CN114882844B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN114882844B CN114882844B CN202210538705.3A CN202210538705A CN114882844B CN 114882844 B CN114882844 B CN 114882844B CN 202210538705 A CN202210538705 A CN 202210538705A CN 114882844 B CN114882844 B CN 114882844B
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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]
- G09G3/3266—Details of drivers for scan 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
- 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]
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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
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/04—Structural and physical details of display devices
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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
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The invention provides a display panel and a display device, comprising: the display device comprises a first display area, a second display area and a first pixel, wherein the first pixel is positioned in the first display area and comprises a first pixel circuit and a first light-emitting unit; a second pixel located in the second display region, the second pixel including a second pixel circuit and a second light emitting unit; a first signal line for transmitting a first signal to a first input terminal of the first pixel circuit; wherein, the negative pole of the second light emitting unit is electrically connected with the first signal line. According to the invention, the first signal lines are multiplexed, so that the frame width of the display panel is reduced, and the display uniformity of the display panel is improved.
Description
Technical Field
The present invention relates to the technical field of electronic devices, and more particularly, to a display panel and a display device.
Background
Along with the development of scientific technology, more and more electronic devices with display functions are widely applied to daily life and work of people, bring great convenience to daily life and work of people, and become an indispensable important tool for people at present. The main component of the electronic device for realizing the display function is a display panel.
To meet the increasing demands of people, electronic devices have a full screen function. In the prior art, the full-screen is generally realized through the under-screen camera technology, namely, a transparent display area is arranged at the position of the camera corresponding to the screen, so that the full-screen is realized and the camera shooting function is ensured.
In the prior art, a transparent display area is arranged at the position of a camera corresponding to a screen, so that the display effect of the transparent display area corresponding to the camera is different from that of other display areas, and the frame is large due to the fact that the circuit wiring corresponding to the transparent display area is different from that of the circuit wiring of other display areas, so that the narrow frame is not easy to realize.
Disclosure of Invention
In view of the above, the present invention provides a display panel and a display device, which have the following technical solutions:
a display panel, the display panel has the first display area and the second display area, locate at the first pixel of the first display area, the first pixel includes the first pixel circuit and first luminescent unit;
a second pixel in the second display region, the second pixel including a second pixel circuit and a second light emitting unit;
a first signal line for transmitting a first signal to a first input terminal of the first pixel circuit;
wherein, the cathode of the second light emitting unit is electrically connected with the first signal line.
The application also provides a display device comprising the display panel.
In the display panel and the display device provided by the technical scheme of the application, the first signal wire is used for transmitting the first signal to the first input end of the first pixel circuit and is electrically connected with the cathode of the second light-emitting unit, so that the first signal wire multiplexing the first pixel and the second pixel is realized, the number of signal wires of the display panel is reduced, the frame width of the display panel is further reduced, and the display uniformity of the display panel is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 11 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 13 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 14 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 15 is a schematic view of a portion of a display panel according to an embodiment of the present invention;
fig. 16 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 17 is a schematic diagram of a display panel according to another embodiment of the present invention;
FIG. 18 is a schematic diagram of a display panel according to another embodiment of the present invention;
fig. 19 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 20 is a schematic diagram of a part of a circuit structure of an electrostatic protection circuit according to an embodiment of the present invention;
fig. 21 is a schematic structural diagram of a display device according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
With the development of display technology, different areas of the display panel often bear different functions, and the light emitting colors of the light emitting units, the distribution densities of the light emitting units, and the number of the light emitting units driven by the pixel circuits in different areas may also be different, so that the differences are required to be respectively adjusted for different display areas in order to ensure that the display effect finally presented by the display panel is better in uniformity.
Because the power supply signals received by the pixel units have very important influence on the uniformity of the driving current and the display effect received by the light emitting units, the power supply signals received by the first display area and/or the second display area can be independently adjusted in the scheme defined by the application, so that a foundation is provided for realizing different functions respectively on the premise of ensuring the uniformity of the display effect for the first display area and the second display area.
In the conventional wiring of the display panel, two independent signal lines are required for the first display area and the second display area to provide the required power signals for the first display area and the second display area, which also results in a larger frame area of the display panel, and is disadvantageous for the narrow frame design of the display panel.
Based on this, referring to fig. 1, fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention, where the display panel includes a first display area AA and a second display area BB, and a first pixel 11 located in the first display area AA, and a second pixel 12 located in the second display area BB, and optionally, the second display area BB may be an area with reduced pixel arrangement density or reduced pixel area in the display panel, for example, may be an area where an under-screen sensor is disposed, for example, an area where a camera or an under-screen fingerprint sensor is disposed, where the light transmittance of the second display area BB needs to be greater than that of the first display area AA.
The first display area AA at least partially surrounds the second display area BB, and the boundary shape of the second display area BB is not limited in this application, and is described only as a quadrangle.
Referring to fig. 2, fig. 2 is a schematic structural diagram of another display panel according to an embodiment of the present invention, where the first pixel 11 includes a first pixel circuit 111 and a first light emitting unit 112, the second pixel 12 includes a second pixel circuit 121 and a second light emitting unit 122, and as shown in fig. 2, the display panel further includes a first signal line L1, the first signal line L1 is used for transmitting a first signal VA to a first input end of the first pixel circuit 111, and the first signal line L1 is further electrically connected to a cathode of the second light emitting unit 122 and transmits the first signal VA to a cathode of the second light emitting unit 122.
As can be seen, in the present application, the first signal VA can be transmitted to the first input terminal of the first pixel circuit 111 by multiplexing the first signal line L1, and the first signal VA can also be used as a power signal electrically connected to the cathode of the second light emitting unit 122 in the second pixel circuit 121; the first signal VA is different from the cathode signal of the first light emitting unit 112, and the adjustment of the power signal received by the second display area BB is also realized, so that the uniformity of the display effect finally presented by the display panel is guaranteed to be better, and the first signal line L1 is multiplexed by the first display area AA and the second display area BB, so that no additional signal wiring is required to be arranged, the frame size of the display panel can be obviously reduced, and the narrow frame design of the display panel is more facilitated.
Optionally, in another embodiment of the present invention, referring to fig. 3, fig. 3 is a schematic structural diagram of another display panel according to an embodiment of the present invention, and the first signal line L1 is coupled to an anode of the first light emitting unit 112.
In this embodiment, the first signal VA transmitted on the first signal line L1 may be used as the anode reset signal Vref1 of the first light emitting unit 112, for performing a reset process on the anode of the first light emitting unit 112, so as to ensure the light emitting performance of the first light emitting unit 112, and further improve the display effect of the display panel.
That is, the anode reset signal Vref1 of the first light emitting unit 112 in the first display area AA is simultaneously used as the power signal of the second light emitting unit 122 in the second display area BB in the present application.
Note that the first signal line L1 is coupled to the anode of the first light emitting unit 112 through the first pixel circuit 111.
Optionally, in another embodiment of the present invention, referring to fig. 4, fig. 4 is a schematic structural diagram of another display panel according to an embodiment of the present invention, and the first signal line L1 is coupled to a gate of the first driving transistor M1 of the first pixel circuit 111.
In this embodiment, as shown in fig. 4, the first pixel circuit 111 at least includes a first driving transistor M1, where the first driving transistor M1 is coupled to the anode of the first light emitting unit 112 for providing a driving current to the first light emitting unit 112, and the first light emitting unit 112 emits light in response to the driving current.
The first signal line L1 is coupled to the gate of the first driving transistor M1, which can be understood that the first signal VA transmitted on the first signal line L1 can be used as the gate reset signal Vref2 of the first driving transistor M1, for performing a reset process on the gate of the first driving transistor M1, so as to ensure the stability of the driving current provided by the first driving transistor M1, and further improve the display effect of the display panel.
That is, the gate reset signal Vref2 of the first driving transistor M1 in the first display area AA is simultaneously used as the power signal of the second light emitting unit 122 in the second display area BB in the present application.
In fig. 4, the first signal line L1 is connected to the gate of the first driving transistor M1 through the transistor M2, and the anode reset signal Vref1 of the first light emitting unit 112 is transmitted to the anode of the first light emitting unit 112 through the transistor M3.
Optionally, in another embodiment of the present invention, referring to fig. 5, fig. 5 is a schematic structural diagram of another display panel provided in an embodiment of the present invention, the first signal line L1 is coupled to the anode of the first light emitting unit 112, and the first signal line L1 is coupled to the gate of the first driving transistor M1 of the first pixel circuit 111.
In this embodiment, the first signal VA transmitted on the first signal line L1 is used as both the anode reset signal Vref1 of the first light emitting unit 112 and the gate reset signal Vref2 of the first driving transistor M1, where Vref1 = Vref2 = Vref for resetting the anode of the first light emitting unit 112 and resetting the gate of the first driving transistor M1, that is, by one signal trace in the first pixel circuit 111, double reset of the first light emitting unit 112 and the first driving transistor M1 is achieved, and the first signal line L1 is multiplexed again as the power supply signal of the second light emitting unit 122 in the second display area BB.
Optionally, in another embodiment of the present invention, as shown in fig. 2-5, the display panel further includes a first power signal line L0, where the first power signal line L0 is electrically connected to the cathode of the first light emitting unit 112 and is used to provide the first power signal VEE to the cathode of the first light emitting unit 112.
That is, in the present application, the first power signal VEE is provided to the cathode of the first light emitting unit 112 through the first power signal line L0 in the first pixel circuit 111 located in the first display area AA, and the power signal is provided to the cathode of the second light emitting unit 122 through the first signal line L1 in the second pixel circuit 121 located in the second display area BB, which obviously also realizes the adjustment of the power signals received by the first display area AA and the second display area BB, thereby ensuring that the display effect uniformity of the display panel finally presented is better.
Wherein the voltage of the first signal VA is V1; the first power signal line L0 is used for transmitting a first power signal VEE, and the voltage of the first power signal VEE is V2.
Wherein V1 is less than V2, and I V2-V1I is not less than 0.5V.
Specifically, when the first signal line L1 is coupled to the anode of the first light emitting unit 112, in order to avoid the situation that V1 is less than V2 when the first light emitting unit 112 is in the non-light emitting stage, and when V2-V1 is not less than 0.5V, the first light emitting unit 112 can be ensured to effectively reset the first light emitting unit 112 on the premise that the first light emitting unit 112 is not in the light emitting stage, so as to ensure the light emitting performance of the first light emitting unit 112, and further improve the display effect of the display panel.
Optionally, in another embodiment of the present invention, referring to fig. 6, fig. 6 is a schematic structural diagram of another display panel provided in an embodiment of the present invention, where the display panel further includes a second signal line L2, and the second signal line L2 is used for transmitting a second signal VGL.
The second signal line L2 is coupled to the gate of the second driving transistor T1 of the second pixel circuit 121, and the second signal line L2 is coupled to the anode of the second light emitting unit 122.
In this embodiment, as shown in fig. 6, the second pixel circuit 121 includes at least a second driving transistor T1, and the second driving transistor T1 is coupled to the anode of the second light emitting unit 122 for providing a driving current to the second light emitting unit 122, and the second light emitting unit 122 emits light in response to the driving current.
The second signal VGL transmitted on the optional second signal line L2 is used as an anode reset signal of the second light emitting unit 122 and a gate reset signal of the second driving transistor T1 at the same time, for performing a reset process on the anode of the second light emitting unit 122 and performing a reset process on the gate of the second driving transistor T1, that is, a signal wiring in the second pixel circuit 121, so as to realize dual reset of the second light emitting unit 122 and the second driving transistor T1.
In fig. 6, the second signal line L2 is connected to the gate of the second driving transistor T1 through the transistor T2, and is connected to the anode of the second light emitting unit 122 through the transistor T3.
Optionally, the voltage of the first signal VA is V1, and the voltage of the second signal VGL is V3.
Wherein V3 is less than V1, and I V3-V1I is not less than 1V.
Specifically, since the cathode of the second light emitting unit 122 is electrically connected to the first signal line L1, and receives the first signal VA as a power signal, in fig. 6, va=vref is taken as an example for illustration, and the anode of the second light emitting unit 122 is coupled to the second signal line L2, and receives the second signal VGL as an anode reset signal of the second light emitting unit 122, in order to avoid that V3 is less than V1 when the second light emitting unit 122 is in a non-light emitting stage, and in case that V3-V1 is equal to or greater than 1V, it is ensured that the second light emitting unit 122 is effectively reset and the second driving transistor T1 is effectively reset on the premise that no light is stolen, the light emitting performance of the second light emitting unit 122 and the stability of the driving current provided by the second driving transistor T1 are ensured, and the display effect of the display panel is further improved.
Optionally, in another embodiment of the present invention, referring to fig. 7, fig. 7 is a schematic structural diagram of another display panel according to an embodiment of the present invention, where the display panel further includes a third signal line L3, and the third signal line L3 is used for transmitting a third signal Vref3.
The first signal line L1 is coupled to the anode of the first light emitting unit 112, the third signal line L3 is coupled to the gate of the first driving transistor M1 of the first pixel circuit 111, and the third signal line L3 is coupled to the gate of the second driving transistor T1 of the second pixel circuit 121.
In this embodiment, the first signal VA transmitted on the first signal line L1 is used as the anode reset signal Vref1 of the first light emitting unit 112 for resetting the anode of the first light emitting unit 112; the third signal Vref3 transmitted on the third signal line L3 is used as a gate reset signal of the first driving transistor M1 for performing a reset process on the gate of the first driving transistor M1, that is, two signal lines are used in this embodiment of the present application to transmit the reset signals required by the anode of the first light emitting unit 112 and the gate of the first driving transistor M1, respectively.
Further, the multiplexing third signal line L3 is coupled to the gate of the second driving transistor T1 of the second pixel circuit 121 in the second display area BB, so as to reset the gate of the second driving transistor T1; that is to say, the third signal line L3 is multiplexed, and the third signal Vref3 transmitted on the third signal line L3 is used as the gate reset signal of the first driving transistor M1 and the gate reset signal of the second driving transistor T1 at the same time, so that one signal trace can be omitted, the number of traces required by the display panel can be reduced, the wiring difficulty can be simplified, and the narrow frame design of the display panel is facilitated.
The voltage of the first signal VA is V1, and the voltage of the third signal Vref3 is V4, wherein V1 > V4.
Specifically, under the condition that the voltage for resetting the anode of the first light emitting unit 112 is greater than the voltage for resetting the gate of the first driving transistor M1, the effective resetting of the first light emitting unit 112 and the effective resetting of the first driving transistor M1 can be realized, the light emitting performance of the first light emitting unit 112 and the stability of the driving current provided by the first driving transistor M1 are ensured, and the display effect of the display panel is further improved.
For example, V1 may be-3.5V, V2 may be-4.5V, and setting the voltage of the first signal VA higher is advantageous for improving uniformity and smear improvement of the display panel under low brightness display.
In another embodiment of the present invention, referring to fig. 8, fig. 8 is a schematic structural diagram of another display panel according to an embodiment of the present invention, a voltage of the first signal VA is V1, fig. 8 illustrates va=vref as an example, a cathode of the first light emitting unit 112 is connected to the first power signal VEE, a voltage of the first power signal VEE is V2, an anode of the first light emitting unit 112 is coupled to the second power signal VDD1, a voltage of the second power signal VDD1 is V5, an anode of the second light emitting unit 122 is coupled to the third power signal VDD2, and a voltage of the third power signal VDD2 is V6.
Wherein I V6-V1I > V5-V2I.
At this time, the anode of the first light emitting unit 112 and the anode of the second light emitting unit 122 receive different power signals to improve uniformity of display effects of the first display area AA and the second display area BB.
Further, in the present embodiment, two sets of VDD and VEE traces are adopted in the first display area AA and the second display area BB, that is, the first display area AA adopts VDD1 and VEE1, the second display area BB adopts VDD2 and VEE2, but in the layout design process of the display panel, the layout design of the two sets of VDD and VEE traces has no need of influencing the support, frame size and pixel size of the IC (Integrated Circuit ), and the like, so in the embodiment of the present invention, fig. 9 is a schematic structure diagram of the further display panel provided by the embodiment of the present invention, VGH signals are adopted as VDD2 of the second display area BB, that is, vgh=vdd 2, the Vref signals in the first pixel circuit 111 in the first display area AA are adopted as VEE2 of the second display area BB, that is VEE 2=vref, and VDD2 > VDD1, the multiplexing design of the signal line does not need to set up the additional sets of VDD and VEE traces for the second display area BB, and thus, in the embodiment of the present invention, the size of the VDD and/or VDD2 is better for the IC support, and the size of the second display area BB is designed to reduce the same as VDD/BB or the second pixel size, that the second pixel size is smaller than VDD2, and the second pixel size is further, and the luminance of the second display area BB is reduced, and the luminance of the second display area is further, the luminance is reduced, and the luminance of the second display area is reduced, and the luminance is further reduced, and the luminance of the second display area is 122 is increased.
Alternatively, the VGH signal may be led out through a gate driving circuit in the display panel.
Note that VEE1 in fig. 9 is the same as VEE in other figures, i.e., vee1=vee.
Or, referring to fig. 10, fig. 10 is a schematic structural diagram of a display panel according to another embodiment of the invention, an anode of the first light emitting unit 112 is coupled to the second power signal line L4, and an anode of the second light emitting unit 122 is coupled to the second power signal line L4.
At this time, the anode of the first light emitting unit 112 and the anode of the second light emitting unit 122 are connected to the same power signal line for receiving the same power signal VDD.
Optionally, in another embodiment of the present invention, referring to fig. 11, fig. 11 is a schematic structural diagram of a display panel according to an embodiment of the present invention, referring to fig. 12, fig. 12 is a schematic structural diagram of a display panel according to an embodiment of the present invention, and the first pixel circuit 111 further includes a transistor M4, a transistor M5, a transistor M6, a transistor M7, and a capacitor Cst1, and is combined with the first driving transistor M1, the transistor M2, and the transistor M3 to form a first pixel circuit of 7T1C to control an operation state of the first light emitting unit 112.
In fig. 4 to 8 and 10, only a part of transistors in the first pixel circuit 111 and/or the second pixel circuit 121 are illustrated, and for the sake of more clearly describing the connection relationship of signal lines and the signal transfer relationship, the parts such as transistors and capacitors in the part of pixel circuits are omitted, and not fully illustrated.
Optionally, as shown in fig. 11 and 12, the second pixel circuit 112 further includes a transistor T4, a transistor T5, a transistor T6, a transistor T7, and a capacitor Cst2, and is combined with the second driving transistor T1, the transistor T2, and the transistor T3 to form a second pixel circuit 7T1C to control the operation state of the second light emitting unit 122.
In fig. 11, the first pixel circuit 111 and the second pixel circuit 121 are each described by taking an example in which the light emitting unit and the driving transistor receive the same reset signal Vref, and in fig. 12, the light emitting unit and the driving transistor in the first pixel circuit 111 and the second pixel circuit 121 receive different reset signals.
Wherein, the voltage of Vref can be-3.5V to-5V, the voltage of VEE can be-3V, the voltage of VGL can be-7V, the voltage of Vref1 can be-4.5V, and the voltage of Vref2 can be-3.5V.
Optionally, in another embodiment of the present invention, referring to fig. 13, fig. 13 is a schematic structural diagram of another display panel provided in an embodiment of the present invention, where the display panel further includes: a non-display area CC at least partially surrounding the second display area BB, the second signal line L2 being located in the non-display area CC; it is understood that the non-display area CC is a frame area of the display panel.
The display panel includes a signal input terminal 10, the signal input terminal 10 being electrically connected to the first signal line L1; the non-display area CC includes a first side CC1 and a second side CC2 disposed opposite to each other in a first direction, and a distance between the second side CC2 and the signal input terminal 10 is greater than a distance between the first side CC1 and the signal input terminal 10, and the first direction X is parallel to a plane of the display panel.
Along the first direction X, the second display area BB is located between the first side CC1 and the second side CC2, and the second signal line L2 includes a first portion L21, the first portion L21 being located at the first side CC1.
Or, referring to fig. 14, fig. 14 is a schematic structural diagram of another display panel according to an embodiment of the invention, wherein a first portion L21 is located on the second side CC2.
Specifically, the non-display area CC includes a first side CC1 and a second side CC2, wherein the first side CC1 may be understood as a side of the top of the display panel, and the second side CC2 may be understood as a side of the bottom of the display panel.
The signal input terminal 10 on the display panel is a terminal bound with an IC (Integrated Circuit ) on the display panel, and the signal input terminal 10 is used for realizing connection between a signal wire and the IC, so as to realize signal transmission and control operation of multiple functions of the display panel.
Alternatively, the IC includes, but is not limited to, a driving IC for controlling the operation of the display panel.
Based on the distance between the second display area BB and the first side CC1 and the second side CC2 in the first direction X, assuming that the second display area BB is closer to the first side CC1, the first portion L12 may be preferably disposed on the side closer to the first side CC1, and further the distance between the second display area BB and the second signal line L2 may be shortened to simplify the wiring difficulty.
Alternatively, as shown in fig. 13 and 14, the first portion L21 of the second signal line L2 is electrically connected to the second pixel 12 in the second display area BB through the first wiring L4, the first wiring L4 extending in the first direction X.
Further, referring to fig. 15, fig. 15 is a schematic cross-sectional view of a portion of a display panel according to an embodiment of the present invention, in order to avoid the problem of signal interference between a signal transmitted on a first signal line L1 and a signal transmitted on a first wiring L4, in an embodiment of the present invention, the first signal line L1 and the first wiring L4 are located in different conductive layers, so as to ensure stability of the signal transmitted on the first signal line L1 and stability of the signal transmitted on the first wiring L4, thereby integrally improving display performance of the display panel, wherein T represents a transistor, and Q represents a light emitting unit; in fig. 15, a structure in which the light emitting unit Q is an OLED light emitting unit is taken as an example for illustration, and in the embodiment of the present application, the light emitting unit may be an LED light emitting unit or a quantum dot light emitting unit.
As shown in fig. 15, the display panel includes: the pixel comprises a substrate 101, a buffer layer 102 positioned on one side of the substrate 101, an active layer poly positioned on one side of the buffer layer 102 away from the substrate 101, a dielectric layer 103 positioned on one side of the active layer poly away from the substrate 101, a first metal layer M1 positioned on one side of the dielectric layer 103 away from the substrate 101, a first insulating layer 104 positioned on one side of the first metal layer M1 away from the substrate 101, a metal layer MC positioned on one side of the first insulating layer 104 away from the substrate 101, a second insulating layer 105 positioned on one side of the metal layer MC away from the substrate 101, a second metal layer M2 positioned on one side of the second insulating layer 105 away from the substrate 101, a third insulating layer 106, a fourth insulating layer 107 and a fifth insulating layer 108 positioned on one side of the second metal layer M2 away from the substrate 101, a third metal layer M3 positioned on one side of the fifth insulating layer 108 away from the substrate 101, a sixth insulating layer 109 positioned on one side of the sixth insulating layer 109 away from the substrate 101, and a pixel defining layer 111 positioned on one side of the planarization layer 110 away from the substrate 101.
Wherein the first signal line L1 is located in the metal layer MC, and the first wiring L4 is located in the second metal layer M2; it should be noted that, when the first signal line L1 is a driving transistor and/or a light emitting unit transmits a reset signal, the transverse wiring may be located in the metal layer MC, and the longitudinal wiring may be located in the second metal layer M2.
Optionally, in another embodiment of the present invention, referring to fig. 16, fig. 16 is a schematic structural diagram of another display panel provided in an embodiment of the present invention, where the display panel further includes: a plurality of second wirings L4, a transition line L5, and at least one third wiring L6, wherein the number of the second wirings L4 is greater than the number of the third wirings L6.
The plurality of second wirings L4 extend in the first direction X, and a first end of the second wirings L4 is connected to the first portion L21 of the second signal line L2, a second end is connected to the transition line L5, the transition line L5 extends in the second direction Y, and the second direction Y intersects the first direction X.
At least one third wiring L6 is disposed around the second display region BB, and the third wiring L6 is connected to the transition line L5.
Specifically, as shown in fig. 16, the signals transmitted on the second signal lines L2 are led out through the plurality of second wires L4, so that the problem of voltage drop occurring when only one second wire L4 is led out can be avoided, and the stability of the signals transmitted on the second signal lines L2 to the second pixels 12 in the second display area BB is further improved, so that the light emitting performance of the second light emitting units 122 in the second pixels 12 is improved.
In fig. 16, four second wirings L4 and one third wiring L6 are illustrated as an example, where the third wiring L6 is located in the first display area AA and is only disposed around the boundary of the second display area BB and connected to the second pixel circuit 121, and in order to ensure the light transmittance of the second display area BB, the third wiring L6 may be electrically connected to the second light emitting unit 122 through some transparent wires L7, for example, the transparent wires L7 may be ITO wires.
Further, in the embodiment of the present invention, the second wiring L4, the transition line L5 and the third wiring L6 all pass through the area between the first pixels 11 in the first display area AA, so that the light emitting of the first light emitting unit 121 in the first display area AA is not affected.
In fig. 16, the first pixel circuit 111 and the first light emitting unit 112 are not illustrated, and only the first pixel 11 is illustrated.
Optionally, in another embodiment of the present invention, referring to fig. 17, fig. 17 is a schematic structural diagram of yet another display panel provided in an embodiment of the present invention, where the display panel includes a non-display area CC at least partially surrounding a second display area BB, and the second signal line L2 is located in the non-display area CC. It is understood that the non-display area CC is a frame area of the display panel.
The display panel includes a signal input terminal 10, the signal input terminal 10 being electrically connected to a first signal line L1; the non-display area CC includes a third side CC3 and a fourth side CC4 disposed opposite to each other in a third direction Z, where the third direction Z is parallel to a plane where the display panel is located, and the third direction Z is parallel to the second direction Y.
The second signal line L2 includes a second portion L22 and a third portion L23, one of the second portion L22 and the third portion L23 being located at a third side, the other being located at a fourth side.
Specifically, the non-display area CC includes a third side CC3 and a fourth side CC4, where the third side CC3 may be understood as a left side of the display panel and the fourth side may be understood as a right side of the display panel.
As shown in fig. 17, the second portion L22 is electrically connected to the second pixels 12 in the second display area BB through the fifth wiring L8, and the third portion L23 is electrically connected to the second pixels 12 in the second display area BB through the sixth wiring L9.
Alternatively, the first end of the fifth wiring L8 is connected to the second portion L22, and the second end may be disposed around the second display area BB; similarly, the first end of the sixth wiring L9 is connected to the third portion L23, and the second end is disposed around the second display area BB; as shown in fig. 17, the fifth wiring L8 and the sixth wiring L9 surround half of the second display area BB, respectively, and the second pixels 12 located in the second display area BB are connected to the fifth wiring L8 and the sixth wiring L9 through the transparent lead L7, and connection of the second pixels 12 to the second signal lines L2 is achieved while ensuring light transmittance of the second display area BB.
In fig. 17, only one fifth wiring L8 and one sixth wiring L9 are described as an example, and the number thereof may be plural.
Optionally, in another embodiment of the present invention, referring to fig. 18, fig. 18 is a schematic structural diagram of a display panel according to another embodiment of the present invention, where the display panel includes:
a first driving circuit 13, the first driving circuit 13 providing control signals to the first pixel circuit 111 and/or the second pixel circuit 121; the second signal line L2 is coupled to an input terminal of the first driving circuit 13.
Specifically, the first driving circuit 13 is located in the non-display area CC, and in fig. 18, the first driving circuit 13 is located on the third side CC3, and is illustrated as being connected to the second portion L22 of the second signal line L2, where the first driving circuit 13 may be a gate driving circuit in the display panel, for example, a light emission control circuit for controlling light emission of pixels, i.e., a commonly defined Emit circuit, for providing the first pixel circuit 111 and/or the second pixel circuit 121 with a required light emission control signal, i.e., the Emit signal shown in fig. 11 and 12, and the second signal line L2 is simultaneously coupled to an input terminal of the first driving circuit 13 and is connected to the second pixel 12 circuit in the second display area BB. In some alternative embodiments, the first driving circuit 13 may also be a scan (scan) circuit.
Optionally, referring to fig. 19, fig. 19 is a schematic structural diagram of a display panel according to another embodiment of the present invention, where the second signal line L2 includes a fourth portion L24 and a fifth portion L25, the fourth portion L24 is electrically connected to the second pixel 12, and the fifth portion L25 is electrically connected to the first driving circuit 13; the voltage stabilizing module 14 is included between the fourth section L24 and the fifth section L25.
Specifically, in order to avoid the influence of the signal transmitted on the second signal line L2 on the first driving circuit 13, the voltage stabilizing module 14 is disposed between the second pixel 12 and the first driving circuit 13 in the present application, so that the stability of the signal transmitted to the second pixel 12 is ensured, and the influence on the operation of the first driving circuit 13 is avoided, so as to integrally improve the display performance of the display panel.
Optionally, the voltage stabilizing module 14 includes a first resistor including an active layer material of a transistor in the first pixel circuit 111.
Optionally, referring to fig. 20, fig. 20 is a schematic diagram of a part of a circuit structure of an electrostatic protection circuit according to an embodiment of the present invention, the voltage stabilizing module 14 includes an electrostatic protection circuit, a fourth part L24 is electrically connected to an input terminal IN of the electrostatic protection circuit, and a fifth part L25 is electrically connected to an output terminal of the electrostatic protection circuit.
It should be noted that, the first resistor and the electrostatic protection circuit may be disposed between the fourth portion L24 and the fifth portion L25, or only one of them may be disposed separately, so that stability of the signal transmitted to the second pixel 12 is only required to be ensured, and an influence on the operation of the first driving circuit 13 is avoided.
Alternatively, based on all the above embodiments of the present invention, a display device is further provided in another embodiment of the present invention, and referring to fig. 21, fig. 21 is a schematic structural diagram of a display device provided in the present invention.
The display device 100 includes the display panel according to the above embodiments of the present application.
The display device 100 includes, but is not limited to, a display device such as a mobile phone or a tablet, and has at least the same technical effects as a display panel.
The display panel and the display device provided by the invention are described in detail, and specific examples are applied to illustrate the principle and the implementation of the invention, and the description of the above examples is only used for helping to understand the method and the core idea of the invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
It should be noted that, in the description of the present application, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present application. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
It is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in an article or apparatus that comprises such element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (18)
1. A display panel is characterized by comprising a first display area and a second display area,
a first pixel located in the first display region, the first pixel including a first pixel circuit and a first light emitting unit;
a second pixel located in the second display region, the second pixel including a second pixel circuit and a second light emitting unit;
a first signal line for transmitting a first signal to a first input terminal of the first pixel circuit;
wherein the cathode of the second light emitting unit is electrically connected with the first signal line;
the voltage of the first signal is V1, the cathode of the first light-emitting unit is connected with a first power supply signal, the voltage of the first power supply signal is V2, the anode of the first light-emitting unit is coupled with a second power supply signal, the voltage of the second power supply signal is V5, the anode of the second light-emitting unit is coupled with a third power supply signal, and the voltage of the third power supply signal is V6;
wherein I V6-V1I > V5-V2I.
2. The display panel of claim 1, wherein the display panel comprises,
the first signal line is coupled with the anode of the first light emitting unit; and/or, the first signal line is coupled with a gate of a first driving transistor of the first pixel circuit.
3. The display panel of claim 2, further comprising:
a first power signal line electrically connected to a cathode of the first light emitting unit;
the voltage of the first signal is V1; the first power supply signal line is used for transmitting a first power supply signal, and the voltage of the first power supply signal is V2;
wherein V1 is less than V2, and I V2-V1I is not less than 0.5V.
4. The display panel of claim 1, further comprising:
a second signal line for transmitting a second signal;
the second signal line is coupled to a gate of a second driving transistor of the second pixel circuit, and the second signal line is coupled to an anode of the second light emitting unit.
5. The display panel of claim 4, wherein the voltage of the first signal is V1 and the voltage of the second signal is V3;
wherein V3 is less than V1, and I V3-V1I is not less than 1V.
6. The display panel of claim 4, comprising a non-display region at least partially surrounding the second display region, the second signal line being located in the non-display region;
the display panel includes a signal input terminal electrically connected to the first signal line; the non-display area comprises a first side and a second side which are oppositely arranged in a first direction, the distance between the second side and the signal input terminal is larger than that between the first side and the signal input terminal, and the first direction is parallel to the plane of the display panel;
the second display area is located between the first side and the second side along the first direction, and the second signal line includes a first portion located at the first side or the first portion located at the second side.
7. The display panel according to claim 6, wherein a first portion of the second signal line is electrically connected to the second pixel through a first wiring, the first wiring extending in the first direction, the first signal line being located in a different conductive layer from the first wiring.
8. The display panel of claim 6, further comprising: a plurality of second wirings, transition lines, and at least one third wiring;
a plurality of the second wirings extend in the first direction, a first end of the second wirings is connected with the second signal line, a second end is connected with the transition line, the transition line extends in a second direction, and the second direction intersects with the first direction;
at least one of the third wirings is disposed around the second display region, and the third wiring is connected with the transition line.
9. The display panel of claim 4, comprising a non-display region at least partially surrounding the second display region, the second signal line being located in the non-display region;
the display panel includes a signal input terminal electrically connected to the first signal line; the non-display area comprises a third side and a fourth side which are oppositely arranged in a third direction, and the third direction is parallel to the plane of the display panel;
the second signal line includes a second portion and a third portion, one of the second portion and the third portion being located at the third side, the other being located at the fourth side.
10. The display panel of claim 4, comprising:
a first drive circuit that provides a control signal for the first pixel circuit and/or the second pixel circuit; the second signal line is coupled to an input terminal of the first driving circuit.
11. The display panel of claim 10, wherein the display panel comprises,
the second signal line includes a fourth portion electrically connected to the second pixel and a fifth portion electrically connected to the first driving circuit; a voltage stabilizing module is arranged between the fourth part and the fifth part.
12. The display panel of claim 11, wherein the voltage regulator module comprises a first resistor comprising an active layer material of a transistor in the first pixel circuit.
13. The display panel of claim 11, wherein the voltage stabilizing module comprises an electrostatic protection circuit, the fourth portion is electrically connected to an input of the electrostatic protection circuit, and the fifth portion is electrically connected to an output of the electrostatic protection circuit.
14. The display panel of claim 1, further comprising:
a third signal line for transmitting a third signal;
the first signal line is coupled to the anode of the first light emitting unit, the third signal line is coupled to the gate of the first driving transistor of the first pixel circuit, and the third signal line is coupled to the gate of the second driving transistor of the second pixel circuit.
15. The display panel of claim 14, wherein the voltage of the first signal is V1 and the voltage of the third signal is V4, wherein V1 > V4.
16. The display panel of claim 1, wherein an anode of the first light emitting unit is coupled to a second power signal line, and an anode of the second light emitting unit is coupled to the second power signal line.
17. The display panel of claim 1, wherein the first display region at least partially surrounds the second display region, and wherein the second display region has a light transmittance that is greater than a light transmittance of the first display region.
18. A display device comprising a display panel according to any one of claims 1-17.
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| KR101870925B1 (en) * | 2011-06-30 | 2018-06-26 | 삼성디스플레이 주식회사 | Pixel and Organic Light Emitting Display Device Using the same |
| KR102640245B1 (en) * | 2016-12-30 | 2024-02-26 | 엘지디스플레이 주식회사 | Method for compensating data of the Organic light emitting diode display device |
| KR102551915B1 (en) * | 2017-12-28 | 2023-07-05 | 엘지디스플레이 주식회사 | White organic light emitting diode backlight apparatus and liquid crystal display device using the same |
| KR20200066500A (en) * | 2018-11-30 | 2020-06-10 | 삼성디스플레이 주식회사 | Display device |
| CN209374036U (en) * | 2019-02-15 | 2019-09-10 | 上海和辉光电有限公司 | A kind of display panel and display device |
| KR102629520B1 (en) * | 2019-07-25 | 2024-01-25 | 엘지디스플레이 주식회사 | Display device |
| US11735109B2 (en) * | 2020-10-19 | 2023-08-22 | Lg Display Co., Ltd. | Display panel and display device using the same |
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| CN113409727B (en) * | 2021-05-19 | 2023-01-31 | Oppo广东移动通信有限公司 | Pixel driving circuit, display panel, control method of display panel and display device |
| CN113436581B (en) * | 2021-06-23 | 2022-11-08 | 京东方科技集团股份有限公司 | Pixel driving circuit, driving method and display panel |
| CN114242000B (en) * | 2021-12-17 | 2023-03-31 | 武汉天马微电子有限公司 | Display panel, driving method thereof and display device |
| CN114283719B (en) * | 2021-12-31 | 2023-07-14 | 湖北长江新型显示产业创新中心有限公司 | Switch control circuit, driving method thereof and display device |
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