and the pixel electrode 102 is loaded with a data voltage, so that the pixel unit 101 is in a display state.
As shown in fig. 2, the plurality of data lines 03 may correspond to a plurality of columns of the pixel units 101 one to one, one data line 03 may be disposed between two adjacent columns of the pixel units 101, and the data line 03 may be electrically connected to one corresponding column of the pixel units 101. Specifically, the second input terminals 04 of each column are loaded by the corresponding data lines 03 to be corresponding data voltages, and each data voltage may have a corresponding voltage value in different time periods; further, a plurality of rows of the display switches 106 may be sequentially turned on at different periods of time, such that the plurality of pixel electrodes 102 in each row are loaded with corresponding data voltage values through the corresponding plurality of display switches 106 at corresponding periods of time, respectively; further, taking the display panel 100 as an example of a liquid crystal display panel, as can be seen from the above analysis, a difference between the data voltage value of the pixel electrode 102 and the common voltage value of the common electrode 103 generates a corresponding electric field, so that a plurality of liquid crystal molecules between the pixel electrode 102 and the common electrode 103 are deflected to make the corresponding pixel unit 101 display a corresponding picture, that is, each of the pixel electrode 102 and the common electrode 103 drives the corresponding pixel unit 101 to display a picture.
It should be noted that, in order to achieve a high-quality display state and a black insertion state, the periods in which the plurality of pixel units 101 in each row are in the display state and the periods in the black insertion state should not intersect, that is, the plurality of black insertion switches 105 and the plurality of display switches 106 in the same row cannot be simultaneously in the on state.
It can be understood from the above analysis that the principle of black insertion of the display panel 100 is as follows: the black insertion switch 105 is turned on, the black insertion voltage loaded on the black insertion electrode 104 is transmitted to the pixel electrode 102 through the black insertion switch 105, an electric field generated by a difference value between the black insertion voltage loaded on the pixel electrode 102 and the common voltage loaded on the common electrode 103 can drive a plurality of corresponding liquid crystal molecules to be in a corresponding deflection state, and further the corresponding pixel unit 101 presents a black picture, that is, the black insertion is realized by arranging the black insertion switch 105 and the black insertion electrode 104 in the present invention.
In summary, in the present invention, black insertion does not require that each data line 03 serially transmit a black insertion signal to a corresponding row of pixel units 101 by compressing the time for transmitting the data voltage, so that the corresponding pixel units 101 present the black frame; instead, one row of the pixel units 101 is set to be in the display state at any time interval, and in parallel, at least one other row of the pixel units 101 is set to be in the black insertion state, so that each data line 03 can transmit the data voltage to only one corresponding column of the pixel units 101 in each cycle to realize that the corresponding pixel unit 101 presents the display picture, and a reserved time is not required to transmit the black insertion signal to the corresponding column of the pixel units 101 in each cycle, so that the refresh rate of the data voltage does not need to be increased, and the requirement for high output frequency of a driving circuit can be reduced.
In an embodiment, when the pixel unit 101 is in the black insertion state, the common electrode 103 loads the common voltage, and a difference between the black insertion voltage and the common voltage is smaller than a preset value. It should be noted that the preset value is related to the properties of the corresponding liquid crystal molecules, and the preset value may be selected to limit the difference between the black insertion voltage and the common voltage according to the properties of the corresponding liquid crystal molecules, so as to realize that the corresponding pixel unit 101 presents a black frame. For example, when the corresponding liquid crystal molecules have a property that the absolute value of the deflection angle and the difference are in positive correlation, and the gray level value of the picture displayed by the corresponding pixel unit 101 and the absolute value of the deflection angle are in positive correlation, the difference between the black insertion voltage and the common voltage may be 0.
In an embodiment, the display switch 106 and the black insertion switch 105 may be thin film transistors. Specifically, the control end of the display switch 106 may be a gate of the corresponding thin film transistor, and the second input end 04 and the second output end 05 of the display switch 106 may be a source and a drain of the corresponding thin film transistor, respectively; similarly, the control end of the black insertion switch 105 may be a gate of the corresponding thin film transistor, and the first input end 01 and the first output end 02 of the black insertion switch 105 may be a source and a drain of the corresponding thin film transistor, respectively.
In one embodiment, as shown in fig. 2, when one row of the pixel units 101 is in the display state, another row or multiple rows of the pixel units 101 are in the black insertion state, and further, a period during which any row of the pixel units 101 is in the display state includes a period during which another row or multiple rows of the pixel units 101 are in the black insertion state.
It should be noted that the display state can be understood as a state in which the display switch 106 in the corresponding pixel unit 101 is turned on, and further, each row of the pixel units 101 can also have a sustain state, where the sustain state is located between two adjacent display states and the black insertion state. Specifically, as shown in fig. 1-2, each of the pixel units 101 may further include a storage capacitor 108, two ends of the storage capacitor 108 are electrically connected to the corresponding pixel electrode 102 and the corresponding common electrode 103, respectively, when the display switch 106 and the black insertion switch 105 are both in the off state, and the storage capacitor 108 may maintain the potential of the corresponding pixel electrode 102 at the previous potential in the last display state, so that the corresponding pixel unit 101 still presents the display image.
Specifically, the period in which any row of the pixel units 101 is in the display state includes another row or multiple rows of the periods in which the pixel units 101 are in the black insertion state, which may include, but is not limited to, the following two embodiments: in the first aspect, the period during which any one row of the pixel units 101 is in the display state may include a first period during which another row of the pixel units 101 is in the black insertion state, and a second period during which a different row of the pixel units 101 from the above two rows is in the black insertion state; in the second aspect, in the period in which any one row of the pixel units 101 is in the display state, another plurality of rows of the pixel units 101 are in the black insertion state. It is understood that, after the rows of the pixel units 101 in the display panel 100 sequentially experience the corresponding plurality of display states, the respective display frames are finally presented at the same time at the last time of one frame of the display panel 100 to form a complete frame of the display frame, and the corresponding time periods are sequentially selected in parallel so that the rows of the pixel units 101 in the display panel 100 respectively experience the corresponding plurality of display states in a time-sharing or partially time-sharing manner.
In an embodiment, the display panel 100 may include n rows of the pixel units 101, and the time period during which the corresponding plurality of the display switches 106 in the ith row of the pixel units 101 are turned on includes the time period during which the corresponding plurality of the black insertion switches 105 in the (i + j) th row or the (i + k) th row to the (i + k + h) th row of the pixel units 101 are turned on, wherein the i, the (i + j), the (i + k), and the (i + k + h) are not less than 1 and not more than n, and the j and the k are not less than 2, that is, at least one row of the pixel units 101 is spaced between two rows of the pixel units 101 in the display state and the black insertion state at the same time, and is transmitted to the pixel units 101 in the next rows according to the above rule, which can be understood that the first time when the display switches 106 in the pixel units 101 in each row are turned on and the first time when the black insertion switches 105 are turned on can be avoided Too far in time causes the display panel 100 to render a frame of the complete display darker.
In one embodiment, as shown in fig. 2, the period of time that any row of the pixel units 101 is in the display state includes a period of time that another row of the pixel units 101 is in the black insertion state.
Specifically, as shown in fig. 2, assuming that the display panel 100 includes n rows of the pixel units 101, when the display panel 100 appears as the last time of the complete display screen of the previous frame, the display switch 105 of the 1 st row is in an on state, the black insertion switch 105 of the 3 rd row is also in an on state, that is, in the time period in which the pixel unit 101 of the 1 st row refreshes the black insertion screen into the display screen of the present frame, the pixel unit 101 of the 3 rd row refreshes the display screen of the previous frame into the black insertion screen … …, and so on, the display switch 105 of the (n-2) th row is in an on state, the black insertion switch 105 of the nth row is also in an on state, that is, in the time period in which the pixel unit 101 of the (n-2) th row refreshes the black insertion screen into the display screen of the present frame, the pixel unit 101 of the nth row refreshes the display screen of the previous frame into the black insertion screen, until the display switch 105 in the nth row is turned on, the black insertion switch 105 in the 2 nd row is also turned on, that is, the pixel unit 101 in the nth row refreshes the black insertion picture into the display picture of the current frame, and the pixel unit 101 in the 2 nd row refreshes the display picture of the current frame into the black insertion picture.
It is to be understood that, assuming that the period during which the display switches 105 in the pixel units 101 in each row are turned on is T, black insertion display is performed according to the rule that "the first time of the period during which the pixel units 101 in the p-th row are in the display state is the same as the first time of the period during which the pixel units 101 in the (p + q) th row are in the black insertion state, and 1 ≦ p ≦ n-q)", that is, the difference between the first time when the display switches 106 in the pixel units 101 in each row are turned on and the first time when the black insertion switches 105 are turned on is T (n-q). According to the above analysis, the larger q is, the smaller T (n-q) is, that is, the smear of the complete display frame presented by the display panel 100 is severe, whereas the complete display frame presented by the display panel 100 is dark, so that the q may be set appropriately according to the requirement and the actual situation, so as to obtain the appropriate difference between the first time when the display switches 106 in the pixel units 101 of each row are turned on and the first time when the black insertion switches 105 are turned on.
In an embodiment, as shown in fig. 3, the display panel 100 further includes a gate driving circuit, where the gate driving circuit is electrically connected to the control terminal of the black insertion switch 105 and the control terminal of the display switch 106 in each pixel unit 101, and is used to enable the black insertion switch 105 to be turned on when the pixel unit 101 is in the black insertion state, and enable the display switch 106 to be turned on when the pixel unit 101 is in the display state. Specifically, the gate driving circuit is electrically connected to the control terminal of the black insertion switch 105 and the control terminal of the display switch 106 in each pixel unit 101.
The gate driving circuit may be a single-side gate driving circuit or a double-side gate driving circuit, and fig. 3 illustrates the double-side gate driving circuit as an example. Specifically, the bilateral gate driving circuit includes a first gate driving circuit 061 and a second gate driving circuit 062 respectively located near a left region and a right region of the display panel 100, the first gate driving circuit 061 and the second gate driving circuit 062 may be in a mirror relationship, the first gate driving circuit 061 and the second gate driving circuit 062 each include a plurality of cascaded gate driving units 063, the plurality of gate driving units 063 respectively correspond to the plurality of rows of the pixel units 101 one to one, and an output end of each gate driving unit 063 is electrically connected to the plurality of black insertion switches 105 and the plurality of display switches 106 in the corresponding row of the pixel units 101.
In an embodiment, as shown in fig. 3, the display panel 100 further includes a plurality of display gate lines 07 and a plurality of black insertion gate lines 08 arranged at intervals, each of the display gate lines 07 is electrically connected to the control terminals of the plurality of display switches 106 in the corresponding row of the pixel units 101 to control the turn-on of the corresponding plurality of display switches 106, and each of the black insertion gate lines 08 is electrically connected to the control terminals of the plurality of black insertion switches 105 in the corresponding row of the pixel units 101 to control the turn-on of the plurality of black insertion switches 105.
Specifically, one display gate line 07 and one black insertion gate line 08 are arranged between two adjacent rows of the pixel units 101, and since a plurality of the display switches 106 and a plurality of the black insertion switches 105 in each row of the pixel units 101 cannot be simultaneously turned on, that is, one display gate line 07 and one black insertion gate line 08 may be configured in each row of the pixel units 101, for example, one display gate line 07 and one black insertion gate line 08 between two adjacent rows of the pixel units 101 may be electrically connected to one of two adjacent rows of the pixel units 101.
Further, since a plurality of the display switches 106 and a plurality of the black insertion switches 105 in each row of the pixel units 101 cannot be simultaneously turned on, that is, the on states of a plurality of the display switches 106 in each row of the pixel units 101 correspond to the off states of a plurality of the black insertion switches 105, and the off-states of the plurality of display switches 106 in each row of the pixel units 101 correspond to the on-states of the plurality of black insertion switches 105, it can be understood that the signal transmitted in each of the display gate lines 07 is opposite to the signal transmitted in the corresponding one of the black insertion gate lines 08, and thus, at the same time, the signals applied to the control terminals of the plurality of display switches 106 in the pixel unit 101 of the same row are opposite to the signals applied to the control terminals of the plurality of black insertion switches 105 in the pixel unit 101 of the row.
In an embodiment, the display panel 100 may also include a plurality of gate lines arranged at intervals, each gate line is electrically connected to the control terminals of the plurality of display switches 106 in the pixel units 101 of the corresponding row to control the turn-on conditions of the plurality of display switches 106, each gate line is electrically connected to the control terminals of the plurality of black insertion switches 105 in the pixel units 101 of the corresponding row through an inverter, the control terminals of the plurality of display switches 106 in the same pixel unit 101 are electrically connected to the control terminals of the plurality of black insertion switches 105 to control the turn-on conditions of the plurality of black insertion switches 105, and the control terminals of the plurality of display switches and the control terminals of the plurality of black insertion switches in the same pixel unit are electrically connected to the same gate line. For example, the display panel 100 may only include a plurality of the display gate lines 07 as the plurality of gate lines, the control terminals of the plurality of the display switches 106 in each row of the pixel units 101 are electrically connected to the corresponding display gate line 07, and the control terminals of the plurality of the black insertion switches 105 in the row of the pixel units 101 are electrically connected to the corresponding display gate line 07 through an inverter.
In an embodiment, the plurality of common electrodes 103 are disposed in the same layer, and the plurality of common electrodes 103 and the plurality of pixel electrodes 102 are disposed opposite to each other or disposed in the same layer. Specifically, the plurality of common electrodes 103 may be disposed in the same layer to form a continuous common electrode layer, the plurality of black insertion electrodes 104 may be disposed in the same layer to form a continuous black insertion electrode layer, and the black insertion electrode layer may also be disposed opposite to the plurality of pixel electrodes 102 or disposed in the same layer.
Specifically, when the display panel 100 is a liquid crystal display panel, the display panel 100 further includes a liquid crystal layer, and whether the common electrode layer and the plurality of pixel electrodes 102 are disposed oppositely or disposed on the same layer, the liquid crystal layer is disposed on one side of the plurality of pixel units 101, the liquid crystal layer includes a plurality of liquid crystal molecules, and an electric field between each of the pixel electrodes 102 and the common electrode layer drives the corresponding plurality of liquid crystal molecules to deflect, so that the pixel units 101 present the black frame or the display frame. When the display panel 100 is an OLED display panel, the display panel 100 further includes a light emitting layer, the common electrode layer may be disposed opposite to the plurality of pixel electrodes 102, the light emitting layer is disposed between the common electrode layer and the plurality of pixel electrodes 102, the light emitting layer includes a plurality of light emitting portions, the plurality of light emitting portions and the plurality of pixel units 101 are disposed in a one-to-one correspondence manner, and the current between the pixel electrodes 102 and the common electrode layer drives the corresponding light emitting portions to emit light, so that the pixel units 101 display the black frame or the display frame.
The present invention also provides a control method of a display panel, which is applied to the display panel 100 as described in any one of the above, the control method of the display panel including: controlling the black insertion switch 105 to be turned on, and applying a black insertion voltage to the black insertion electrode 104, so that the black insertion electrode 104 applied with the black insertion voltage is electrically connected to the pixel electrode 102 through the black insertion switch 105, and the pixel electrode 102 and the common electrode 103 drive the pixel unit 101 to present the black picture, so that the pixel unit 101 is in a black insertion state.
In an embodiment, the display panel 100 further includes a plurality of data lines 03 arranged at intervals, each of the pixel units 101 further includes a display switch 106, the display switch 106 includes a second input end 04 and a second output end 05, the second input end 04 is connected to the corresponding data line 03, the second output end 05 is connected to the pixel electrode 102, and the control method of the display panel further includes: and controlling the display switch 106 to be turned on, and respectively applying a common voltage and a data voltage to the common electrode 103 and the pixel electrode 102.
In an embodiment, the control method of the display panel further includes: one row of the display switches 106 is controlled to be turned on to make the pixel units 101 in the corresponding row in the display state, and the other row or rows of the black insertion switches 105 are controlled to be turned on to make the pixel units 101 in the corresponding row or rows in the black insertion state.
In an embodiment, the display panel further includes a plurality of display gate lines 07 and a plurality of black insertion gate lines 08 arranged at intervals, each of the display gate lines 07 is electrically connected to the control terminals of the plurality of display switches 106 in the pixel units 101 in a corresponding row, and each of the black insertion gate lines 08 is electrically connected to the control terminals of the plurality of black insertion switches 105 in the pixel units 101 in a corresponding row, and the control method of the display panel further includes: a corresponding display start signal is applied to one of the display gate lines 07 to control the display switches 106 in the corresponding row to be turned on, and a corresponding black insertion start signal is applied to another one or more black insertion gate lines 08 to control the black insertion switches 105 in the corresponding row to be turned on. Specifically, as can be seen from the above analysis, for the display state, the gate driving circuit may be controlled to input the corresponding display-on signal to the display gate line 07 to turn on the display switch 106, and control the data line 03 to apply the data voltage to the corresponding second input terminal 04 so that the data voltage is transmitted to the pixel electrode 102 through the display switch 106, so that the pixel unit 101 presents the display screen.
The invention also provides a display device comprising a display panel as described in any of the above.
The invention provides a display panel, a control method thereof and a display device, wherein the display panel comprises a plurality of pixel units which are arranged in an array, each pixel unit comprises a pixel electrode and a common electrode, a black insertion electrode and a black insertion switch are arranged in each pixel unit, a first input end of the black insertion switch is connected with the black insertion electrode, and a first output end of the black insertion switch is connected with the pixel electrode; when the pixel unit is in a black insertion state, the black insertion switch is set to be turned on, and the black insertion electrode is used for loading a black insertion voltage so that the pixel electrode and the common electrode drive the pixel unit to present a black picture. In the scheme, the black insertion electrode and the black insertion switch are arranged in each pixel unit, so that the black insertion state of any row of pixels can be performed in parallel with the display state of any other row or rows of pixels, namely the black insertion state of any row of pixels of the whole display panel does not occupy or compress the duration of the display state of any row of pixels, the data line can maintain the original frequency and only transmit the data voltage, the requirement of high output frequency of a corresponding driving circuit is avoided, and the design cost of the corresponding driving circuit is reduced.
The display panel, the structure of the display device, and the control method of the display panel provided in the embodiments of the present invention are described in detail above, and a specific example is applied in the present disclosure to explain the principle and the implementation of the present invention, and the description of the above embodiments is only used to help understanding the technical scheme and the core idea of the present invention; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (13)
1. A display panel, comprising a plurality of pixel units arranged in an array, each of the pixel units comprising:
a pixel electrode;
a common electrode;
inserting a black electrode; and
the black insertion switch comprises a first input end and a first output end, the first input end is connected with the black insertion electrode, and the first output end is connected with the pixel electrode;
when the black insertion switch is turned on, the pixel unit is in a black insertion state, and the common electrode and the pixel electrode have the same potential, so that the pixel unit is driven to present a black picture;
when the black insertion switch is turned on, the black insertion electrode loaded with the black insertion voltage is electrically connected with the pixel electrode through the black insertion switch, so that the pixel electrode and the common electrode drive the pixel unit to present a black picture, and the pixel unit is in a black insertion state.
2. The display panel of claim 1, further comprising a plurality of data lines arranged at intervals, each of the pixel units further comprising:
the display switch comprises a second input end and a second output end, the second input end is connected with the corresponding data line, and the second output end is connected with the pixel electrode;
when the display switch is turned on, the common electrode is loaded with a common voltage, and the pixel electrode is loaded with a data voltage, so that the pixel unit is in a display state.
3. The display panel of claim 2, wherein the common electrode is loaded with the common voltage when the pixel cell is in the black insertion state, and a difference between the black insertion voltage and the common voltage is less than a preset value.
4. The display panel of claim 2, wherein one or more additional rows of the pixel cells are in the black inserted state when one row of the pixel cells is in the display state.
5. The display panel of claim 2, further comprising a gate driving circuit electrically connected to the control terminal of the black insertion switch and the control terminal of the display switch in each pixel unit.
6. The display panel of claim 5, further comprising a plurality of display gate lines and a plurality of black insertion gate lines arranged at intervals, wherein each of the display gate lines is electrically connected to the control terminals of the plurality of display switches in the pixel units of the corresponding row to control the turn-on of the corresponding plurality of display switches, and each of the black insertion gate lines is electrically connected to the control terminals of the plurality of black insertion switches in the pixel units of the corresponding row to control the turn-on of the plurality of black insertion switches.
7. The display panel of claim 5, further comprising a plurality of gate lines arranged at intervals, wherein each gate line is electrically connected to the control terminals of the plurality of display switches in the pixel units of the corresponding row to control the turn-on of the plurality of display switches, each gate line is electrically connected to the control terminals of the plurality of black insertion switches in the pixel units of the corresponding row through an inverter to control the turn-on of the plurality of black insertion switches, and the control terminals of the plurality of display switches and the control terminals of the plurality of black insertion switches in the same pixel unit are electrically connected to the same gate line.
8. The display panel according to claim 2, wherein the display switch and the black insertion switch are thin film transistors.
9. A control method of a display panel, applied to the display panel according to any one of claims 1 to 8, the control method of the display panel comprising:
and controlling the black insertion switch to be turned on, and loading a black insertion voltage to the black insertion electrode, so that the black insertion electrode loaded with the black insertion voltage is electrically connected with the pixel electrode through the black insertion switch, and the pixel electrode and the common electrode drive the pixel unit to present the black picture, so that the pixel unit is in a black insertion state.
10. The method for controlling a display panel according to claim 9, wherein the display panel further includes a plurality of data lines arranged at intervals, each of the pixel units further includes a display switch, the display switch includes a second input terminal and a second output terminal, the second input terminal is connected to the corresponding data line, the second output terminal is connected to the pixel electrode, and the method further includes:
and controlling the display switch to be started, and respectively loading a public voltage and a data voltage to the public electrode and the pixel electrode.
11. The control method of a display panel according to claim 10, further comprising:
and controlling one row of the display switches to be turned on to enable the pixel units of the corresponding row to be in the display state, and simultaneously controlling the other row or the plurality of rows of the black insertion switches to be turned on to enable the pixel units of the corresponding row or the plurality of rows to be in the black insertion state.
12. The method of claim 11, wherein the display panel further comprises a plurality of display gate lines and a plurality of black insertion gate lines arranged at intervals, each of the display gate lines is electrically connected to the control terminals of the plurality of display switches in the corresponding row of the pixel units, and each of the black insertion gate lines is electrically connected to the control terminals of the plurality of black insertion switches in the corresponding row of the pixel units, the method further comprising:
and loading a corresponding display starting signal to one display gate line to control the display switches of the corresponding row to be started, and loading a corresponding black insertion starting signal to the other one or more black insertion gate lines to control the black insertion switches of the corresponding row to be started.
13. A display device comprising a display panel according to any one of claims 1 to 8 or a display panel controlled by a control method of a display panel according to any one of claims 9 to 12.
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