CN116486746B - Display panel and display device - Google Patents
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- CN116486746B CN116486746B CN202310485988.4A CN202310485988A CN116486746B CN 116486746 B CN116486746 B CN 116486746B CN 202310485988 A CN202310485988 A CN 202310485988A CN 116486746 B CN116486746 B CN 116486746B
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- 238000010586 diagram Methods 0.000 description 6
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
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Classifications
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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
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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
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0209—Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The application belongs to the display field, concretely relates to display panel and display device, display panel includes a plurality of high voltage power supply lines, a plurality of scanning lines that the row direction set up, a plurality of data lines that the column direction set up and correspond the pixel drive circuit that scanning line and data line cross point set up, high voltage power supply line, scanning line and data line all are connected with pixel drive circuit, high voltage power supply line includes at least one of first high voltage power supply line and second high voltage power supply line, the data line includes at least one of first data line and second data line, display panel still includes subtracting circuit, at least one of high voltage power supply line and data line passes through subtracting circuit with pixel drive circuit and is connected. The subtracting circuit can subtract the first data line signal and the second data line signal or subtract the first high-voltage power line signal and the second high-voltage power line signal, so that fluctuation caused by coupling effect is reduced or eliminated, crosstalk of a display picture can be reduced or eliminated, and the display effect of the display panel is improved.
Description
Technical Field
The application belongs to the field of display, and particularly relates to a display panel and a display device.
Background
An Organic Light-Emitting Diode (OLED) display panel does not need a backlight source, has the advantages of being flexible, thin in thickness, high in brightness, low in power consumption, fast in response, wide in color gamut and the like, and is widely used in electronic products such as televisions, mobile phones and notebooks.
The pixel driving circuit of the OLED display panel comprises a driving transistor and an organic light emitting diode, wherein the grid electrode of the driving transistor is connected with the data line, the source electrode of the driving transistor is connected with the high-voltage end of the power supply, and the drain electrode of the driving transistor is connected with the low-voltage end of the power supply through the organic light emitting diode. The voltage difference between the grid electrode and the source electrode of the driving transistor determines the starting degree of the driving transistor, and the starting degree of the driving transistor determines the current and the brightness of the organic light emitting diode. In addition, the voltage difference between the high voltage end and the low voltage end of the power supply can also affect the current and brightness of the organic light emitting diode.
At present, parasitic capacitance exists among the data line, the power line and other signal lines on the display panel, so that signals on the data line and the power line fluctuate due to coupling action, and the crosstalk phenomenon occurs when the display panel displays pictures, and the display effect of the display panel is affected.
Disclosure of Invention
The present invention provides a display panel and a display device, which can reduce or eliminate crosstalk of a display screen and improve display effect of the display panel.
In order to achieve the above object, the present application provides a display panel, including a plurality of high-voltage power lines, a plurality of scanning lines that row direction set up, a plurality of data lines that column direction set up and correspond scanning lines with pixel drive circuit that data line cross point set up, high-voltage power lines, scanning lines and data lines all with pixel drive circuit connects, high-voltage power lines include at least one of first high-voltage power lines and second high-voltage power lines, the data lines include at least one of first data lines and second data lines, the display panel still includes subtracting circuit, at least one of high-voltage power lines and data lines with pixel drive circuit passes through subtracting circuit connects, subtracting circuit is used for first high-voltage power line signal with second high-voltage power line signal difference operation, perhaps first data line signal with second data line signal difference operation.
Optionally, the subtracting circuit includes a first subtracting circuit, the data line is connected with the pixel driving circuit through the first subtracting circuit, the data line includes a first data line and a second data line, and the first subtracting circuit is used for the difference operation of the first data line signal and the second data line signal.
Optionally, the first subtracting circuit includes a first input resistor, a second input resistor, a feedback resistor, a balance resistor and an operational amplifier, wherein the non-inverting input end of the operational amplifier is connected with the first data line through the first input resistor, the inverting input end of the operational amplifier is connected with the second data line through the second input resistor, the inverting input end and the output end of the operational amplifier are connected through the feedback resistor, and the non-inverting input end of the operational amplifier is grounded through the balance resistor.
Optionally, the resistance value of the first input resistor, the resistance value of the second input resistor, the resistance value of the feedback resistor and the resistance value of the balance resistor are all equal.
Optionally, the data signal voltage of the second data line is greater than 1V.
Optionally, the pixel driving circuit includes a switching transistor, a driving transistor, an organic light emitting diode, and a capacitor, where the display panel further includes a low voltage power line, a control end of the switching transistor is connected to the scan line, a first end of the switching transistor is connected to an output end of the operational amplifier, a second end of the switching transistor is connected to a control end of the driving transistor, a first end of the driving transistor is connected to the high voltage power line, a second end of the driving transistor is connected to the low voltage power line through the organic light emitting diode, and the capacitor is connected to the control end of the driving transistor and the high voltage power line.
Optionally, the first subtracting circuits are connected with the data lines in a one-to-one correspondence, and all the pixel driving circuits in each column are connected with the first subtracting circuits in the corresponding column.
Optionally, the first subtracting circuits are in one-to-one correspondence with the pixel driving circuits, and each pixel driving circuit is connected with the data line of the corresponding column through the first subtracting circuit.
Optionally, the subtracting circuit includes a second subtracting circuit, the high-voltage power line is connected with the pixel driving circuit through the second subtracting circuit, the high-voltage power line includes a first high-voltage power line and a second high-voltage power line, and the second subtracting circuit is used for the difference operation of the first high-voltage power line signal and the second high-voltage power line signal.
The application also provides a display device, comprising:
a display panel;
and the main board is connected with the display panel.
The display panel and the display device disclosed by the application have the following beneficial effects:
in the application, the display panel comprises a plurality of high-voltage power lines, a plurality of scanning lines arranged in the row direction, a plurality of data lines arranged in the column direction and a pixel driving circuit corresponding to the scanning lines and the data line intersection points, wherein the high-voltage power lines at least comprise one of a first high-voltage power line and a second high-voltage power line, the data lines at least comprise one of the first data line and the second data line, at least one of the high-voltage power line and the data line is connected with the pixel driving circuit through a subtracting circuit, the subtracting circuit can subtract the signals of the first data line and the signals of the second data line, or subtract the signals of the first high-voltage power line and the signals of the second high-voltage power line, so that fluctuation caused by coupling action is reduced or eliminated, crosstalk of a display picture can be reduced or eliminated, and the display effect of the display panel is improved.
Other features and advantages of the present application will be apparent from the following detailed description, or may be learned in part by the practice of the application.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. It is apparent that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present application.
Fig. 2 is a schematic diagram showing connection between data lines and pixel driving circuits of a display panel according to an embodiment of the present disclosure.
Fig. 3 is a schematic diagram illustrating a data signal difference operation in accordance with the first embodiment of the present application.
Fig. 4 is a schematic diagram of generating a data signal according to a first embodiment of the present application.
Fig. 5 is a schematic structural diagram of a display panel in a second embodiment of the present application.
Fig. 6 is a schematic structural diagram of a display device in a third embodiment of the present application.
Reference numerals illustrate:
110. a high voltage power supply line; 111. a first high voltage power supply line; 112. a second high voltage power line; 120. a low voltage power supply line; 130. a scanning line; 140. a data line; 141. a first data line; 142. a second data line;
200. a pixel driving circuit; 210. a switching transistor; 220. a driving transistor; 230. an organic light emitting diode; 240. a capacitor;
300. a subtracting circuit; 310. a first subtracting circuit; 311. a first input resistor; 312. a second input resistor; 313. a feedback resistor; 314. balancing resistance; 315. an operational amplifier; 320. a second subtracting circuit;
10. a display panel; 20. and a main board.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the present application. One skilled in the relevant art will recognize, however, that the aspects of the application can be practiced without one or more of the specific details, or with other methods, components, devices, steps, etc. In other instances, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the application.
The present application is further described in detail below with reference to the drawings and specific examples. It should be noted that the technical features of the embodiments of the present application described below may be combined with each other as long as they do not collide with each other. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present application and are not to be construed as limiting the present application.
Example 1
Referring to fig. 1 and 2, the display panel in this embodiment includes a plurality of high voltage power lines 110, a plurality of scan lines 130 arranged in a row direction, a plurality of data lines 140 arranged in a column direction, and a pixel driving circuit 200 arranged corresponding to intersections of the scan lines 130 and the data lines 140.
The high voltage power line 110 includes at least one of the first high voltage power line 111 and the second high voltage power line 112, and the data line 140 includes at least one of the first data line 141 and the second data line 142. The display panel further includes a subtracting circuit 300, at least one of the high voltage power line 110 and the data line 140 is connected to the pixel driving circuit 200 through the subtracting circuit 300, and the subtracting circuit is used for signal difference operation of the first high voltage power line signal 111 and the second high voltage power line 112, or signal difference operation of the first data line signal 141 and the second data line 142.
When the data line 140 and the pixel driving circuit 200 are connected through the subtracting circuit 300, the data line 140 includes the first data line 141 and the second data line 142, and when the data line 140 and the pixel driving circuit 200 are directly connected, the data line 140 may include one of the first data line 141 and the second data line 142. When the high voltage power line 110 and the pixel driving circuit 200 are connected through the subtracting circuit 300, the high voltage power line 110 includes the first high voltage power line 111 and the second high voltage power line 112, and when the high voltage power line 110 and the pixel driving circuit 200 are directly connected, the high voltage power line 110 may include one of the first high voltage power line 111 and the second high voltage power line 112.
Parasitic capacitances exist between the data line 140, the high voltage power line 110 and other signal lines on the display panel, so that signals on the data line 140 and the high voltage power line 110 fluctuate due to coupling. Both the data voltage Vdata on the data line 140 and the high voltage power voltage Vdd of the high voltage power line 110 affect the brightness of the organic light emitting diode 230.
Referring to fig. 3, the signal fluctuation direction of the first data line 141 and the second data line 142 adjacently disposed in the same column is the same. Accordingly, the first high voltage power line 111 signal and the second high voltage power line 112 signal fluctuate in the same direction.
The display panel includes a plurality of pixel driving circuits 200, and the plurality of pixel driving circuits 200 are arranged in an array, and each pixel driving circuit 200 corresponds to an intersection of a scan line 130 and a data line 140 one by one. The pixel driving circuit 200 is connected to the scan line 130, the data line 140, and the high voltage power line 110. The data line 140 in order to reduce or eliminate fluctuations due to coupling, the data line 140 includes a first data line 141 signal and a second data line 142, and each of the pixel driving circuits 200 is connected to the first data line 141 signal and the second data line 142. The timing controller obtains display image data from the system-in-chip and outputs the display image data to the data driving chip, and in the process of transmitting the display image data, a logic module integrated in the timing controller calculates specific values of the voltages of the first data line 141 and the second data line 142, and finally the data driving chip generates the voltages of the first data line 141 and the second data line 142. The signals of the first data line 141 and the second data line 142 are subtracted by the subtracting circuit 300, so that the fluctuation due to the coupling effect is reduced or eliminated, the accurate data voltage Vdata is obtained, the organic light emitting diode 230 of the pixel driving circuit 200 can stably emit light, and the crosstalk of the display screen is reduced or eliminated.
In this embodiment, the display panel includes a plurality of high voltage power lines 110, a plurality of scanning lines 130 disposed in a row direction, a plurality of data lines 140 disposed in a column direction, and a pixel driving circuit 200 disposed corresponding to intersections of the scanning lines 130 and the data lines 140, the high voltage power lines 110 include at least one of the first high voltage power lines 111 and the second high voltage power lines 112, the data lines 140 include at least one of the first data lines 141 and the second data lines 142, at least one of the high voltage power lines 110 and the data lines 140 are connected to the pixel driving circuit 200 through a subtracting circuit 300, the subtracting circuit 300 may subtract the signals of the first data lines 141 and the second data lines 142, or subtract the signals of the first high voltage power lines 111 and the signals of the second high voltage power lines 112, thereby reducing or eliminating fluctuations occurring due to coupling, obtaining accurate data voltages Vdata and high voltage Vdd, and further reducing or eliminating crosstalk of a display screen, and improving display effects of the display panel.
As an example, referring to fig. 1 and 2, the subtracting circuit 300 includes a first subtracting circuit 310, the data line 140 is connected to the pixel driving circuit 200 through the first subtracting circuit 310, the data line 140 includes a first data line 141 and a second data line 142, and the first subtracting circuit 310 is used for a difference operation between the first data line 141 signal and the second data line 142 signal.
The voltage difference between the gate and the source of the driving transistor 220 in the pixel driving circuit 200 determines the turn-on degree of the driving transistor 220, and the gate voltage of the driving transistor 220 is the data voltage Vdata, so as to reduce or eliminate the fluctuation of the data voltage Vdata caused by the coupling effect, and remarkably reduce or eliminate the crosstalk of the display screen, and improve the display effect of the display panel.
Referring to fig. 1 and 2, the first subtracting circuit 310 includes a first input resistor 311, a second input resistor 312, a feedback resistor 313, a balancing resistor 314, and an operational amplifier 315, wherein a non-inverting input terminal of the operational amplifier 315 is connected to the first data line 141 through the first input resistor 311, an inverting input terminal of the operational amplifier 315 is connected to the second data line 142 through the second input resistor 312, an inverting input terminal and an output terminal of the operational amplifier 315 are connected through the feedback resistor 313, and a non-inverting input terminal of the operational amplifier 315 is grounded through the balancing resistor 314. The output voltage of the operational amplifier 315 is the data voltage Vdata, which is:
Vdata＝Rf/R(U1-U2)；
wherein Rf is the resistance of the feedback resistor 313, the resistance of the balancing resistor 314 is equal to Rf, R is the resistance of the first input resistor 311, the resistance of the second input resistor 312 is equal to R, U1 is the voltage on the first data line 141, and U2 is the voltage on the second data line 142.
That is, the first subtracting circuit 310 may be a differential proportional operating circuit.
It should be noted that, the first subtracting circuit 310 is not limited to the differential proportional circuit, and the first subtracting circuit 310 may also use other subtracting circuits to perform the subtraction of the signals of the first data line 141 and the second data line 142, as the case may be.
The first subtracting circuit 310 is a differential proportion circuit, and the differential proportion circuit realizes the subtraction of the signals of the first data line 141 and the second data line 142, and has a simple structure.
Referring to fig. 1 and 2, the resistance value of the first input resistor 311, the resistance value of the second input resistor 312, the resistance value of the feedback resistor 313, and the resistance value of the balancing resistor 314 are all equal. The output voltage of the operational amplifier 315 is the data voltage Vdata, which is:
Vdata＝U1-U2。
when the resistance of the first input resistor 311, the resistance of the second input resistor 312, the resistance of the feedback resistor 313, and the resistance of the balancing resistor 314 are equal, the data voltage Vdata is the difference between the voltage on the first data line 141 and the voltage on the second data line 142, eliminating the scaling factor, and calculating the data voltage Vdata is simpler.
In some embodiments, the data signal voltage of the second data line 142 is greater than 1V. Referring to fig. 4, specific values of the voltages of the first data line 141 and the second data line 142 are calculated by a logic module, which may be integrated on a timing controller or a system and chip. The time schedule controller obtains display picture data from the system level chip and outputs the display picture data to the data driving chip, a logic module calculates specific values of the voltages of the first data line 141 and the second data line 142 in the transmission process of the display picture data, and finally the data driving chip generates the voltages of the first data line 141 and the second data line 142.
For the second data lines 142 arranged in the column direction, the smaller the voltage of the second data lines 142, the more obvious the fluctuation caused by the coupling effect, and the data signal voltage of the second data lines 142 is set to be larger than 1V, the signal fluctuation of the second data lines 142 can be reduced, and further the fluctuation of the data voltage Vdata can be reduced.
Referring to fig. 1 and 2, the pixel driving circuit 200 includes a switching transistor 210, a driving transistor 220, an organic light emitting diode 230, and a capacitor 240, the display panel further includes a low voltage power line 120, a control terminal of the switching transistor 210 is connected to the scan line 130, a first terminal of the switching transistor 210 is connected to an output terminal of an operational amplifier 315, and a second terminal of the switching transistor 210 is connected to a control terminal of the driving transistor 220. A first terminal of the driving transistor 220 is connected to the high voltage power line 110, a second terminal of the driving transistor 220 is connected to the low voltage power line 120 through the organic light emitting diode 230, and the capacitor 240 is connected to a control terminal of the driving transistor 220 and the high voltage power line 110.
The control terminals of the switching transistor 210 and the driving transistor 220 may be gates thereof, the first terminals of the switching transistor 210 and the driving transistor 220 may be sources thereof, and the first terminals of the switching transistor 210 and the driving transistor 220 may be drains thereof.
The first subtracting circuit 310 reduces or eliminates the fluctuation of the data voltage Vdata due to the coupling effect, so as to obtain the accurate data voltage Vdata, and the structure of the pixel driving circuit 200 can be designed more simply, which is beneficial to improving the aperture ratio of the display panel.
Referring to fig. 1 and 2, the first subtracting circuits 310 are connected to the data lines 140 in a one-to-one correspondence, and each column of all the pixel driving circuits 200 is connected to the first subtracting circuits 310 of the corresponding column, specifically, to the output terminals of the same operational amplifier 315.
The first subtracting circuit 310 is connected to the data lines 140 in a one-to-one correspondence manner, and all pixel driving circuits 200 in each column share the data voltage Vdata output by the data lines 140, so that the design can reduce the design space occupied by the first subtracting circuit 310 in the display panel, and improve the aperture opening ratio of the display panel.
It should be noted that, the first subtracting circuits 310 may be connected to the data lines 140 in a one-to-one correspondence, but not limited thereto, the first subtracting circuits 310 may also be connected to the pixel driving circuits 200 in a one-to-one correspondence, and each pixel driving circuit 200 may be connected to the data lines 140 of the corresponding column through the first subtracting circuits 310, as the case may be.
When the first subtracting circuit 310 corresponds to the pixel driving circuit 200 one by one, the data voltage Vdata entering the pixel driving circuit 200 has small fluctuation caused by the coupling effect, so that the crosstalk of the display screen can be significantly reduced or eliminated, and the display effect of the display panel is improved.
Example two
The difference between the second embodiment and the first embodiment is that the subtracting circuit 300 further includes a second subtracting circuit 320.
Referring to fig. 5, the high voltage power supply line 110 is connected to the pixel driving circuit 200 through a second subtracting circuit 320, and the high voltage power supply line 110 includes a first high voltage power supply line 111 and a second high voltage power supply line 112, and the first high voltage power supply line 111 and the second high voltage power supply line 112 are each disposed in the row direction. The second subtracting circuit 320 is used for the difference operation between the signal of the first high-voltage power line 111 and the signal of the second high-voltage power line 112, and the structure of the second subtracting circuit 320 is the same as that of the first subtracting circuit 310.
It should be noted that the structure of the second subtracting circuit 320 and the structure of the first subtracting circuit 310 may be the same, but the present invention is not limited thereto, and the second subtracting circuit 320 may also use other types of subtracting circuits, as the case may be. The first high voltage power line 111 and the second high voltage power line 112 are each arranged in the row direction, but not limited thereto, and the first high voltage power line 111 and the second high voltage power line 112 may be each arranged in the column direction as the case may be.
The brightness of the organic light emitting diode 230 in the pixel driving circuit 200 is also affected by the voltage difference between the high voltage power line 110 and the low voltage power line 120, and the second subtracting circuit 320 is used to connect the high voltage power line 110 and the pixel driving circuit 200, so as to reduce the influence of the voltage fluctuation of the high voltage power line 110 on the brightness of the organic light emitting diode 230.
The display panel may include a plurality of rows of high voltage power lines 110, and the high voltage power lines 110 are in one-to-one correspondence with the second subtracting circuits 320, that is, one second subtracting circuit 320 is disposed for each high voltage power line 110.
The high voltage power lines 110 are in one-to-one correspondence with the second subtracting circuits 320, so that the design space occupied by the second subtracting circuits 320 in the display panel can be reduced.
Example III
Referring to fig. 6, the display device in this embodiment includes a display panel 10 and a main board 20, and the main board 20 is connected to the display panel 10. The display panel 10 includes the display panel 10 disclosed in the first and second embodiments.
In this embodiment, the display device includes a display panel 10, the display panel 10 includes a plurality of high voltage power lines 110, a plurality of scanning lines 130 disposed in a row direction, a plurality of data lines 140 disposed in a column direction, and a pixel driving circuit 200 disposed corresponding to intersections of the scanning lines 130 and the data lines 140, the high voltage power lines 110 include at least one of the first high voltage power lines 111 and the second high voltage power lines 112, the data lines 140 include at least one of the first data lines 141 and the second data lines 142, at least one of the high voltage power lines 110 and the data lines 140 is connected to the pixel driving circuit 200 through a subtracting circuit 300, the subtracting circuit 300 may subtract signals of the first data lines 141 and signals of the second data lines 142, or subtract signals of the first high voltage power lines 111 and signals of the second high voltage power lines 112, reduce or eliminate fluctuations due to coupling effects, and obtain accurate data voltages Vdata and high voltage Vdd, so as to reduce or eliminate crosstalk of a display screen, and improve a display effect of the display panel 10.
The terms "first," "second," and the like 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, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In this application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly, and may be, for example, fixedly attached, detachably attached, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
In the description of the present specification, reference to the terms "some embodiments," "exemplary," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present application have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the embodiments by one of ordinary skill in the art within the scope of the application, and therefore all changes and modifications that fall within the spirit and scope of the invention as defined by the claims and the specification of the application are intended to be covered thereby.
Claims (7)
1. The display panel comprises a plurality of high-voltage power lines, a plurality of scanning lines arranged in a row direction, a plurality of data lines arranged in a column direction and a pixel driving circuit arranged corresponding to the intersection points of the scanning lines and the data lines, wherein the high-voltage power lines, the scanning lines and the data lines are all connected with the pixel driving circuit;
the subtracting circuit comprises a first subtracting circuit, the data line is connected with the pixel driving circuit through the first subtracting circuit, the data line comprises a first data line and a second data line, and the first subtracting circuit is used for performing difference operation on the first data line signal and the second data line signal;
the first subtracting circuit comprises a first input resistor, a second input resistor, a feedback resistor, a balance resistor and an operational amplifier, wherein the non-inverting input end of the operational amplifier is connected with the first data line through the first input resistor, the inverting input end of the operational amplifier is connected with the second data line through the second input resistor, the inverting input end and the output end of the operational amplifier are connected through the feedback resistor, and the non-inverting input end of the operational amplifier is grounded through the balance resistor;
the pixel driving circuit comprises a switching transistor, a driving transistor, an organic light emitting diode and a capacitor, wherein the display panel further comprises a low-voltage power line, the control end of the switching transistor is connected with the scanning line, the first end of the switching transistor is connected with the output end of the operational amplifier, the second end of the switching transistor is connected with the control end of the driving transistor, the first end of the driving transistor is connected with the high-voltage power line, the second end of the driving transistor is connected with the low-voltage power line through the organic light emitting diode, and the capacitor is connected with the control end of the driving transistor and the high-voltage power line.
2. The display panel according to claim 1, wherein a resistance value of the first input resistor, a resistance value of the second input resistor, a resistance value of the feedback resistor, and a resistance value of the balance resistor are all equal.
3. The display panel of claim 1, wherein the data signal voltage of the second data line is greater than 1V.
4. The display panel according to claim 1, wherein the first subtracting circuits are connected to the data lines in a one-to-one correspondence, and all of the pixel driving circuits of each column are connected to the first subtracting circuits of the corresponding column.
5. The display panel according to claim 1, wherein the first subtracting circuits are in one-to-one correspondence with the pixel driving circuits, each of the pixel driving circuits being connected to the data line of the corresponding column through the first subtracting circuit.
6. The display panel according to claim 1, wherein the subtracting circuit includes a second subtracting circuit, the high-voltage power supply line is connected to the pixel driving circuit through the second subtracting circuit, the high-voltage power supply line includes a first high-voltage power supply line and a second high-voltage power supply line, and the second subtracting circuit is used for the difference operation of the first high-voltage power supply line signal and the second high-voltage power supply line signal.
7. A display device, comprising:
the display panel according to any one of claims 1 to 6;
and the main board is connected with the display panel.
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