CN112133250A - Organic light emitting display device and driving method thereof - Google Patents
Organic light emitting display device and driving method thereof Download PDFInfo
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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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- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
- H10K59/65—OLEDs integrated with inorganic image sensors
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Abstract
The embodiment of the application provides an organic light-emitting display device and a driving method thereof, wherein the organic light-emitting display device comprises an organic light-emitting display panel, a driving integrated circuit and a power management integrated circuit; the organic light-emitting display panel comprises a conventional display area, wherein the density of first sub-pixels which are electrically connected with first pixel driving circuits in a one-to-one correspondence mode in the conventional display area is smaller than that of second sub-pixels which are electrically connected with second pixel driving circuits in a one-to-one correspondence mode, and a first power supply voltage output port of a driving integrated circuit is electrically connected with the first pixel driving circuits through a first power supply voltage line; a second power supply voltage output port of the power management integrated circuit is electrically connected to the second pixel driving circuit via a second power supply voltage line. The power supply voltage required by the semi-transparent display area is provided by the power supply management integrated circuit, so that the power supply voltage required by the semi-transparent display area can be obtained according to actual needs, and the display brightness difference with the conventional display area can be weakened.
Description
[ technical field ] A method for producing a semiconductor device
The present disclosure relates to the field of display technologies, and in particular, to an organic light emitting display device and a driving method thereof.
[ background of the invention ]
With the rapid development of digital display products, in order to increase the screen occupation ratio, an off-screen optical information acquisition device in a display device needs to be arranged in a display area of the display device. In order to enable light required by the off-screen optical signal acquisition device to penetrate through the display area of the display device, the position of the display area where the off-screen optical signal acquisition device is arranged needs to be arranged as a light-permeable area. The light-permeable region is required to be capable of displaying or transmitting light, and the sub-pixel density, circuit density or sub-pixel structure and circuit structure in the light-permeable region are different from those in other regions. The above design may cause the display brightness of the projectable region in the display region to be different from that of the other regions.
In the prior art, a solution to the above problem is to perform Gamma correction on a data voltage at a certain gray scale. However, since Gamma correction is performed at a certain gray level, when the display device displays different gray levels in practical application, the voltage drop difference between the data voltage of the light-permeable area in the display area and the data voltage of other areas in the transmission process is large, so that the problem of display brightness difference still exists.
[ application contents ]
In view of the above, embodiments of the present application provide an organic light emitting display device and a driving method thereof to solve the above problems.
In a first aspect, an embodiment of the present application provides an organic light emitting display device, including an organic light emitting display panel, a driving integrated circuit, and a power management integrated circuit; the organic light-emitting display panel comprises a conventional display area and a semi-transparent display area, wherein the conventional display area comprises a plurality of first sub-pixels which are electrically connected with the first pixel driving circuits in a one-to-one correspondence mode, the semi-transparent display area comprises a plurality of second sub-pixels which are electrically connected with the second pixel driving circuits in a one-to-one correspondence mode, and the density of the plurality of second sub-pixels is smaller than that of the plurality of first sub-pixels; the driving integrated circuit comprises at least one first power supply voltage output port, the first pixel driving circuit is electrically connected with a first power supply voltage line, and the first power supply voltage output port is electrically connected with the first power supply voltage line; the power management integrated circuit includes at least one second power supply voltage output port, the second pixel driving circuit electrically connected to a second power supply voltage line, the second power supply voltage output port electrically connected to the second power supply voltage line.
In a second aspect, embodiments of the present application provide a driving method for driving an organic light emitting display device, which is provided in the first aspect, to perform light emitting display in a display stage.
In the organic light emitting display device and the driving method thereof provided by the embodiment of the application, the power supply voltage required by the display in the conventional display area and the power supply voltage required by the display in the semi-transparent display area are provided by different integrated circuits, namely, the power supply voltage and the power supply voltage are respectively provided by the driving integrated circuit and the power supply management integrated circuit. The power voltage required by the display of the semi-transparent display area can be obtained according to actual needs, namely, the problems of voltage drop and the like of the power voltage when the power voltage is transmitted to the semi-transparent display area can be independently considered, and then the proper power voltage is provided for the semi-transparent display area. The power supply voltage required by the semi-transparent display area is higher than that required by the conventional display area, and the power supply management integrated circuit can provide signals with more potentials relative to the driving integrated circuit, so that the power supply voltage with higher potential can be provided for the semi-transparent display area.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of an organic light emitting display device according to an embodiment of the present disclosure;
FIG. 2 is an equivalent circuit diagram of the pixel driving circuit and the sub-pixels;
fig. 3 is a cross-sectional view of an organic light emitting display panel according to an embodiment of the present disclosure;
fig. 4 is a schematic view of another organic light emitting display device provided in an embodiment of the present application;
fig. 5 is a cross-sectional view of another organic light emitting display panel according to an embodiment of the present disclosure;
fig. 6 is a schematic view of another organic light emitting display device provided in an embodiment of the present application;
fig. 7 is a timing diagram illustrating a driving operation of an organic light emitting display device according to an embodiment of the present disclosure;
fig. 8 is a timing diagram illustrating a driving sequence of another organic light emitting display device according to an embodiment of the present disclosure.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.
It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
In the description herein, it is to be understood that the terms "substantially", "approximately", "about", "substantially", and the like, as used in the claims and the examples herein, are intended to be generally accepted as not being precise, within the scope of reasonable process operation or tolerance.
It should be understood that although the terms first, second, third, etc. may be used to describe the electrode layers, etc. in the embodiments of the present application, the electrode layers, etc. should not be limited to these terms. These terms are only used to distinguish the electrode layers and the like from each other. For example, the first display electrode layer may also be referred to as a second electrode layer, and similarly, the second electrode layer may also be referred to as a first electrode layer, without departing from the scope of embodiments herein.
The applicant provides a solution to the problems of the prior art through intensive research.
Fig. 1 is a schematic diagram of an organic light emitting display device according to an embodiment of the present disclosure.
As shown in fig. 1, an organic light emitting display device provided in an embodiment of the present application includes an organic light emitting display panel DP, a power management integrated circuit PIC, and a driving integrated circuit DIC, wherein the power management integrated circuit PIC has multiple outputs to provide required power for different components of the organic light emitting display device. The driving integrated circuit DIC may control the organic light emitting display panel to perform light emitting display.
As shown in fig. 1, the organic light emitting display panel includes a normal display area AA and a semi-transmissive display area BB, and the normal display area AA generally at least partially surrounds the semi-transmissive display area BB. The normal display area AA includes a plurality of first sub-pixels 11, the semi-transmissive display area BB includes a plurality of second sub-pixels 21, and a density of the plurality of second sub-pixels 21 in the semi-transmissive display area BB is less than a density of the plurality of first sub-pixels 11 in the normal display area AA. The semi-transmissive display region BB allows light to pass through the light exit surface and the light transmission surface of the organic light emitting display panel and is more transmissive than the conventional display region AA. A photosensitive device, such as an optical fingerprint recognition sensor, a front camera, etc., may be disposed in the display panel or at a position where the backlight surface of the display panel is located in the semi-transparent display area BB.
The first sub-pixels 11 are electrically connected with the first pixel driving circuits 12 in a one-to-one correspondence manner, and the first pixel driving circuits 12 can provide light-emitting driving currents for the first sub-pixels 11; the second sub-pixels 21 are electrically connected to the second pixel driving circuits 22 in a one-to-one correspondence, and the second pixel driving circuits 22 can provide light emitting driving currents for the first sub-pixels 21. Note that, as shown in fig. 1, the first pixel driving circuit 12 and the second pixel driving circuit 22 may be disposed below the first subpixel 11 and the second subpixel 21, respectively; in addition, the second pixel driving circuit 22 may also be disposed outside the semi-transmissive display region BB to further enhance the light transmittance of the semi-transmissive display region BB.
Fig. 2 is an equivalent circuit diagram of the pixel driving circuit and the sub-pixels. It should be noted that fig. 2 is only an example of an equivalent circuit diagram of the first pixel driving circuit 12 and the second pixel driving circuit 22, the circuit structures of the first pixel driving circuit 12 and the second pixel driving circuit 22 may be in other forms, and the circuit structure of the second pixel driving circuit 22 may be different from the circuit structure of the first pixel driving circuit 12.
As shown in fig. 2, the first pixel driving circuit 12 and/or the second pixel driving circuit includes a light emission driving transistor Td, a reset transistor T1, a data voltage writing transistor T2, a threshold grabbing transistor T3, a power voltage writing transistor T4, a light emission controlling transistor T5, and a first capacitor C0. Hereinafter, the light emission driving transistor Td, the reset transistor T1, the data voltage writing transistor T2, the threshold grasping transistor T3, the power voltage writing transistor T4, and the light emission controlling transistor T5 are all P-type transistors as an example.
The source of the reset transistor T1 is electrically connected to the reset signal line REF, and the drain of the reset transistor T1 is electrically connected to the gate of the light emission driving transistor Td. The source of the DATA voltage writing transistor T2 is electrically connected to the DATA signal line DATA, and the drain of the DATA voltage writing transistor T2 is electrically connected to the source of the light emitting driving transistor Td. The source of the threshold grasping transistor T3 is electrically connected to the drain of the light emission driving transistor Td, and the drain of the threshold grasping transistor T3 is electrically connected to the gate of the light emission driving transistor Td. The source of the power supply voltage writing transistor T4 is electrically connected to a power supply voltage line PVDD, and the drain of the power supply voltage writing transistor T4 is electrically connected to the source of the light emission driving transistor Td. The source of the light emission controlling transistor T5 is electrically connected to the drain of the light emission driving transistor Td, and the drain of the light emission controlling transistor T5 is electrically connected to the light emitting device EL. A first plate of the first capacitor C0 is electrically connected to the gate of the light-emitting driving transistor Td, and a second plate of the first capacitor C0 is electrically connected to the power voltage line PVDD.
The operation of the pixel driving circuit shown in fig. 2, which includes a reset phase, a data voltage writing phase and a light emitting phase, will be described.
In the reset phase, the reset transistor T1 is turned on, and the reset signal line REF transmits a reset signal, the reset signal is written to the gate of the light emission driving transistor Td, the gate of the light emission driving transistor Td is reset, and the first capacitor C0 stores the reset signal.
In the DATA voltage writing phase, the power voltage writing transistor T4 and the light emitting control transistor T5 are turned off, the DATA voltage writing transistor T2 and the threshold grasping transistor T3 are turned on, and the DATA voltage is transmitted on the DATA signal line DATA, and since the potential of the DATA voltage is higher than that of the reset signal, the light emitting driving transistor Td is turned on and the DATA voltage is written into the gate of the light emitting driving transistor Td.
In the light emitting period, the threshold capturing transistor T3 is turned off, the power voltage writing transistor T4 and the light emitting control transistor T5 are turned on, the power voltage line PVDD transmits the power voltage, the power voltage is transmitted to the source of the light emitting driving transistor Td, and the power voltage is greater than the data voltage, the light emitting driving transistor Td generates the light emitting driving current and transmits the light emitting driving current to the light emitting device EL.
Referring to fig. 1 and 2, the power voltage line PVDD is specifically a first power voltage line L11 in the first pixel driving circuit 12, and the power voltage line PVDD is specifically a second power voltage line L21 in the second pixel driving circuit 22, that is, the power voltage writing transistor T4 in the first pixel driving circuit 12 is electrically connected to the first power voltage line L11, and the power voltage writing transistor T4 in the second pixel driving circuit 22 is electrically connected to the second power voltage line L21.
As shown in fig. 1, the driving integrated circuit DIC includes at least one first power voltage output port OUT11, and the first power voltage output port OUT11 is electrically connected to a first power voltage line L11. Here, the plurality of first pixel driving circuits 12 may share the first power voltage line L11, that is, the first power voltage line L11 is actually a mesh structure and may provide a required power voltage to the plurality of first pixel driving circuits 12 arranged in an array. In addition, since the first power supply voltage line L11 has a mesh structure, that is, an integral structure, the first power supply voltage line L11 can obtain the power supply voltage required by the first pixel driving circuit 12 from a first power supply voltage output port OUT 11.
In order to ensure that the first sub-pixels 11 in the same row obtain the substantially same power supply voltage on the first power supply voltage line L11, two first power supply voltage output ports OUT11 may be disposed in the driving integrated circuit DIC, and the two first power supply voltage ports OUT11 may respectively provide the power supply voltage for the first power supply voltage line L11 from the left and right sides.
As shown in fig. 1, the power management integrated circuit PIC includes at least one second power supply voltage output port OUT21, the second power supply voltage output port OUT21 being electrically connected to a second power supply voltage line L21. Here, the plurality of second pixel driving circuits 22 may share the second power voltage line L21, that is, the second power voltage line L21 is actually a mesh structure and may provide a required power voltage to the plurality of second pixel driving circuits 22 arranged in an array. In addition, since the second power voltage line L11 has a mesh structure, that is, an integral structure, the second power voltage line L11 can obtain the power voltage required by the second pixel driving circuit 22 from a second power voltage output port OUT 21.
In addition, in the organic light emitting display panel DP, in the actual one frame of the picture, the second sub-pixels 21 in different rows also emit light in sequence, in order to ensure that the second sub-pixels 21 in the same row obtain the substantially same power supply voltage on the second power supply voltage line L21, two second power supply voltage output ports OUT21 may be provided in the power management integrated circuit PIC, and the two second power supply voltage ports OUT21 may provide the power supply voltage for the second power supply voltage line L21 from the left and right sides.
In the conventional display stage of the organic light emitting display device provided in the embodiment of the present application, the first power voltage line L11 is provided by the driving integrated circuit DIC for transmitting the power voltage to the first pixel driving circuit 12, and the second power voltage line L21 is provided by the power management integrated circuit PIC for transmitting the power voltage to the second pixel driving circuit 22. That is, the power supply voltage required for the display in the normal display area AA and the power supply voltage required for the display in the semi-transmissive display area BB are supplied from different integrated circuits, i.e., the driver integrated circuit DIC and the power management integrated circuit PIC, respectively. The power voltage required by the display of the semi-transparent display area BB can be obtained according to actual needs, that is, the problems of voltage drop and the like of the power voltage when the power voltage is transmitted to the semi-transparent display area BB can be considered independently, so that a proper power voltage is provided for the semi-transparent display area BB, and the brightness difference between the semi-transparent display area BB and a conventional display area can be weakened.
The power supply voltage required by the semi-transmissive display area BB is higher than the power supply voltage required by the conventional display area AA, and the power management integrated circuit PIC can provide signals with more potentials than the driving integrated circuit DIC, that is, can provide a power supply voltage with a higher potential for the semi-transmissive display area BB.
In an embodiment of the present application, the organic light emitting display device further includes a first selection switch K1, and the first selection switch K1 may be specifically disposed in a non-display region of the organic light emitting display panel DP. An input terminal of the first selection switch K1 is electrically connected to the second power supply voltage line L21, and an output terminal of the first selection switch K1 is electrically connected to the first power supply voltage signal line L11. A control terminal of the first selection switch K1 may be electrically connected to a driving integrated circuit DIC, which may include a first control port OUT12, and a control terminal of the first selection switch K1 may be electrically connected to the first control port OUT 12. The control terminal of the first selection switch K1 is used to control the conduction of the input terminal and the output terminal of the first selection switch K1, and specifically, the first control port OUT12 of the driving integrated circuit DIC may output an active signal to the control terminal of the first selection switch K1 to control the conduction of the first selection switch K1.
With the above design, the power supply voltage required for some pictures or some display stages of the organic light emitting display panel DP may be provided by the power management integrated circuit PIC.
For example, in order to avoid the increase of power consumption caused by frequent wake-up of the application processor during the display stage of the display screen, the power management integrated circuit PIC may be used to provide the power supply voltage for the first pixel driving circuit 12 and the second pixel driving circuit 22 during the display stage of the display screen. And through setting up first selection switch K1, power management integrated circuit PIC only sets up second mains voltage output port OUT21, just can realize providing corresponding mains voltage for second mains voltage line L21 in the conventional display stage, provides corresponding mains voltage for first mains voltage line L11 and second mains voltage line L21 in the display stage of the screen of breathing, and need not to increase the port of power management integrated circuit PIC, reduces the design degree of difficulty, saves cost. The rest screen display (Aod) is that when the display device is basically black, namely when the display device is resting on the screen, individual pixels are still lighted to display a clock and some common information, and the time that a user presses a power key to light the whole screen to check the clock display and the information such as the presence or absence of incoming calls, short messages and the like can be reduced.
Fig. 3 is a cross-sectional view of an organic light emitting display panel according to an embodiment of the present disclosure, and fig. 4 is a schematic view of another organic light emitting display device according to an embodiment of the present disclosure.
As shown in fig. 3, the first sub-pixel 11 includes a first light emitting material layer 111, and a first electrode layer 112 and a second electrode layer 113 on the upper and lower sides of the first light emitting material layer 111, and the second sub-pixel 21 includes a second light emitting material layer 211, and a third electrode layer 212 and a fourth electrode layer 213 on the upper and lower sides of the second light emitting material layer 211. The first light emitting material layer 111 and the second light emitting material layer 211 may be the same; the first electrode layer 112 and the third electrode layer 212 may be anodes, and the second electrode layer 113 and the fourth electrode layer 213 may be cathodes, or the first electrode layer 112 and the third electrode layer 212 may be cathodes, and the second electrode layer 113 and the fourth electrode layer 213 may be anodes.
In an embodiment of the present application, referring to fig. 3 and fig. 4, the second electrode layer 113 and the fourth electrode layer 213 are disposed in an insulating manner.
The first electrode layer 112 may be electrically connected to the first pixel driving circuit 12 as an anode of the first sub-pixel 11, and specifically may be electrically connected to the light emission control transistor T5 in the first pixel driving circuit 12. The third electrode layer 212 may be electrically connected to the second pixel driving circuit 22 as an anode of the second sub-pixel 21, and specifically may be electrically connected to the light emission control transistor T5 in the second pixel driving circuit 22.
The second electrode layer 113 may serve as a cathode of the first sub-pixel 11, the fourth electrode layer 213 may serve as a cathode of the second sub-pixel 21, and cathodes of the plurality of first sub-pixels 11 may be electrically connected, and cathodes of the plurality of second sub-pixels 21 may also be electrically connected. As shown in fig. 4, the second electrode layer 113 may be a continuous surface electrode substantially covering the normal display area AA, and the fourth electrode layer 213 may be a continuous surface electrode substantially covering the semi-transmissive display area BB. The cathode of the first sub-pixel 11 is electrically connected to the first common electrode line L12, the cathode of the second sub-pixel 21 is electrically connected to the second common electrode line L22, that is, the second electrode layer 113 may be electrically connected to the first common electrode line L12, and the fourth electrode layer 213 may be electrically connected to the second common electrode line L22.
As shown in fig. 4, the driving integrated circuit DIC includes at least one first common voltage port OUT13, and the first common voltage port OUT13 is electrically connected to the first common electrode line L12. That is, the first common voltage port OUT13 may provide a desired common voltage signal to the cathodes of the plurality of first sub-pixels 11 through the first common electrode line L12. Since the cathodes of the plurality of first sub-pixels 11 are electrically connected, that is, the second electrode layer 113 is a continuous electrode, two first common voltage ports OUT13 may be disposed in the driving integrated circuit DIC for signal uniformity throughout the second electrode layer 113, and the two first common voltage ports OUT13 may provide a common voltage to the second electrode layer 113 from both sides, i.e., from both sides.
The power management integrated circuit PIC includes at least one second common voltage port OUT22, and the second common voltage port OUT22 is electrically connected to the second common electrode line L22. That is, the second common voltage port OUT22 may provide a desired common voltage signal to the cathodes of the plurality of second subpixels 21 through the second common electrode line L22. Since the cathode electrical connections of the plurality of second sub-pixels 21, that is, the fourth electrode layer 213 is a continuous electrode, two second common voltage ports OUT22 may be provided in the power management integrated circuit PIC for signal uniformity throughout the fourth electrode layer 213, and the two second common voltage ports OUT22 may supply a common voltage to the fourth electrode layer 213 from both the left and right sides or both the top and bottom sides.
In this embodiment, similar to the effect that the power management integrated circuit PIC provides the power voltage for the semi-transparent display area BB, the power management integrated circuit PIC provides the common voltage signal for the semi-transparent display area BB, and the driving integrated circuit DIC provides the common voltage signal for the conventional display area AA, so that the common voltage signal required for the display of the semi-transparent display area BB can be obtained according to actual needs, that is, the voltage drop and other problems of the common voltage signal during transmission to the semi-transparent display area BB can be considered separately, and thus a suitable common voltage signal is provided for the semi-transparent display area BB.
In an embodiment of the present application, the organic light emitting display device further includes a second selection switch K2, and the second selection switch K2 may be specifically disposed in the non-display region of the organic light emitting display panel DP. An input terminal of the second selection switch K2 is electrically connected to the second common electrode line L22, and an output terminal of the second selection switch K2 is electrically connected to the first common electrode line L12. A control terminal of the second selection switch K2 may be electrically connected to the driving integrated circuit DIC, which may include a second control port OUT14, and a control terminal of the second selection switch K2 may be electrically connected to the second control port OUT 14. The control terminal of the second selection switch K2 is used to control the conduction of the input terminal and the output terminal of the second selection switch K2, and specifically, the second control port OUT14 of the driving integrated circuit DIC may output an active signal to the control terminal of the second selection switch K2 to control the conduction of the second selection switch K2.
With the above design, the power supply voltage required for some pictures or some display stages of the organic light emitting display panel DP may be provided by the power management integrated circuit PIC.
For example, the power management integrated circuit PIC may be used to provide a common voltage for the first pixel driving circuit 12 and the second pixel driving circuit 22 during the display stage of the display screen. And through setting up second selector switch K2, power management integrated circuit PIC only sets up second common voltage port OUT22, just can realize providing corresponding mains voltage for second common electrode line L22 in the conventional display stage, and display stage provides corresponding mains voltage for first common electrode line L12 and second common electrode line L22 in the breath screen, and need not to increase the port of power management integrated circuit PIC, reduce the design degree of difficulty, save cost.
Fig. 5 is a cross-sectional view of another organic light emitting display panel according to an embodiment of the present disclosure, and fig. 6 is a schematic diagram of another organic light emitting display device according to an embodiment of the present disclosure.
As shown in fig. 5, the anode 112 of the first sub-pixel 11 is still electrically connected to the first pixel driving circuit 12, and the anode 212 of the second sub-pixel 21 is still electrically connected to the second pixel driving circuit 22. The organic light emitting display panel shown in fig. 5 is different from the organic light emitting display panel shown in fig. 3 in that the cathode of the first sub-pixel 11 is electrically connected to the cathode of the second sub-pixel 21, and the cathodes of the plurality of first sub-pixels 11 and the cathodes of the plurality of second sub-pixels 21 form a continuous whole-surface electrode 30. And the cathodes of the first sub-pixel 11 and the second sub-pixel 21 are both electrically connected to the common electrode line L31, that is, the entire surface electrode 30 is electrically connected to the common electrode line L31.
As shown in fig. 6, the power supply integrated circuit PIC includes a common voltage port OUT30, and the common voltage port OUT30 is electrically connected to the common electrode line L31. The power supply integrated circuit PIC may supply a common voltage to the first subpixel 21 and the second subpixel 22.
Fig. 7 is a timing diagram of driving an organic light emitting display device according to an embodiment of the present disclosure.
The embodiment of the present application further provides a driving method of an organic light emitting display device, which is used for driving the organic light emitting display device provided in any one of the above embodiments to perform light emitting display in a display stage.
As shown in fig. 7, the display phases of the organic light emitting display device include a normal display phase t1 in which the first power voltage output port OUT11 outputs a first power voltage signal to the first power voltage line L11 and the second power voltage output port OUT21 outputs a second power voltage signal to the second power voltage line L21 during the normal display phase t 1.
Here, since the density of the second sub-pixels 21 in the semi-transmissive display area BB is smaller than that of the first sub-pixels 11 in the normal display area AA, in order to ensure that there is no significant difference in the display luminance of the two areas, the potential of the second power supply voltage signal is generally larger than that of the first power supply voltage signal during the normal display period t 1.
In the driving method of the organic light emitting display device provided by the embodiment of the application, in the normal display stage, a first power voltage required for the normal display area AA display and a second power voltage required for the semi-transparent display area BB display are provided by different integrated circuits, namely, a driving integrated circuit DIC and a power management integrated circuit PIC respectively. The second power voltage required by the display of the semi-transparent display area BB can be obtained according to actual needs, that is, the problems of voltage drop and the like of the second power voltage when the second power voltage is transmitted to the semi-transparent display area BB can be considered separately, so as to provide a suitable second power voltage for the semi-transparent display area BB.
And the potential of the second power voltage required by the semi-transparent display area BB is higher than the potential of the first power voltage required by the conventional display area AA, and the power management integrated circuit PIC can provide signals with more potentials relative to the driving integrated circuit DIC, that is, can provide the second power voltage with higher potential for the semi-transparent display area BB.
As shown in fig. 7, the display phase of the organic light emitting display device further includes a breath display phase t2, in the breath display phase t2, a part of the first pixel driving circuits 12 outputs a light emitting driving current to drive a part of the first sub-pixels 11 of the regular display area AA to emit light, and a part of the second pixel driving circuits 22 may also output a light emitting driving current to drive at least a part of the second sub-pixels 21 to emit light. The rest screen display stage t2 is a stage when the organic light emitting display device enters the rest screen display, and the rest screen display (Aod) is that when the display device is basically black screen, i.e. when the rest screen is displayed, individual pixels are still lighted to display a clock and some common information, which can reduce the time that a user presses a power key to light the whole screen to check the clock display and the information such as incoming calls, short messages and the like.
The organic light emitting display device further includes a first selection switch K1, an input terminal of the first selection switch K1 is electrically connected to the second power voltage line L21, an output terminal of the first selection switch K1 is electrically connected to the first power voltage signal line L11, and a control terminal of the first selection switch K1 is electrically connected to the driving integrated circuit DIC.
During the normal display period t1, the driving integrated circuit DIC outputs a turn-off signal to the control terminal of the first selection switch K1 through the first control port OUT12, and controls the input terminal and the output terminal of the first selection switch K1 to turn off. The first supply voltage line L11 obtains the first supply voltage signal from the first supply voltage output port OUT11 of the drive integrated circuit DIC and the second supply voltage line L21 obtains the second supply voltage signal from the second supply voltage output port OUT21 of the power management integrated circuit PIC.
In the screen displaying stage t2, the driving integrated circuit DIC outputs a conducting signal to the control terminal of the first selection switch K1 through the first control port OUT12, controls the input terminal and the output terminal of the first selection switch K1 to be conducted, and the first power voltage output port OUT11 of the driving integrated circuit DIC stops outputting the signal. The second power supply voltage output port outputs a third power supply voltage signal to the second power supply voltage line, the second power supply voltage line L21 obtains the third power supply voltage signal from the second power supply voltage output port OUT21 of the power management integrated circuit PIC, and the third power supply voltage signal is transferred to the first power supply voltage line L11 through the first selection switch K1. That is, in the screen display stage t2, the first power supply voltage line L11 and the second power supply voltage line L21 each receive the third power supply voltage signal, and the third power supply voltage is obtained through the second power supply voltage output port OUT21 of the power management integrated circuit PIC.
In the screen display stage t2, the third power voltages required by the normal display area AA and the semi-transparent display area BB are both provided by the power management integrated circuit PIC, and the normal display area AA obtains the corresponding third power voltage from the second power voltage line L21 through the turned-on first selection switch K1, without increasing the ports of the power management integrated circuit PIC, thereby reducing the design difficulty and saving the cost.
As described in the above embodiment, the anode of the first sub-pixel 11 is electrically connected to the first pixel driving circuit 12, and the anode of the second sub-pixel 21 is electrically connected to the second pixel driving circuit 22. The cathode of the first sub-pixel 11 is electrically connected to the first common electrode line L12, and the cathode of the second sub-pixel 21 is electrically connected to the second common electrode line L22.
The driving integrated circuit DIC further comprises at least one first common voltage port OUT13, the first common voltage port OUT13 being electrically connected with the first common electrode lines L12; the power management integrated circuit PIC further comprises at least one second common voltage port OUT23, the second common voltage port OUT23 being electrically connected by a second common electrode line L22.
In the conventional display stage t1, the first common voltage port OUT13 of the driving integrated circuit DIC outputs a first common voltage signal to the first common electrode lines L12, and the second common voltage port OUT23 of the power management integrated circuit PIC outputs a second common voltage signal to the second common electrode lines L22.
The second common voltage signal required by the semi-transparent display area BB is provided by the power management integrated circuit PIC, and the first common voltage signal required by the conventional display area AA is provided by the driving integrated circuit DIC, so that the second common voltage signal required by the semi-transparent display area BB for display can be obtained according to actual needs, that is, the problems of voltage drop and the like of the second common voltage signal when being transmitted to the semi-transparent display area BB can be considered separately, and a proper second common voltage signal is provided for the semi-transparent display area BB.
In one embodiment of the present application, the organic light emitting display device further includes a second selection switch K2, an input terminal of the second selection switch K2 is electrically connected to the second common electrode line L22, an output terminal of the second selection switch K2 is electrically connected to the first common electrode line L12, and a control terminal of the second selection switch K2 is electrically connected to the driving integrated circuit PIC. In the screen display stage t2, the driving integrated circuit PIC controls the input terminal and the output terminal of the second selection switch K2 to be conductive through the control terminal of the second selection switch K2, the second common voltage port OUT22 outputs a third common voltage signal to the second common electrode line L22, and the third common voltage signal is transmitted to the first common electrode line L12 through the second selection switch K2.
In the screen display stage t2, the third common voltage signals required by the normal display area AA and the semi-transparent display area BB are both provided by the power management integrated circuit PIC, and the normal display area AA obtains and provides the corresponding third common voltage signals from the second power voltage line L21 through the turned-on first selection switch K1, without increasing ports of the power management integrated circuit PIC, thereby reducing design difficulty and saving cost.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.
Claims (11)
1. An organic light emitting display device, comprising:
an organic light emitting display panel including a normal display region and a semi-transmissive display region; the normal display area comprises a plurality of first sub-pixels, the semi-transparent display area comprises a plurality of second sub-pixels, and the density of the second sub-pixels is smaller than that of the first sub-pixels; the first sub-pixels are electrically connected with the first pixel driving circuits in a one-to-one correspondence mode, the second sub-pixels are electrically connected with the second pixel driving circuits in a one-to-one correspondence mode, the first pixel driving circuits are electrically connected with a first power supply voltage line, and the second pixel driving circuits are electrically connected with a second power supply voltage line;
a driver integrated circuit including at least one first supply voltage output port electrically connected to the first supply voltage line;
a power management integrated circuit comprising at least one second power supply voltage output port electrically connected with the second power supply voltage line.
2. The organic light-emitting display device according to claim 1, further comprising a first selection switch, wherein an input terminal of the first selection switch is electrically connected to the second power voltage line, an output terminal of the first selection switch is electrically connected to the first power voltage signal line, a control terminal of the first selection switch is electrically connected to the driving integrated circuit, and the control terminal of the first selection switch is configured to control conduction of the input terminal and the output terminal of the first selection switch.
3. The organic light-emitting display device according to claim 1, wherein an anode of the first sub-pixel is electrically connected to the first pixel driving circuit, and a cathode of the first sub-pixel is electrically connected to a first common electrode line; the anode of the second sub-pixel is electrically connected with the second pixel driving circuit, and the cathode of the second sub-pixel is electrically connected with a second common electrode line;
the driving integrated circuit further comprises at least one first common voltage port electrically connected with the first common electrode line;
the power management integrated circuit further comprises at least one second common voltage port electrically connected to the second common electrode line.
4. The organic light-emitting display device according to claim 3, further comprising a second selection switch, wherein an input terminal of the second selection switch is electrically connected to the second common electrode line, an output terminal of the second selection switch is electrically connected to the first common electrode line, a control terminal of the second selection switch is electrically connected to the driving integrated circuit, and the control terminal of the second selection switch is configured to control conduction of the input terminal and the output terminal of the second selection switch.
5. The organic light-emitting display device according to claim 1, wherein an anode of the first sub-pixel is electrically connected to the first pixel driving circuit, and an anode of the second sub-pixel is electrically connected to the second pixel driving circuit; the cathode of the first sub-pixel and the cathode of the second sub-pixel are electrically connected with a common electrode line; the power supply integrated circuit comprises a common voltage port, and the common voltage port is electrically connected with the common electrode wire.
6. A driving method of an organic light emitting display device for driving the organic light emitting display device according to any one of claims 1 to 5 to perform light emitting display in a display stage.
7. The driving method according to claim 6, wherein the display phase of the organic light emitting display device includes a normal display phase;
in the normal display phase, the first power supply voltage output port outputs a first power supply voltage signal to the first power supply voltage line, and the second power supply voltage output port outputs a second power supply voltage signal to the second power supply voltage line.
8. The driving method according to claim 7, wherein the display phase of the organic light emitting display device further comprises a breath-screen display phase, and in the breath-screen display phase, a part of the first pixel driving circuits output light-emitting driving currents to drive a part of the first sub-pixels of the normal display area to emit light.
9. The driving method according to claim 8, wherein the organic light emitting display device further comprises a first selection switch, an input terminal of the first selection switch is electrically connected to the second power voltage line, an output terminal of the first selection switch is electrically connected to the first power voltage line, and a control terminal of the first selection switch is electrically connected to the driving integrated circuit;
in the breath screen display stage, the driving integrated circuit controls the input end and the output end of the first selection switch to be connected through the control end of the first selection switch, the second power supply voltage output port outputs a third power supply voltage signal to the second power supply voltage line, and the third power supply voltage signal is transmitted to the first power supply voltage line through the first selection switch.
10. The driving method according to claim 8, wherein an anode of the first sub-pixel is electrically connected to the first pixel driving circuit, and a cathode of the first sub-pixel is electrically connected to a first common electrode line; the anode of the second sub-pixel is electrically connected with the second pixel driving circuit, and the cathode of the second sub-pixel is electrically connected with a second common electrode line; the driving integrated circuit further comprises at least one first common voltage port electrically connected with the first common electrode line; the power management integrated circuit further comprises at least one second common voltage port electrically connected with the second common electrode line;
in the normal display stage, the first common voltage port outputs a first common voltage signal to the first common electrode line, and the second common voltage port outputs a second common voltage signal to the second common electrode line.
11. The driving method according to claim 10, wherein the organic light emitting display device further comprises a second selection switch, an input terminal of the second selection switch is electrically connected to the second common electrode line, an output terminal of the second selection switch is electrically connected to the first common electrode line, and a control terminal of the second selection switch is electrically connected to the driving integrated circuit;
in the information screen display stage, the driving integrated circuit controls the input end and the output end of the second selection switch to be conducted through the control end of the second selection switch, the second common voltage port outputs a third common voltage signal to the second common electrode line, and the third common voltage signal is transmitted to the first common electrode line through the second selection switch.
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