CN114758620B - Display module, driving method thereof and display device - Google Patents

Display module, driving method thereof and display device Download PDF

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Publication number
CN114758620B
CN114758620B CN202210444658.6A CN202210444658A CN114758620B CN 114758620 B CN114758620 B CN 114758620B CN 202210444658 A CN202210444658 A CN 202210444658A CN 114758620 B CN114758620 B CN 114758620B
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sub
electrically connected
display area
signal line
display
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CN114758620A (en
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李军
余志华
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Wuhan Tianma Microelectronics Co Ltd
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Wuhan Tianma Microelectronics Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • 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
    • G09G2300/0439—Pixel structures
    • G09G2300/0443—Pixel structures with several sub-pixels for the same colour in a pixel, not specifically used to display gradations
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

Abstract

The embodiment of the application provides a display module, a driving method thereof and a display device, wherein the display module comprises a display panel and a first driving module, the display panel comprises a first display area and a second display area, and the first driving module is electrically connected with a plurality of sub-pixels in the first display area; in the first mode, the second display area is in a screen-off state, and the first driving module provides voltage signals for at least part of the sub-pixels in the first display area so as to enable the at least part of the sub-pixels in the first display area to emit light. According to the embodiment of the application, the power consumption of the display module can be reduced.

Description

Display module, driving method thereof and display device
Technical Field
The application belongs to the technical field of display, and particularly relates to a display module, a driving method thereof and a display device.
Background
In the process of continuously pursuing the large screen ratio of the terminal, a concept of 'full screen' is proposed. The full screen is interpreted literally that the front face of the display screen is the screen, and the four border positions of the display screen are all designed in a borderless mode, so that the screen duty ratio is close to 100%. However, the technology is limited in practice, and the display screen with the ultra-high screen ratio is temporarily only, and the front screen ratio of the display screen cannot be 100%. Therefore, the full-screen display device is a display device with a super-narrow frame design, wherein the screen ratio of the full-screen display device can reach more than 90%.
The inventor researches of the application find that the current comprehensive screen has the problem of larger power consumption when prompting the user to receive unread messages or missed calls.
Disclosure of Invention
The embodiment of the application provides a display module, a driving method thereof and a display device, and can reduce the power consumption of the display module.
In a first aspect, an embodiment of the present application provides a display module, where the display module includes a display panel and a first driving module, the display panel includes a first display area and a second display area, and the first driving module is electrically connected to a plurality of sub-pixels in the first display area; in the first mode, the second display area is in a screen-off state, and the first driving module provides voltage signals for at least part of the sub-pixels in the first display area so as to enable the at least part of the sub-pixels in the first display area to emit light.
In a second aspect, an embodiment of the present application provides a driving method of a display module, where the display module includes a display panel and a first driving module, the display panel includes a first display area and a second display area, the first driving module is electrically connected to a plurality of sub-pixels in the first display area, and in a first mode, the second display area is in a screen-off state; the driving method is applied to the first driving module and comprises the following steps: in the first mode, a voltage signal is provided to at least some of the subpixels in the first display area to cause at least some of the subpixels in the first display area to emit light.
In a third aspect, an embodiment of the present application provides a display device, including a display module provided in the first aspect.
The display module comprises a display panel and a first driving module, wherein the display panel comprises a first display area and a second display area, and the first driving module is electrically connected with a plurality of sub-pixels in the first display area; in the first mode, the second display area is in a screen-off state, and the first driving module provides voltage signals for at least part of the sub-pixels in the first display area so as to enable the at least part of the sub-pixels in the first display area to emit light. On the one hand, the first display area in the display panel serves as a breathing lamp, so that an LED lamp is not required to be additionally arranged on the display panel, and the problem that the whole screen has no breathing lamp can be solved; on the other hand, in the first mode, since only at least part of the sub-pixels in the first display area emit light and the second display area does not emit light, power consumption of the display panel can be reduced; in yet another aspect, in the first mode, the first driving module provides the voltage signal only to at least some of the sub-pixels in the first display area, and does not need to provide the voltage signal to the sub-pixels in the second display area, so that the power consumption of the driving module (including the first driving module) can be reduced as a whole.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described, and it is possible for a person skilled in the art to obtain other drawings according to these drawings without inventive effort.
FIG. 1 is a schematic view of a full screen display of the related art;
FIG. 2 is a schematic view of another display of a full screen of the related art;
fig. 3 is a schematic structural diagram of a display module according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a display module according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a display module according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a display module according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a display module according to an embodiment of the present disclosure;
fig. 8 is a schematic circuit diagram of a display module according to an embodiment of the disclosure;
fig. 9 is a schematic circuit diagram of a display module according to an embodiment of the disclosure;
FIG. 10 is a timing diagram of the pixel circuit in the display module shown in FIG. 9;
fig. 11 is a schematic top view of a display module according to an embodiment of the disclosure;
Fig. 12 is another schematic top view of a display module according to an embodiment of the disclosure;
fig. 13 is a schematic top view of a display module according to an embodiment of the disclosure;
fig. 14 is a schematic top view of a display module according to an embodiment of the disclosure;
fig. 15 is a schematic flow chart of a driving method of a display module according to an embodiment of the present application;
FIG. 16 is a timing diagram of the pixel circuit in the display module shown in FIG. 8;
FIG. 17 is a timing diagram of the pixel circuit in the display module shown in FIG. 8;
FIG. 18 is a timing diagram of the pixel circuit in the display module shown in FIG. 8;
FIG. 19 is a timing diagram of the pixel circuit in the display module shown in FIG. 8;
fig. 20 is a schematic structural diagram of a display device according to an embodiment of the present application.
Detailed Description
Features and exemplary embodiments of various aspects of the present application are described in detail below to make the objects, technical solutions and advantages of the present application more apparent, and to further describe the present application in conjunction with the accompanying drawings and the detailed embodiments. It should be understood that the specific embodiments described herein are intended to be illustrative of the application and are not intended to be limiting. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by showing examples of the present application.
It is 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 a process, method, 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 process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
The transistors in the embodiments of the present application are described by taking P-type transistors as examples, but the transistors are not limited to P-type transistors, and may be replaced by N-type transistors. For an N-type transistor, the on level is high and the off level is low. That is, the gate of the N-type transistor is on between the first and second poles when the gate is high, and is off between the first and second poles when the gate is low. For a P-type transistor, the on level is low and the off level is high. That is, when the control of the P-type transistor is at a very low level, the first pole and the second pole are turned on, and when the control of the P-type transistor is at a high level, the first pole and the second pole are turned off. In a specific implementation, the gate of each transistor is used as a control electrode, and the first electrode of each transistor may be used as a source electrode, the second electrode may be used as a drain electrode, or the first electrode may be used as a drain electrode, and the second electrode may be used as a source electrode, which is not distinguished herein.
In the embodiments herein, the term "electrically connected" may refer to two components being directly electrically connected, or may refer to two components being electrically connected via one or more other components.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Accordingly, this application is intended to cover such modifications and variations of this application as fall within the scope of the appended claims (the claims) and their equivalents. The embodiments provided in the examples of the present application may be combined with each other without contradiction.
Before describing the technical solution provided by the embodiments of the present application, in order to facilitate understanding of the embodiments of the present application, the present application first specifically describes a problem existing in the prior art:
as described above, the full screen is literally interpreted as that the front of the display screen is all the screen, and the four border positions of the display screen are all in borderless design, so as to pursue a screen duty ratio close to 100%. For the non-comprehensive screen, because the requirement of the non-comprehensive screen on the screen duty ratio is relatively low, a certain space can be reserved on the screen to set the LED lamp, and the LED lamp is used as a breathing lamp. For example, when the electronic device receives a message, it may be prompted by a "breath light" on a non-comprehensive screen that a message is entered.
However, for the full-face screen, since the screen ratio of the full-face screen is approximately 100%, almost all the front face of the display screen is the screen, and there is no extra space to set an LED lamp as a "breathing lamp". Thus, as shown in FIG. 1, when the electronic device receives a message, the entire screen of the full screen will be lit. Alternatively, as shown in FIG. 2, when the electronic device receives a message, the perimeter of the screen may light up. In either the mode shown In fig. 1 or the mode shown In fig. 2, when the electronic device receives the message, the driving chip needs to enter a Display (Display) mode from a Sleep (Sleep In) mode, and the functions of the driving chip are fully opened, so that the power consumption of the driving chip is increased; in addition, the scanning driving circuit and the data driving circuit on the display panel are required to work normally, the power consumption of the display panel is increased, and the service life of the display panel is also reduced.
In view of the above-mentioned research of the inventor, the embodiment of the application provides a display module, a driving method thereof and a display device, which can solve the technical problems of large power consumption and low service life of the display module (such as a full screen) existing in the related technology.
The technical conception of the embodiment of the application is as follows: and when the first mode is adopted, the second display area of the display panel is in a screen-off state, and the first driving module provides voltage signals for at least part of sub-pixels in the first display area so as to enable at least part of the sub-pixels in the first display area to emit light. On the one hand, the first display area in the display panel serves as a breathing lamp, so that an LED lamp is not required to be additionally arranged on the display panel, and the problem that the whole screen has no breathing lamp can be solved; on the other hand, in the first mode, since only at least part of the sub-pixels in the first display area emit light and the second display area does not emit light, power consumption of the display panel can be reduced; in yet another aspect, in the first mode, the first driving module provides the voltage signal only to at least some of the sub-pixels in the first display area, and does not need to provide the voltage signal to the sub-pixels in the second display area, so that the power consumption of the driving module (including the first driving module) can be reduced as a whole.
The following first describes a display module provided in an embodiment of the present application.
Fig. 3 is a schematic structural diagram of a display module according to an embodiment of the present application. As shown in fig. 3, the display module 30 provided in the embodiment of the present application includes a display panel 01 and a first driving module 02, where the display panel 01 includes a first display area A1 and a second display area A2. The first display area A1 and the second display area A2 may each be provided with sub-pixels, and the area of the second display area A2 may be larger than that of the first display area A1. The second display area A2 can be understood as a normal display area. In the embodiment of the present application, the first driving module 02 is electrically connected to a plurality of sub-pixels PX in the first display area A1.
In the first mode, the second display area A2 is in the off-screen state, and the first driving module 02 provides a voltage signal to at least some of the sub-pixels PX in the first display area A1 to make at least some of the sub-pixels in the first display area A1 emit light. The first mode may also be referred to as a screen-off display (Always On Display, AOD) mode, that is, when in the first mode, only the first display area A1 is displayed in the display panel 01, and the second display area A2 is not displayed.
The display module comprises a display panel and a first driving module, wherein the display panel comprises a first display area and a second display area, and the first driving module is electrically connected with a plurality of sub-pixels in the first display area; in the first mode, the second display area is in a screen-off state, and the first driving module provides voltage signals for at least part of the sub-pixels in the first display area so as to enable the at least part of the sub-pixels in the first display area to emit light. On the one hand, the first display area in the display panel serves as a breathing lamp, so that an LED lamp is not required to be additionally arranged on the display panel, and the problem that the whole screen has no breathing lamp can be solved; on the other hand, in the first mode, since only at least part of the sub-pixels in the first display area emit light and the second display area does not emit light, power consumption of the display panel can be reduced; in yet another aspect, in the first mode, the first driving module provides the voltage signal only to at least some of the sub-pixels in the first display area, and does not need to provide the voltage signal to the sub-pixels in the second display area, so that the power consumption of the driving module (including the first driving module) can be reduced as a whole.
The following describes the circuit structure of the display module according to the embodiments of the present application in detail in conjunction with some specific embodiments of the present application.
Fig. 4 is a schematic structural diagram of a display module according to an embodiment of the present application. As shown in fig. 4, in some specific embodiments, the display panel 01 may include a scan signal line S and a data signal line data, and the first driving module 02 may include a scan signal output terminal S out And a data signal output terminal data out . The scanning signal lines S are respectively connected with the scanning signal output terminals S out The sub-pixels PX in the first display area A1 are electrically connected for transmitting scanning signals to the sub-pixels PX in the first display area A1. The data signal line data and the data signal output terminal data respectively out The sub-pixels PX in the first display area A1 are electrically connected for transmitting data signals to the sub-pixels PX in the first display area A1. The sub-pixel PX may include a pixel circuit including a transistor that may be turned on under control of a scan signal to transmit a data signal to the light emitting element through the turned-on transistor, thereby causing the light emitting element in the sub-pixel PX to emit light.
Accordingly, in the first mode, the scan signal output terminal S out The scan signal may be supplied to the sub-pixels PX in the first display region A1 through the scan signal line S, and the data signal output terminal data out By dataThe signal line data supplies a data signal to the sub-pixels PX in the first display region A1 to cause at least part of the sub-pixels in the first display region A1 to emit light.
With continued reference to fig. 4, a plurality of sub-pixels PX in the first display region A1 may be optionally electrically connected with the same scanning signal line S according to some embodiments of the present application. That is, one scan signal line S may transmit a scan signal to all the sub-pixels PX in the first display region A1 while turning on the transistors in all the sub-pixels PX in the first display region A1. For example, the sub-pixels PX in the first display region A1 may include a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B. All of the red, green and blue sub-pixels R, G and B in the first display area A1 may be electrically connected to the same scan signal line S, and the scan signal transmitted through one scan signal line S simultaneously turns on the transistors in the red, green and blue sub-pixels R, G and B in the first display area A1.
Therefore, on one hand, the number of scanning signal lines and the wiring length in the display panel can be reduced, wiring space is saved, and production cost is saved; on the other hand, the scan signal output terminals S on the first driving module can be reduced out Reduces the cost of use of the first drive module.
Fig. 5 is a schematic structural diagram of a display module according to an embodiment of the present application. As shown in fig. 5, unlike the embodiment shown in fig. 4, the scan signal lines S may alternatively include M sub-scan signal lines S according to other embodiments of the present application 1 ～S M Scan signal output terminal S out May include M sub-scanning signal output terminals S out1 ～S outM M sub-scanning signal lines S 1 ～S M And M sub-scanning signal output terminals S out1 ～S outM And the M is larger than 1 and is an integer. The first display area A1 may include M color sub-pixels PX, M color sub-pixels PX and M sub-scan signal lines S 1 ～S M The sub-pixels of the same color in the first display area A1 are electrically connected with the same sub-scanning signal line in a one-to-one correspondence,the sub-pixels of different colors in the first display area A1 are electrically connected to different sub-scanning signal lines.
For example, the sub-pixels PX in the first display region A1 may include a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B. All red sub-pixels R and sub-scanning signal lines S in the first display area A1 1 Electrically connected with all the green sub-pixels G and the sub-scanning signal lines S in the first display area A1 2 Electrically connected with all the blue sub-pixels B and the sub-scanning signal lines S in the first display area A1 3 And (5) electric connection. Through a sub-scanning signal line S 1 The transmitted scan signal may simultaneously turn on the transistors in all red subpixels R in the first display area A1. Through a sub-scanning signal line S 2 The transmitted scan signal may simultaneously turn on the transistors in all green subpixels G in the first display area A1. Through a sub-scanning signal line S 3 The transmitted scan signal may simultaneously turn on the transistors in all of the blue subpixels B in the first display area A1.
In this way, since the RGB sub-pixels with different colors in the first display area A1 are electrically connected to the different sub-scan signal lines, when the first display area A1 displays a red image, only the red sub-pixel R needs to be provided with the scan signal, and the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B do not need to be provided with the scan signal, so that the power consumption of the first driving module and the scan driving circuit in the display panel is further reduced.
With continued reference to fig. 4, a plurality of subpixels PX in the first display region A1 may optionally be electrically connected with the same data signal line data according to some embodiments of the present application. That is, one data signal line data may transmit a data signal to all the sub-pixels PX in the first display region A1, so that all the sub-pixels PX in the first display region A1 emit light at the same time. For example, the sub-pixels PX in the first display region A1 may include a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B. All of the red, green, and blue sub-pixels R, G, and B in the first display area A1 may be electrically connected to the same data signal line data, and the data signal transmitted through one data signal line data simultaneously lights the light emitting elements in the red, green, and blue sub-pixels R, G, and B in the first display area A1.
When receiving unread message or missed call, the display module enters into the first mode. In the first mode, the user can be prompted to have unread messages or missed calls only by the first display area A1 emitting light. Therefore, in the first mode, the red, green, and blue sub-pixels R, G, and B may input the same data voltage as long as the red, green, and blue sub-pixels R, G, and B are ensured to emit light.
Therefore, on one hand, the number of the data signal lines and the wiring length in the display panel can be reduced, the wiring space is saved, and the production cost is saved; on the other hand, the data signal output terminal data on the first driving module can be reduced out Reduces the cost of use of the first drive module.
Fig. 6 is a schematic structural diagram of a display module according to an embodiment of the present application. As shown in FIG. 6, unlike the embodiment shown in FIG. 4, the data signal line data may alternatively include N sub-data signal lines data in accordance with other embodiments of the present application 1 ～data N Data signal output terminal data out Can include N sub data signal output terminals data out1 ～data outN N sub data signal lines data 1 ～data N And N sub data signal output terminals data out1 ～data outN And the electric connection is in one-to-one correspondence, and N is larger than 1 and is an integer. The first display area A1 can comprise N color sub-pixels, N color sub-pixels and N sub-data signal lines 1 ～data N The sub-pixels of the same color in the first display area A1 are electrically connected with the same sub-data signal line, the sub-pixels of different colors in the first display area A1 are electrically connected with different sub-data signal lines,
for example, the sub-pixels PX in the first display region A1 may include a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B. All red subpixels R in the first display area A1 can be connected with the subpixel data signal line data 1 Electrically connect, firstAll of the green subpixels G in display area A1 can be connected to subpixel data signal line 2 Electrically connected, all of the blue subpixels B in the first display area A1 can be connected with the subpixel data line data 3 And (5) electric connection. Through a sub data signal line data 1 The transmitted data signal may simultaneously light the light emitting elements in all red subpixels R in the first display area A1. Through a sub data signal line data 2 The transmitted data signal may simultaneously turn on the light emitting elements in all green sub-pixels G in the first display area A1. Through a sub data signal line data 1 The transmitted data signal may simultaneously light the light emitting elements in all the blue subpixels B in the first display area A1. With sub-data signal lines data 1 For example, the sub data signal line data is in a first direction (e.g., column direction) 1 May be electrically connected to a plurality of red subpixels R arranged in the first direction.
In this way, on one hand, compared with the scheme that N rows of sub-pixels in the related art require N sub-data signal lines, in the embodiment of the present application, the sub-pixels of the same color are electrically connected to the same sub-data signal line, so that the number of sub-data signal lines can be greatly reduced, which is beneficial to saving the wiring space and the production cost, and simultaneously, the data signal output terminal data on the first driving module can be reduced out Reducing the cost of use of the first drive module; on the other hand, since the RGB sub-pixels with different colors in the first display area A1 are electrically connected to different sub-data signal lines, when the first display area A1 displays a red screen, only the red sub-pixel R needs to be provided with a data signal, and the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B do not need to be provided with a data signal, so that the power consumption of the first driving module and the data driving circuit in the display panel is further reduced.
Fig. 7 is a schematic structural diagram of a display module according to an embodiment of the present application. As shown in fig. 7, the display panel 01 may further include a first power supply voltage signal line PVDD and a second power supply voltage signal line PVEE. Wherein the first power supply voltage signal line PVDD can be used for transmitting positive voltage signals, and the second power supply voltage signal line PVEE is used for transmitting negative voltage signalsNumber (x). Accordingly, the first driving module 02 may further include a first power supply voltage signal output terminal PVDD out And a second power supply voltage signal output terminal PVEE out . First power supply voltage signal line PVDD and first power supply voltage signal output terminal PVDD out Electrically connected with the second power voltage signal line PVEE and the second power voltage signal output terminal PVEE out And (5) electric connection.
In the embodiment shown in fig. 7, a plurality of sub-pixels PX in the first display region A1 may be electrically connected to the same first power voltage signal line PVDD. That is, one first power voltage signal line PVDD may supply a forward voltage signal to all the sub-pixels PX in the first display region A1. And/or, the plurality of sub-pixels PX in the first display region A1 are electrically connected to the same second power voltage signal line PVEE. That is, one second power voltage signal line PVEE may provide a negative voltage signal to all the sub-pixels PX in the first display region A1.
Therefore, on one hand, the number and the wiring length of the first power supply voltage signal lines PVDD and/or the second power supply voltage signal lines PVEE in the display panel can be reduced, so that the wiring space is saved, and the production cost is saved; on the other hand, the first power supply voltage signal output terminal PVDD on the first driving module can be reduced out And/or a second power supply voltage signal output terminal PVEE out Reduces the cost of use of the first drive module.
For ease of understanding, the circuit structure of the display module of the embodiment of the present application will be described in detail below with reference to the 2T1C pixel circuit and the 7T1C pixel circuit.
Fig. 8 is a schematic circuit diagram of a display module according to an embodiment of the disclosure. As shown in fig. 8, optionally, the sub-pixels PX in the first display region A1 may include a pixel circuit 80 and a light emitting element 81 according to some embodiments of the present application. Taking the 2T1C pixel circuit as an example, the pixel circuit 80 may include a driving transistor M1, a data writing transistor M2, and a storage capacitor Cst. A first electrode of the driving transistor M1 is electrically connected to the first power supply voltage signal line PVDD, and a second electrode of the driving transistor M1 is electrically connected to the first electrode of the light emitting element 81. The gate of the data writing transistor M2 is electrically connected to the scanning signal line S, the first pole of the data writing transistor M2 is electrically connected to the data signal line data, and the second pole of the data writing transistor M2 is electrically connected to the gate of the driving transistor M1. The first electrode of the storage capacitor Cst is electrically connected to the gate of the driving transistor M1, and the second electrode of the storage capacitor Cst is electrically connected to the first power voltage signal line PVDD. The second electrode of the light emitting element 81 is electrically connected to the second power supply voltage signal line PVEE. The first electrode of the light emitting element 81 may be an anode, and the second electrode of the light emitting element 81 may be a cathode. The light emitting element 81 includes, but is not limited to, an organic light emitting diode OLED.
The sub-pixels PX in the first display region A1 may include red, green, and blue sub-pixels R, G, and B. All the sub-pixels PX (including red, green, and blue sub-pixels R, G, and B) in the first display area A1 may be electrically connected to the same first power voltage signal line PVDD, which may be connected to the first power voltage signal output terminal PVDD on the first driving module 02 out And (5) electric connection. All the sub-pixels PX in the first display area A1 can be electrically connected with the same second power voltage signal line PVEE, which can be connected with the second power voltage signal output terminal PVEE on the first driving module 02 out And (5) electric connection. All the sub-pixels PX in the first display area A1 may be electrically connected to the same scanning signal line S, which may be connected to the scanning signal output terminal S of the first driving module 02 out And (5) electric connection. All red subpixels R in the first display area A1 can be connected with the subpixel data signal line data 1 Electrically connected to the sub data signal line data 1 Can be connected with the sub data signal output terminal data of the first driving module 02 out1 And (5) electric connection. All of the green subpixels G in the first display area A1 may be connected to the subpixel data signal line data 2 Electrically connected to the sub data signal line data 2 Can be connected with the sub data signal output terminal data of the first driving module 02 out2 And (5) electric connection. All of the blue subpixels B in the first display area A1 may be connected to the subpixel data signal line data 3 Electrically connected to the sub data signal line data 3 Can be combined withSub data signal output terminal data on first driving module 02 out3 And (5) electric connection.
In the first mode, the first power supply voltage signal output terminal PVDD out Providing a forward voltage signal, such as a +4.6V voltage signal; second power supply voltage signal output terminal PVEE out A negative going voltage signal, such as a-2.7V voltage signal, is provided. Scanning signal output terminal S out Providing an on level (e.g., low level), a sub data signal output terminal data out1 ～data out3 Provides an on level (e.g., low level). The data write transistor M2 is responsive to the scan signal output terminal S out The sub data signal output terminal data is turned on by the supplied turn-on level out1 ～data out3 At least one of which provides a conduction level transmitted to the gate of the driving transistor M1 through the data writing transistor M2, the driving transistor M1 being turned on. First power supply voltage signal output terminal PVDD out The supplied forward voltage signal is transmitted to the light emitting element 81 through the first power voltage signal line PVDD and the driving transistor M1, so that at least one of the red, green, and blue sub-pixels R, G, and B in the first display area A1 emits light.
Fig. 9 is a schematic circuit diagram of a display module according to an embodiment of the disclosure. As shown in fig. 9, the display panel 01 may further include a light emission control signal line EM and a reference voltage signal line vref, optionally taking a 7T1C pixel circuit as an example, according to some embodiments of the present application. Accordingly, the first driving module 02 may further include a light emission control signal output terminal EM out And a reference voltage signal output terminal vref out . Light emission control signal line EM and light emission control signal output terminal EM out And the electric connection is used for transmitting the light-emitting control signal. Reference voltage signal line vref and reference voltage signal output terminal vref out And the electric connection is used for transmitting a reference voltage signal. The scan signal line S may further include a first scan signal line S1 and a second scan signal line S2, a scan signal output terminal S out May include a first scan signal output terminal S1 out And a second scan signal output terminal S2 out . First scanning letterNumber line S1 and first scan signal output terminal S1 out Electrically connected with the second scanning signal line S2 and the second scanning signal output terminal S2 out And (5) electric connection.
In the embodiment shown in fig. 9, a plurality of sub-pixels PX in the first display region A1 may be electrically connected to the same emission control signal line EM. And/or, the plurality of sub-pixels PX in the first display region A1 are electrically connected to the same reference voltage signal line vref.
Similarly, a plurality of sub-pixels PX in the first display region A1 are electrically connected to the same first scanning signal line S1. And/or, a plurality of sub-pixels PX in the first display region A1 are electrically connected to the same second scanning signal line S2.
For example, the sub-pixels PX in the first display region A1 may include a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B. All the sub-pixels PX (including the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B) in the first display area A1 may be electrically connected to the same emission control signal line EM, which may be connected to the emission control signal output terminal EM on the first driving module 02 out And (5) electric connection. All the sub-pixels PX in the first display area A1 are electrically connected to the same reference voltage signal line vref, which may be connected to the reference voltage signal output terminal vref of the first driving module 02 out And (5) electric connection. All the sub-pixels PX in the first display area A1 are electrically connected with the same first scanning signal line S1, and the first scanning signal line S1 can be connected with the first scanning signal output terminal S1 of the first driving module 02 out And (5) electric connection. All the sub-pixels PX in the first display area A1 are electrically connected with the same second scanning signal line S2, and the second scanning signal line S2 can be connected with the second scanning signal output terminal S2 of the first driving module 02 out And (5) electric connection.
In this way, on one hand, the number and the wiring length of the light emitting control signal line EM, the reference voltage signal line vref, the first scanning signal line S1 and/or the second scanning signal line S2 in the display panel can be reduced, which is beneficial to saving the wiring space and the production cost; on the other hand, the light-emitting control signal on the first driving module can be reducedNumber output terminal EM out Reference voltage signal output terminal vref out First scanning signal output terminal S1 out And/or a second scanning signal output terminal S2 out Reduces the cost of use of the first drive module.
With continued reference to fig. 9, specifically, the sub-pixel PX in the first display region A1 may include a pixel circuit 80 and a light emitting element 81. Taking a 7T1C pixel circuit as an example, the pixel circuit 80 may include a driving transistor M1, a data writing transistor M2, a first reset transistor M3, a threshold compensation transistor M4, a second reset transistor M5, a first light emission control transistor M6, a second light emission control transistor M7, and a storage capacitor Cst.
A first electrode of the driving transistor M1 is electrically connected to the first power supply voltage signal line PVDD, and a second electrode of the driving transistor M1 is electrically connected to the first electrode of the light emitting element 81.
The gate of the first reset transistor M3 is electrically connected to the first scan signal line S1, the first pole of the first reset transistor M3 is electrically connected to the reference voltage signal line vref, and the second pole of the first reset transistor M3 is electrically connected to the gate of the driving transistor M1.
The gate of the data writing transistor M2 is electrically connected to the second scanning signal line S2, the first pole of the data writing transistor M2 is electrically connected to the data signal line data, and the second pole of the data writing transistor M2 is electrically connected to the first pole of the driving transistor M1.
The gate of the threshold compensation transistor M4 is electrically connected to the second scan signal line S2, the first pole of the threshold compensation transistor M4 is electrically connected to the gate of the driving transistor M1, and the second pole of the threshold compensation transistor M4 is electrically connected to the first pole of the driving transistor M1.
The gate of the second reset transistor M5 is electrically connected to the first scan signal line S1, the first electrode of the second reset transistor M5 is electrically connected to the reference voltage signal line vref, and the second electrode of the second reset transistor M5 is electrically connected to the first electrode of the light emitting element 81.
The gate of the first light emission control transistor M6 is electrically connected to the light emission control signal line EM, the first pole of the first light emission control transistor M6 is electrically connected to the first power supply voltage signal line PVDD, and the second pole of the first light emission control transistor M6 is electrically connected to the first pole of the driving transistor M1.
The gate of the second emission control transistor M7 is electrically connected to the emission control signal line EM, the first electrode of the second emission control transistor M7 is electrically connected to the second electrode of the driving transistor M1, and the second electrode of the second emission control transistor M7 is electrically connected to the first electrode of the light emitting element 81.
The first electrode of the storage capacitor Cst is electrically connected to the gate of the driving transistor M1, and the second electrode of the storage capacitor Cst is electrically connected to the first power voltage signal line PVDD. The second electrode of the light emitting element 81 is electrically connected to the second power supply voltage signal line PVEE.
In addition to the above-mentioned emission control signal line EM, reference voltage signal line vref, first scan signal line S1, and second scan signal line S2, all the sub-pixels PX (including red, green, and blue sub-pixels R, G, and B) in the first display region A1 may be electrically connected to the same first power voltage signal line PVDD, which may be connected to the first power voltage signal output terminal PVDD on the first driving module 02 out And (5) electric connection. All the sub-pixels PX in the first display area A1 can be electrically connected with the same second power voltage signal line PVEE, which can be connected with the second power voltage signal output terminal PVEE on the first driving module 02 out And (5) electric connection. All red subpixels R in the first display area A1 can be connected with the subpixel data signal line data 1 Electrically connected to the sub data signal line data 1 Can be connected with the sub data signal output terminal data of the first driving module 02 out1 And (5) electric connection. All of the green subpixels G in the first display area A1 may be connected to the subpixel data signal line data 2 Electrically connected to the sub data signal line data 2 Can be connected with the sub data signal output terminal data of the first driving module 02 out2 And (5) electric connection. All of the blue subpixels B in the first display area A1 may be connected to the subpixel data signal line data 3 Electrically connected to the sub data signal line data 3 Can be connected with the sub data signal output terminal data of the first driving module 02 out3 And (5) electric connection.
Fig. 10 is a timing diagram of the pixel circuit in the display module shown in fig. 9. As shown in fig. 10, the first mode includes an initialization phase t1, a data writing phase t2, and a light emitting phase t3. In the first mode, the first power supply voltage signal output terminal PVDD out Providing a forward voltage signal, such as a +4.6V voltage signal; second power supply voltage signal output terminal PVEE out A negative going voltage signal, such as a-2.7V voltage signal, is provided.
In the initialization stage t1, the first scan signal output terminal S1 out Providing a conduction level, a second scan signal output terminal S2 out Providing cut-off level, light emission control signal output terminal EM out Providing a cut-off level. The first reset transistor M3 is turned on in response to the on level transmitted by the first scan signal line S1, and the reference voltage signal of the reference voltage signal line vref is transmitted to the gate of the driving transistor M1 through the first reset transistor M3 to reset the gate of the driving transistor M1. The second reset transistor M5 is turned on in response to the on level transmitted by the first scan signal line S1, and the reference voltage signal of the reference voltage signal line vref is transmitted to the first electrode of the light emitting element 81 through the second reset transistor M5 to reset the first electrode of the light emitting element 81.
In the data writing stage t2, the first scan signal output terminal S1 out Providing a cut-off level, a second scan signal output terminal S2 out Provide the conduction level, the luminous control signal output terminal EM out Providing a cut-off level. The data writing transistor M2 and the threshold compensating transistor M4 are turned on in response to the conduction level transmitted by the second scan signal line S2, the sub data signal output terminal data out1 ～data out3 The data signal provided by at least one of the red, green and blue sub-pixels R, G and B in the first display area A1 is written into the first pole of the driving transistor M1, and the compensation of the threshold voltage of the driving transistor M1 is completed.
In the light-emitting stage t3, the first scan signal output terminal S1 out Providing a cut-off level, a second scan signal output terminal S2 out Providing cut-off level, light emissionControl signal output terminal EM out Providing a turn-on level. The first and second light emission control transistors M6 and M7 are turned on in response to the on level transmitted by the light emission control signal line EM, and the driving transistor M1 of at least one of the red, green, and blue sub-pixels R, G, and B in the first display area A1 is turned on in response to the on level maintained by the storage capacitor Cst, so that the light emitting element 81 of at least one of the red, green, and blue sub-pixels R, G, and B in the first display area A1 emits light.
Fig. 11 is a schematic top view of a display module according to an embodiment of the disclosure. As shown in fig. 11, according to some embodiments of the present application, alternatively, the display panel 01 may include a functional area 110, and the functional area 110 may not be provided with sub-pixels PX. That is, a functional area 110 may be provided in a part of the space in the display panel 01, and the functional area 110 may be provided with an element such as a headphone, so the functional area 110 shown in fig. 11 may be referred to as a "notch area". At least three sides of the functional region 110 may be surrounded by the second display region A2, and the first display region A1 may be disposed around at least three sides of the functional region 110, such as "left", "right", and "lower" of the functional region 110.
In this way, the first display area A1 is disposed around the "notch area", that is, the first display area A1 is located at the edge of the second display area A2, so that the sub-pixels in the second display area A2 can be more concentrated, and cannot be divided by the first display area A1, so as to ensure the display effect of the second display area A2.
Fig. 12 is another schematic top view of a display module according to an embodiment of the disclosure. As shown in fig. 12, unlike the embodiment shown in fig. 11, alternatively, according to other embodiments of the present application, the functional area 110 may be provided with sub-pixels PX, and the light transmittance of the functional area 110 is greater than that of the second display area A2, i.e., the pixel density of the functional area 110 is less than that of the second display area A2. Thus, an under-screen camera or the like can be provided in the functional area 110 to realize a full screen, and thus the functional area 110 can be referred to as a "sub-screen area". The functional region 110 may be surrounded by the second display region A2, and the first display region A1 may be disposed around at least three sides of the functional region 110.
In this way, the first display area A1 is disposed around the "sub-screen area", that is, the first display area A1 is located at the edge of the second display area A2, so that the sub-pixels in the second display area A2 can be more concentrated, and cannot be divided by the first display area A1, thereby ensuring the display effect of the second display area A2.
Fig. 13 is a schematic top view of a display module according to an embodiment of the disclosure. As shown in fig. 13, the second display area A2 may optionally include a plurality of sides and a corner g at the interface of any two adjacent sides, according to further embodiments of the present application. The first display area A1 may be located at a side of at least one corner g away from the center O of the second display area A2 in a direction parallel to the plane in which the display panel is located.
In this way, since the first display area A1 is located at the edge corner g of the second display area A2, the sub-pixels in the second display area A2 can be more concentrated, and cannot be divided by the first display area A1, so as to ensure the display effect of the second display area A2.
It should be noted that the first display area A1 may be disposed at other positions, for example, at an edge of the second display area A2 or in the second display area A2, which is not limited in the embodiment of the present application.
According to some embodiments of the present application, optionally, in the second mode, the second display area A2 may display a screen. The second mode may be understood as a normal display mode, and the second display area A2 may normally display a picture when the second mode, i.e., when the first mode is exited. Wherein, the refresh frequency of the first display area A1 in the first mode is smaller than the refresh frequency of the second display area A2 in the second mode. Illustratively, for example, the second display area A2 switches pictures at a refresh frequency of 60Hz or 120Hz in the second mode, and the refresh frequency of the first display area A1 in the first mode may be less than 60Hz. In some specific examples, for example, the refresh frequency of the first display area A1 in the first mode may be equal to 1Hz.
In this way, the first display area A1 switches the frame at a lower refresh frequency during the first mode, so that the power consumption of the display module can be further reduced.
According to some embodiments of the present application, optionally, in the second mode, the second display area A2 displays a picture, and the first driving module 02 does not output a voltage signal to the sub-pixels in the first display area A1. That is, when the second display area A2 displays a screen, the first display area A1 may not be displayed, and each signal line in the first display area A1 may be in a high-resistance state.
Therefore, when the second display area A2 displays the picture, the first display area A1 is not displayed in the black state, so that the influence on the display effect of the second display area A2 caused by the display of the pure-color picture by the first display area A1 can be avoided, and the display module is ensured to have a better display effect.
Fig. 14 is a schematic top view of a display module according to an embodiment of the disclosure. As shown in fig. 14, according to further embodiments of the present application, optionally, the display module 30 may further include a second driving module 03, where the second driving module 03 may be electrically connected to the sub-pixels in the second display area A2, and the second driving module 03 is configured to provide a voltage signal to the sub-pixels in the second display area A2 to drive the sub-pixels in the second display area A2 to emit light in the second mode. The first driving module 02 and the second driving module 03 may be integrated inside the driving chip 04 of the display module 30. That is, the first driving module 02 and the second driving module 03 may be part of an internal circuit in the driving chip 04 of the display module 30.
In this way, in the first mode, only a part of the driving circuits (i.e., the first driving module 02) of the driving chip 04 is operated, and the other part of the driving circuits (i.e., the second driving module 03) is not operated, so that the power consumption of the driving chip 04 can be reduced as a whole.
Based on the display module 30 provided in the foregoing embodiment, correspondingly, the embodiment of the application further provides a specific implementation manner of the driving method of the display module.
First, it should be noted that the display module applied in the driving method of the display module provided in the embodiment of the present application has the same structure as the display module 30 provided in the above embodiment. That is, the display module applied in the driving method of the display module provided in the embodiment of the present application may be the display module 30 provided in the embodiment described above.
As shown in fig. 3, a display module 30 to which the driving method of a display module provided in the embodiment of the present application is applied includes a display panel 01 and a first driving module 02, where the display panel 01 includes a first display area A1 and a second display area A2. The first display area A1 and the second display area A2 may each be provided with sub-pixels, and the area of the second display area A2 may be larger than that of the first display area A1. The first driving module 02 is electrically connected to the plurality of sub-pixels PX in the first display area A1. In the first mode, the second display area A2 is in a screen-off state.
As shown in fig. 15, the driving method of the display module provided in the embodiment of the present application may be applied to the first driving module 02, and the method may include the following steps:
s101, in a first mode, providing a voltage signal to at least part of the sub-pixels in the first display area so as to enable the at least part of the sub-pixels in the first display area to emit light.
The first mode may also be referred to as a screen-off display (Always On Display, AOD) mode, that is, when in the first mode, only the first display area A1 is displayed in the display panel 01, and the second display area A2 is not displayed.
According to the driving method of the display module, the display module comprises a display panel and a first driving module, the display panel comprises a first display area and a second display area, and the first driving module is electrically connected with a plurality of sub-pixels in the first display area; in the first mode, the second display area is in a screen-off state, and the first driving module provides voltage signals for at least part of the sub-pixels in the first display area so as to enable the at least part of the sub-pixels in the first display area to emit light. On the one hand, the first display area in the display panel serves as a breathing lamp, so that an LED lamp is not required to be additionally arranged on the display panel, and the problem that the whole screen has no breathing lamp can be solved; on the other hand, in the first mode, since only at least part of the sub-pixels in the first display area emit light and the second display area does not emit light, power consumption of the display panel can be reduced; in yet another aspect, in the first mode, the first driving module provides the voltage signal only to at least some of the sub-pixels in the first display area, and does not need to provide the voltage signal to the sub-pixels in the second display area, so that the power consumption of the driving module (including the first driving module) can be reduced as a whole.
As shown in fig. 8, according to some embodiments of the present application, alternatively, the display panel 01 may include a scan signal line S and a data signal line data, and the first driving module 02 may include a scan signal output terminal S out And a data signal output terminal data out . The scanning signal lines S are respectively connected with the scanning signal output terminals S out The sub-pixels PX in the first display area A1 are electrically connected for transmitting scanning signals to the sub-pixels PX in the first display area A1. The data signal line data and the data signal output terminal data respectively out The sub-pixels PX in the first display area A1 are electrically connected for transmitting data signals to the sub-pixels PX in the first display area A1.
The data signal line data may include N sub-data signal lines data 1 ～data N Data signal output terminal data out Can include N sub data signal output terminals data out1 ～data outN N sub data signal lines data 1 ～data N And N sub data signal output terminals data out1 ～data outN And the electric connection is in one-to-one correspondence, and N is larger than 1 and is an integer. The first display area A1 can comprise N color sub-pixels, N color sub-pixels and N sub-data signal lines 1 ～data N The sub-pixels of the same color in the first display area A1 are electrically connected with the same sub-data signal line, the sub-pixels of different colors in the first display area A1 are electrically connected with different sub-data signal lines,
For example, the sub-pixels PX in the first display region A1 may include a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B. All red subpixels R in the first display area A1 can be connected with the subpixel data signal line data 1 Electrically connected, all green sub-pixels G in the first display area A1 can be connected with the sub-data signal line data 2 Electrically connected, all blue sub-pixels B in the first display area A1 canTo and from the sub data signal line data 3 And (5) electric connection.
Accordingly, S101 may specifically include the following steps:
in the first mode, the scan signal output terminal supplies a scan signal to the sub-pixels in the first display area through the scan signal line, and the at least one sub-data signal output terminal supplies a data signal to the sub-pixels of at least one color in the first display area through the corresponding sub-data signal line, so that the sub-pixels of at least one color in the first display area emit light.
Fig. 16 is a timing diagram of the pixel circuit in the display module shown in fig. 8. As shown in fig. 16, optionally, in the first mode, the first power supply voltage signal output terminal PVDD out Providing a forward voltage signal, such as a +4.6V voltage signal; second power supply voltage signal output terminal PVEE out A negative going voltage signal, such as a-2.7V voltage signal, is provided. Scanning signal output terminal S out Providing an on level (e.g., low level), a sub data signal output terminal data out1 ～data out3 Provides an on level (e.g., low level). The data write transistor M2 is responsive to the scan signal output terminal S out The sub data signal output terminal data is turned on by the supplied turn-on level out1 ～data out3 The turn-on level is supplied to the gate of the driving transistor M1 through the data writing transistor M2, and the driving transistor M1 is turned on. First power supply voltage signal output terminal PVDD out The supplied forward voltage signal is transmitted to the light emitting element 81 through the first power voltage signal line PVDD and the driving transistor M1, so that the red, green and blue sub-pixels R, G and B in the first display area A1 all emit light, for example, the first display area A1 displays a white picture.
Fig. 17 is another timing diagram of the pixel circuit in the display module shown in fig. 8. As shown in fig. 17, unlike the embodiment shown in fig. 16, according to other embodiments of the present application, alternatively, the sub data signal output terminal data out1 Providing a conduction level, a sub data signal output terminal data out2 ～data out3 The first display area A1 displays a red picture by providing a cut-off level.
Fig. 18 is a timing diagram of a pixel circuit in the display module shown in fig. 8. As shown in fig. 18, unlike the embodiment shown in fig. 16, according to other embodiments of the present application, alternatively, the sub data signal output terminal data out2 Providing a conduction level, a sub data signal output terminal data out1 And data out3 The first display area A1 displays a green picture by providing a cut-off level.
Fig. 19 is a timing diagram of a pixel circuit in the display module shown in fig. 8. As shown in fig. 19, unlike the embodiment shown in fig. 16, according to other embodiments of the present application, alternatively, the sub data signal output terminal data out3 Providing a conduction level, a sub data signal output terminal data out1 And data out2 The first display area A1 displays a blue picture by providing a cut-off level.
In other embodiments of the present application, the sub data signal output terminal data is adjusted out2 ～data out3 The first display area A1 may also display other color pictures such as yellow, cyan, or violet, etc. in combination of the size of the output data signal and the data signals output from any two sub data signal output terminals.
Based on the display module 30 provided in the foregoing embodiment, correspondingly, the application further provides a display device, including the display module 30 provided in the application. Referring to fig. 20, fig. 20 is a schematic structural diagram of a display device according to an embodiment of the present application. Fig. 20 provides a display device 1000 including a display module 30 according to any of the embodiments described above. The embodiment of fig. 20 is, for example, a mobile phone as an example, and the display device 1000 is described, and it is to be understood that the display device provided in the embodiment of the present application may be a wearable product, a computer, a television, a vehicle-mounted display device, or other display devices having a display function, which is not particularly limited in this application. The display device provided in this embodiment has the beneficial effects of the display module 30 provided in this embodiment, and the specific description of the display module 30 in each embodiment can be referred to specifically, which is not repeated here.
In some specific embodiments, optionally, display device 1000 includes, but is not limited to, an OLED display device.
It should be understood that the specific structures of the pixel circuits and the layout structures of the display panels provided in the drawings in the embodiments of the present application are only examples and are not intended to limit the present application. In addition, the above embodiments provided herein may be combined with each other without contradiction.
These embodiments are not all details described in detail in accordance with the embodiments described hereinabove, nor are they intended to limit the application to the specific embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various modifications as are suited to the particular use contemplated. This application is to be limited only by the claims and the full scope and equivalents thereof.

Claims (13)

1. The display module is characterized by comprising a display panel and a first driving module, wherein the display panel comprises a first display area and a second display area, and the first driving module is electrically connected with a plurality of sub-pixels in the first display area;
In a first mode, the second display area is in a screen-off state, and the first driving module provides voltage signals for at least part of the sub-pixels in the first display area so as to enable at least part of the sub-pixels in the first display area to emit light;
the display panel comprises a scanning signal line and a data signal line, and the first driving module comprises a scanning signal output terminal and a data signal output terminal;
the scanning signal line is electrically connected with the scanning signal output terminal and the sub-pixel in the first display area, and the data signal line is electrically connected with the data signal output terminal and the sub-pixel in the first display area;
in the first mode, the scan signal output terminal supplies a scan signal to the sub-pixels in the first display area through the scan signal line, and the data signal output terminal supplies a data signal to the sub-pixels in the first display area through the data signal line to cause at least part of the sub-pixels in the first display area to emit light;
the data signal lines comprise N sub data signal lines, the data signal output terminals comprise N sub data signal output terminals, the first display area comprises N sub data signal lines with N colors, the N sub data signal lines are electrically connected with the N sub data signal output terminals in a one-to-one correspondence manner, the N sub data signal lines with N colors are electrically connected with the same sub data signal line, the sub pixels with the same color in the first display area are electrically connected with different sub data signal lines, and N is larger than 1 and is an integer; or alternatively, the process may be performed,
The plurality of sub-pixels in the first display area are electrically connected to the same data signal line.
2. The display module of claim 1, wherein a plurality of sub-pixels in the first display area are electrically connected to the same scanning signal line; or alternatively, the process may be performed,
the scanning signal lines comprise M sub-scanning signal lines, the scanning signal output terminals comprise M sub-scanning signal output terminals, the first display area comprises sub-pixels with M colors, the M sub-scanning signal lines are electrically connected with the M sub-scanning signal output terminals in one-to-one correspondence, the sub-pixels with the M colors are electrically connected with the same sub-scanning signal lines, the sub-pixels with the same color in the first display area are electrically connected with different sub-scanning signal lines, and M is larger than 1 and is an integer.
3. The display module of claim 1, wherein the display panel further comprises a first power supply voltage signal line and a second power supply voltage signal line, the first drive module further comprises a first power supply voltage signal output terminal and a second power supply voltage signal output terminal, the first power supply voltage signal line is electrically connected to the first power supply voltage signal output terminal, and the second power supply voltage signal line is electrically connected to the second power supply voltage signal output terminal;
A plurality of sub-pixels in the first display area are electrically connected with the same first power supply voltage signal line; and/or the number of the groups of groups,
the plurality of sub-pixels in the first display area are electrically connected with the same second power supply voltage signal line.
4. The display module of claim 1, wherein the display panel further comprises a first power supply voltage signal line and a second power supply voltage signal line, the sub-pixel comprising a pixel circuit and a light emitting element, the pixel circuit comprising:
a driving transistor having a first electrode electrically connected to the first power supply voltage signal line and a second electrode electrically connected to the first electrode of the light emitting element;
a data writing transistor, a gate of which is electrically connected to the scanning signal line, a first pole of which is electrically connected to the data signal line, and a second pole of which is electrically connected to the gate of the driving transistor;
wherein a second pole of the light emitting element is electrically connected to the second power supply voltage signal line.
5. The display module of claim 1, wherein the display panel further comprises a light emission control signal line and a reference voltage signal line, the first drive module further comprises a light emission control signal output terminal and a reference voltage signal output terminal, the light emission control signal line is electrically connected to the light emission control signal output terminal, and the reference voltage signal line is electrically connected to the reference voltage signal output terminal;
The scanning signal line further comprises a first scanning signal line and a second scanning signal line, the scanning signal output terminal comprises a first scanning signal output terminal and a second scanning signal output terminal, the first scanning signal line is electrically connected with the first scanning signal output terminal, and the second scanning signal line is electrically connected with the second scanning signal output terminal;
a plurality of sub-pixels in the first display area are electrically connected with the same light-emitting control signal line; and/or the number of the groups of groups,
a plurality of sub-pixels in the first display area are electrically connected with the same reference voltage signal line; and/or the number of the groups of groups,
the plurality of sub-pixels in the first display area are electrically connected with the same first scanning signal line and/or the same second scanning signal line.
6. The display module of claim 5, wherein the display panel further comprises a first power supply voltage signal line and a second power supply voltage signal line, the subpixel comprises a pixel circuit and a light emitting element, the pixel circuit comprises:
a driving transistor having a first electrode electrically connected to the first power supply voltage signal line and a second electrode electrically connected to the first electrode of the light emitting element;
A first reset transistor having a gate electrically connected to the first scan signal line, a first electrode electrically connected to the reference voltage signal line, and a second electrode electrically connected to the gate of the driving transistor;
a data writing transistor, a gate of which is electrically connected to the second scanning signal line, a first pole of which is electrically connected to the data signal line, and a second pole of which is electrically connected to the first pole of the driving transistor;
a threshold compensation transistor, a gate of which is electrically connected to the second scanning signal line, a first pole of which is electrically connected to the gate of the driving transistor, and a second pole of which is electrically connected to the first pole of the driving transistor;
a second reset transistor having a gate electrically connected to the first scan signal line, a first electrode electrically connected to the reference voltage signal line, and a second electrode electrically connected to the first electrode of the light emitting element;
A first light emission control transistor having a gate electrically connected to the light emission control signal line, a first electrode electrically connected to the first power supply voltage signal line, and a second electrode electrically connected to the first electrode of the driving transistor;
a second light emission control transistor having a gate electrically connected to the light emission control signal line, a first electrode electrically connected to the second electrode of the driving transistor, and a second electrode electrically connected to the first electrode of the light emitting element;
wherein a second pole of the light emitting element is electrically connected to the second power supply voltage signal line.
7. The display module according to claim 1, wherein the display panel includes a functional region, the functional region is not provided with sub-pixels or a light transmittance of the functional region is greater than a light transmittance of the second display region, and at least three sides of the functional region are surrounded by the second display region;
the first display area is disposed around at least three sides of the functional area.
8. The display module of claim 1, wherein the second display area comprises a plurality of sides and corners at the interface between any two adjacent sides;
the first display area is located on a side of at least one of the corners away from a center of the second display area in a direction parallel to a plane in which the display panel is located.
9. The display module of claim 1, wherein in a second mode, the second display region displays a picture, and wherein a refresh frequency of the first display region in the first mode is less than a refresh frequency of the second display region in the second mode.
10. The display module of claim 1, wherein in the second mode, the second display region displays a picture, and the first driving module does not output a voltage signal to the sub-pixels in the first display region.
11. The display module of claim 1, further comprising a second drive module electrically connected to the sub-pixels in the second display area, the second drive module configured to provide a voltage signal to the sub-pixels in the second display area in a second mode;
The first driving module and the second driving module are integrated inside the driving chip of the display module.
12. The driving method of the display module is characterized in that the display module comprises a display panel and a first driving module, the display panel comprises a first display area and a second display area, the first driving module is electrically connected with a plurality of sub-pixels in the first display area, and in a first mode, the second display area is in a screen-off state;
the driving method is applied to the first driving module, and the driving method comprises the following steps:
in the first mode, providing a voltage signal to at least a portion of the subpixels in the first display area to cause at least a portion of the subpixels in the first display area to emit light;
the display panel comprises a scanning signal line and a data signal line, and the first driving module comprises a scanning signal output terminal and a data signal output terminal;
the scanning signal line is electrically connected with the scanning signal output terminal and the sub-pixel in the first display area, and the data signal line is electrically connected with the data signal output terminal and the sub-pixel in the first display area;
The data signal lines comprise N sub data signal lines, the data signal output terminals comprise N sub data signal output terminals, the first display area comprises N sub data signal lines with N colors, the N sub data signal lines are electrically connected with the N sub data signal output terminals in a one-to-one correspondence manner, the N sub data signal lines with N colors are electrically connected with the same sub data signal line, the sub pixels with the same color in the first display area are electrically connected with different sub data signal lines, and N is larger than 1 and is an integer;
the step of providing a voltage signal to at least some of the sub-pixels in the first display area in the first mode specifically includes:
in the first mode, the scan signal output terminals supply scan signals to the sub-pixels in the first display area through the scan signal lines, and at least one of the sub-data signal output terminals supplies data signals to the sub-pixels of at least one color in the first display area through the corresponding sub-data signal lines to cause the sub-pixels of at least one color in the first display area to emit light.
13. A display device comprising the display module of any one of claims 1 to 11.
CN202210444658.6A 2022-04-26 2022-04-26 Display module, driving method thereof and display device Active CN114758620B (en)

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