CN111883059B - OLED driving circuit, method, terminal device and storage medium - Google Patents
OLED driving circuit, method, terminal device and storage medium Download PDFInfo
- Publication number
- CN111883059B CN111883059B CN202010827042.8A CN202010827042A CN111883059B CN 111883059 B CN111883059 B CN 111883059B CN 202010827042 A CN202010827042 A CN 202010827042A CN 111883059 B CN111883059 B CN 111883059B
- Authority
- CN
- China
- Prior art keywords
- switching element
- oled
- terminal
- control signal
- level
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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]
Abstract
The application belongs to the technical field of terminal equipment, and provides an OLED driving circuit, a method, the terminal equipment and a storage medium, wherein the OLED driving circuit comprises a first switch element and a second switch element; the controlled end of the first switch element is used for accessing a first control signal, the first end of the first switch element is used for accessing a power supply signal, the second end of the first switch element is electrically connected with the first end of the second switch element, and the second end of the first switch element and the first end of the second switch element are provided with parasitic elements; the controlled end of the second switch element is used for accessing a second control signal, the second end of the second switch element is used for being electrically connected with the anode of one OLED, and when the OLED drive circuit is positioned in a low pixel density area, the second switch element is far away from the first switch element and is close to the anode of the OLED; by adding a second switching element electrically connected to the anode of the OLED, the OLED is controlled to be lighted after the parasitic element is fully charged, so that the OLEDs located in the low pixel density region and the high pixel density region can be lighted at the same time.
Description
Technical Field
The application belongs to the technical field of terminal equipment, and particularly relates to an OLED driving circuit, an OLED driving method, terminal equipment and a storage medium.
Background
With the continuous development of science and technology, terminal devices such as mobile phones, tablet computers, notebook computers, personal digital assistants and the like are in endless numbers, and great convenience is brought to daily life and entertainment of people. At present, terminal equipment is continuously developed towards a large screen, and in order to increase the screen occupation ratio of the terminal equipment, a camera is generally arranged below a display screen of the terminal equipment. The design scheme of the existing under-screen camera of the terminal device is that part of Pixels on a display screen, which are located in a camera area, are usually removed to reduce the pixel density (Pixels Per inc, PPI) of the camera area, so that light in the environment can enter the camera through gaps between the Pixels located in the camera area, the camera area can display a picture without affecting the camera function of the camera, the camera area with part of the Pixels removed is called a low pixel density area (i.e., an L area), and a non-camera area with normal pixel density is called a high pixel density area (i.e., an H area).
However, since the pixels in the L region generally dispose an Organic Light-Emitting Diode (OLED) in a viewing angle (FOV) region of the camera, dispose an OLED driving circuit outside the FOV region, and connect the OLED and the OLED driving circuit through a metal wire, a parasitic capacitance, a parasitic resistance, or a parasitic inductance is easily generated in the metal wire, so that when the OLED in the L region and the OLED in the H region are simultaneously driven, the OLED in the L region is delayed from being lit in the H region, and a display effect of the terminal device is reduced.
Disclosure of Invention
The application aims to provide an OLED driving circuit, an OLED driving method, a terminal device and a storage medium, and aims to solve the problem that when the existing terminal device in specific different pixel density areas simultaneously drives an OLED in an L area and an OLED in an H area, the OLED in the L area is delayed to be turned on relative to the OLED in the H area, and the display effect of the terminal device is reduced.
A first aspect of an embodiment of the present application provides an OLED driving circuit applied to a terminal device having regions with different pixel densities, the OLED driving circuit including a first switching element and a second switching element;
the controlled end of the first switch element is used for accessing a first control signal, the first end of the first switch element is used for accessing a power supply signal, the second end of the first switch element is electrically connected with the first end of the second switch element, and the second end of the first switch element and the first end of the second switch element are provided with parasitic elements;
the controlled end of the second switch element is used for accessing a second control signal, the second end of the second switch element is used for being electrically connected with the anode of one OLED, and when the OLED driving circuit is positioned in a low pixel density area, the second switch element is far away from the first switch element and is close to the anode of the OLED;
the first switch element is used for conducting when a first level of a first control signal is switched in, so that the power supply signal charges the parasitic element;
the second switch element is used for being switched on when the parasitic element is fully charged and then is switched in the first level of the second control signal, so that the power supply signal drives the OLED to be lightened;
wherein a lag time of the first level of the second control signal relative to the first level of the first control signal is greater than or equal to a charging time required for a parasitic element in the OLED drive circuit located in the low pixel density region.
In one embodiment, when the OLED is located in the low pixel density region, the second switching element is disposed below an anode of the OLED.
In one embodiment, the OLED driving circuit further includes a storage capacitor, a third switching element, a fourth switching element, a fifth switching element, a sixth switching element, and a seventh switching element;
the first end of the storage capacitor is used for accessing the power supply signal, and the second end of the storage capacitor is electrically connected with the controlled end of the fourth switching element, the first end of the fifth switching element and the first end of the sixth switching element;
a controlled terminal of the third switching element, a controlled terminal of the fifth switching element, and a controlled terminal of the seventh switching element are used for receiving an nth-level scan signal, a first terminal of the third switching element is used for receiving a data signal, and a second terminal of the third switching element is electrically connected to the first terminal of the first switching element and the first terminal of the fourth switching element;
a second terminal of the fourth switching element is electrically connected to a second terminal of the fifth switching element and a first terminal of the second switching element;
the controlled end of the sixth switching element is used for accessing an N-1 level scanning signal, and the second end of the sixth switching element and the first end of the seventh switching element are used for accessing a reference voltage signal;
a second terminal of the seventh switching element is electrically connected to a second terminal of the second switching element.
In one embodiment, the first level is a low level, and the parasitic element is a parasitic element between the second terminal of the fourth switching element and the first terminal of the second switching element.
In one embodiment, the OLED driving circuit further includes a storage capacitor, a third switching element, a fourth switching element, a fifth switching element, and a sixth switching element;
the first end of the storage capacitor is used for accessing the power supply signal, and the second end of the storage capacitor is electrically connected with the first end of the third switching element and the controlled end of the fourth switching element;
a controlled end of the third switching element and a controlled end of the fifth switching element are used for accessing an nth-level scanning signal, and a second end of the third switching element is electrically connected with a first end of the second switching element, a first end of the fourth switching element and a first end of the sixth switching element;
a second terminal of the fourth switching element is electrically connected to a second terminal of the first switching element and a first terminal of the fifth switching element;
a second end of the fifth switching element is used for accessing a data signal;
and the controlled end of the sixth switching element is used for accessing a reset signal, and the second end of the sixth switching element is used for accessing a reference voltage signal.
In one embodiment, the first level is a low level, and the parasitic element is a parasitic element between the second terminal of the fourth switching element and the first terminal of the second switching element.
A second aspect of embodiments of the present application provides a terminal device, comprising regions of different pixel density, a plurality of OLEDs, and a plurality of OLED driving circuits as described in the first aspect of embodiments of the present application, one said OLED being electrically connected to one said OLED driving circuit.
In one embodiment, the terminal device further comprises a processor;
the processor is respectively and electrically connected with the first control signal end and the second control signal end of each OLED driving circuit;
the processor is configured to:
outputting a first level of the first control signal to first control signal ends of all the OLED driving circuits so that the power supply signal charges all the parasitic elements;
and after the parasitic element is fully charged, outputting the first level of the second control signal to second control signal ends of all the OLED driving circuits, so that the power supply signal drives all the OLEDs to be lightened simultaneously.
A third aspect of the embodiments of the present application provides an OLED driving method, which is implemented based on the terminal device according to the second aspect of the embodiments of the present application, and the OLED driving method includes the following steps executed by the processor:
outputting a first level of the first control signal to first control signal ends of all the OLED driving circuits so that the power supply signal charges all the parasitic elements;
and after the parasitic element is fully charged, outputting the first level of the second control signal to second control signal ends of all the OLED driving circuits, so that the power supply signal drives all the OLEDs to be lightened simultaneously.
A fourth aspect of embodiments of the present application provides a computer-readable storage medium, which stores a computer program, which, when executed by a processor, implements the steps of the OLED driving method according to the third aspect of embodiments of the present application.
A first aspect of embodiments of the present application provides an OLED driving circuit applied to a terminal device having regions with different pixel densities, the OLED driving circuit including a first switching element and a second switching element; the controlled end of the first switch element is used for accessing a first control signal, the first end of the first switch element is used for accessing a power supply signal, the second end of the first switch element is electrically connected with the first end of the second switch element, and the second end of the first switch element and the first end of the second switch element are provided with parasitic elements; the controlled end of the second switch element is used for accessing a second control signal, the second end of the second switch element is used for being electrically connected with the anode of one OLED, and when the OLED drive circuit is positioned in a low pixel density area, the second switch element is far away from the first switch element and is close to the anode of the OLED; the first switch element is used for conducting when the first level of the first control signal is switched in, so that the power supply signal charges the parasitic element; the second switch element is used for switching on when the parasitic element is fully charged and then is switched in the first level of the second control signal, so that the power supply signal drives the OLED to be lightened; wherein a lag time of the first level of the second control signal relative to the first level of the first control signal is greater than or equal to a charging time required for a parasitic element located in the low pixel density region; the OLED driving circuit is additionally provided with the switching element electrically connected with the anode of the OLED to control the OLED to be lightened after the parasitic element is fully charged, and the charging time is reserved for the parasitic element, so that the OLED in the low pixel density area and the OLED in the high pixel density area of the terminal device can be lightened simultaneously, and the display effect of the terminal device is improved.
Drawings
Fig. 1 is a schematic structural diagram of a terminal device according to an embodiment of the present application;
fig. 2 is a schematic diagram of a connection structure between an OLED driving circuit in an L region and an OLED provided in an embodiment of the present application;
fig. 3 is a schematic diagram of a basic structure of an OLED driving circuit provided in an embodiment of the present application;
fig. 4 is a schematic structural diagram of a first OLED driving circuit provided in an embodiment of the present application;
fig. 5 is a schematic signal timing diagram of a first OLED driving circuit according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a second OLED driving circuit according to an embodiment of the present disclosure;
fig. 7 is a signal timing diagram of a second OLED driving circuit according to an embodiment of the present disclosure.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
As shown in fig. 1, an embodiment of the present application provides a terminal device 100, which includes a display screen and a camera disposed below the display screen, where the display screen includes an L region 10 and an H region 20, an OLED in the L region 10 is located in a viewing angle region 11 of the camera, and an OLED driving circuit in the L region 10 is located in a non-viewing angle region 12.
In application, the terminal device may be a mobile phone, a tablet computer, a notebook computer, a personal digital assistant, a television, a multimedia display screen, and the like, which have different pixel density areas. Fig. 1 exemplarily shows that the terminal device is a device having a display Screen and an off-Screen camera, for example, a full-Screen camera, a camera having a pop-up camera, a Bang Screen (Bang Screen) camera, or the like.
In application, the display screen may be a flat or curved display screen based on OLED technology. The display screen may include a screen driver (TCON), a Source Drive Circuit (Source Drive Circuit), a Gate Drive Circuit (Gate Drive Circuit), and a plurality of OLED Drive circuits and a plurality of OLEDs regularly arranged in an array form. The display screen may not include a screen driving board, and the function of the screen driving board is realized by a processor of the terminal device. The Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or switch element logic device, discrete hardware component, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The Source OLED driving circuit can be a Source Driver IC (Source Driver IC) or a thin-Film gate Driver IC (S-COF), etc. The Gate OLED driving circuit may be a Gate Driver IC (Gate Driver IC), a thin Film Gate Driver IC (G-COF, Gate-Chip on Film), or the like.
In application, each OLED driving circuit is used for inputting a power supply signal, a control signal, a data signal and a scanning signal respectively so as to drive one OLED electrically connected with the OLED to be turned on or turned off. The OLED driving circuit includes a storage capacitor and several switching elements, and the switching elements may be any type of transistors, such as Bipolar Junction Transistors (BJTs), Field Effect Transistors (FETs), Thin Film Transistors (TFTs), or the like. The field effect Transistor may specifically be a Metal Oxide Semiconductor Field Effect Transistor (MOSFET), such as an N-Metal-Oxide-Semiconductor (NMOS) or a P-Metal-Oxide-Semiconductor (PMOS) Transistor.
In an application, when the terminal device is a device having a display screen and a camera below the screen, the L region is a region of the display screen located above the camera, the viewing angle region is a region of the L region located above a lens of the camera, the non-viewing angle region is a region of the L region other than the viewing angle region, and the H region is a region of the display screen other than the L region. In this embodiment, the upper direction refers to a direction from the back shell of the terminal device to the display screen, and the lower direction refers to a direction from the display screen to the back shell.
As shown in fig. 2, a connection structure between one OLED driving circuit 13 and one OLED in the L region 10 is exemplarily shown; the OLED driving circuit 13 is located in the non-viewing angle region 12, the OLED is located in the viewing angle region 11, the OLED driving circuit 13 and the OLED are connected through a metal wire, the OLED is denoted as an OLED, and a parasitic element generated on the metal wire is denoted as a parasitic capacitor C.
In application, the metal lines may be transparent metal lines, for example, Indium Tin Oxide (ITO) metal lines, Aluminum Zinc Oxide (AZO) metal lines, and the like. Since the metal line between the OLED driving circuit and the OLED in the L region is longer than the routing distance of the connection line between the OLED driving circuit and the OLED in the H region, a larger parasitic element such as parasitic capacitance, parasitic resistance, or parasitic inductance may be generated on the metal line. When the screen driving board outputs a control signal to simultaneously drive the OLED in the L area and the OLED in the H area to be lightened, the OLED driving circuit in the L area and the OLED driving circuit in the H area can drive the OLED to be lightened after the parasitic elements are fully charged, but the charging time of the parasitic elements in the L area is longer than that of the parasitic elements in the H area, so that the OLED in the L area is delayed to be lightened relative to the OLED in the H area, the lightening time of the OLED in the L area and that of the OLED in the H area of the display screen are inconsistent, when the display screen is driven to be lightened, obvious bright and dark boundaries appear on the display screen, and the display effect of the terminal equipment is seriously reduced.
The OLED driving circuit applied to the terminal device 100 in the embodiment corresponding to fig. 1 provided in the embodiment of the present application can eliminate the difference between the lighting times of the OLEDs in the L region and the H region of the display screen, so that the OLEDs in the L region and the H region can be simultaneously lighted, thereby improving the display effect of the terminal device.
As shown in fig. 3, the OLED driving circuits 1 and 2 provided in the embodiments of the present application include a first switching element Q1 and a second switching element Q2;
a controlled terminal of the first switching element Q1 is used for receiving a first control signal EM1, a first terminal of the first switching element Q1 is used for receiving a power supply signal VDD, a second terminal of the first switching element Q1 is electrically connected with a first terminal of the second switching element Q2, and a second terminal of the first switching element Q1 and a first terminal of the second switching element Q2 are provided with parasitic elements;
a controlled terminal of the second switching element Q2 is used for accessing the second control signal EM2, a second terminal of the second switching element Q2 is used for electrically connecting with an anode of an OLED, and when the OLED driving circuit is located in a low pixel density area of the display screen, the second switching element Q2 is far away from the first switching element Q1 and is close to the anode of the OLED;
the first switching element Q1 is configured to turn on when the first level of the first control signal EM1 is switched on, so that the power signal charges the parasitic element;
the second switching element Q2 is used for switching on when the first level of the second control signal EM2 is switched on after the parasitic element is fully charged, so that the power supply signal VDD drives the OLED to be turned on;
wherein a lag time of the first level of the second control signal EM1 with respect to the first level of the first control signal EM2 is greater than or equal to a charging time required for a parasitic element in the OLED driving circuit located in the low pixel density region.
In application, the first switch element is used for isolating the power supply signal and the data signal when the OLED drive circuit writes the data signal, and is also used for switching on or off under the control of the first control signal. The structure of the OLED driving circuit provided in the embodiment of the present application is similar to that of any commonly used OLED driving circuit including the first switching element, and the differences are that: the OLED driving circuit provided by the embodiment of the application is additionally provided with a second switching element which is electrically connected with the anode of the OLED. The second switching element functions to: when the first switch element is turned on to enable the power supply signal to charge the parasitic element, the first switch element is turned off under the control of the second level of the second control signal, after the parasitic element is fully charged, the first switch element is turned on under the control of the first level of the second control signal, so that the power supply signal drives the OLED to be electrically lighted, and enough charging time is reserved for the parasitic element by delaying the turn-on relative to the first switch element. The first level is a low level, the second level is a high level, or the first level is a high level, the second level is a low level; a low level may equivalently be described as a falling edge and a high level may equivalently be described as a rising edge.
In application, compared with the H region, the routing distance between the second end of the first switch element and the first end of the second switch element in the L region is longer, and the parasitic element is larger, so as to ensure that the lag time of the first level of the second control signal relative to the first level of the first control signal is greater than or equal to the charging time required by the parasitic element in the L region, it can be ensured that all the parasitic elements in the L region and the H region between the second end of the first switch element and the first end of the second switch element can be fully charged in the lag time, so that when the second switch element is turned on, the OLEDs in the L region and the H region can be simultaneously turned on. The size of the parasitic element between the second end of the first switching element and the first end of the second switching element in the H region may be 0, i.e., the parasitic element may be present.
In application, the structure of the OLED driving circuit in the L region and the H region is similar, except that: the second switch element of the OLED drive circuit in the L region is far away from the first switch element and close to the anode of the OLED, and the second switch element of the OLED drive circuit in the H region is close to the first switch element and close to the anode of the OLED at the same time. By making the second switching element of the OLED driving circuit in the L region far from the first switching element and close to the anode of the OLED, the size of a parasitic element generated on a metal line connected between the anode of the OLED and the OLED driving circuit can be reduced relative to a common OLED driving single path.
The left diagram in fig. 3 exemplarily shows a structural schematic diagram of one OLED driving circuit 1 in the H region, and the right diagram exemplarily shows a structural schematic diagram of one OLED driving circuit 2 in the L region; wherein the left OLED is labeled as OLED1, the right parasitic element is labeled as capacitor C0, and the OLED is labeled as OLED2, all the switching elements are illustrated as transistors, and the cathodes of the OLEDs are connected to a common ground VSS.
In one embodiment, the second switching element of the OLED driving circuit in the L region is disposed below the anode of the OLED.
In application, by arranging the second switching element in the L region below the anode of the OLED electrically connected thereto, the distance of the metal line connected between the second switching element and the anode of the OLED electrically connected thereto can be shortened to the maximum, thereby reducing the size of the parasitic element generated on the metal line as much as possible.
As shown in fig. 4, in one embodiment, the OLED driving circuits 1 and 2 shown in fig. 3 further include a storage capacitor C1, a third switching element Q3, a fourth switching element Q4, a fifth switching element Q5, a sixth switching element Q6 and a seventh switching element Q7;
a first end of the storage capacitor C1 is used for receiving a power supply signal VDD, and a second end of the storage capacitor C1 is electrically connected to the controlled end of the fourth switching element Q4, the first end of the fifth switching element Q5 and the first end of the sixth switching element Q6;
a controlled terminal of the third switching element Q3, a controlled terminal of the fifth switching element Q5, and a controlled terminal of the seventh switching element Q7 are for receiving the nth-stage scan signal GN, a first terminal of the third switching element Q3 is for receiving the data signal, and a second terminal of the third switching element Q3 is electrically connected to a first terminal of the first switching element Q1 and a first terminal of the fourth switching element Q4;
a second terminal of the fourth switching element Q4 is electrically connected with a second terminal of the fifth switching element Q5 and a first terminal of the second switching element Q2;
the controlled terminal of the sixth switching element Q6 is used for receiving the N-1 th scan signal G (N-1), the second terminal of the sixth switching element Q6 and the first terminal of the seventh switching element Q7 are used for receiving the reference voltage signal VINI;
a second terminal of the seventh switching element Q7 is electrically connected with a second terminal of the second switching element Q2.
The left diagram in fig. 4 exemplarily shows a structural schematic diagram of the OLED driving circuit 1 in the H region, and the right diagram exemplarily shows a structural schematic diagram of the OLED driving circuit 2 in the L region; wherein all switching elements are illustrated as transistors.
In application, the first level in the embodiment corresponding to fig. 4 is a low level, and the parasitic element is a parasitic element between the second end of the fourth switching element and the first end of the second switching element.
FIG. 5 exemplarily shows a timing diagram of the first control signal EM1, the N-1 st stage scan signal G (N-1), the N-th stage scan signal GN, the DATA signal DATA, and the second control signal EM2 of FIG. 4; wherein the lag time of the low level of the second control signal EM2 with respect to the low level of the first control signal EM1 is denoted as Δ t.
As shown in fig. 6, in one embodiment, the OLED driving circuits 1 and 2 shown in fig. 3 further include a storage capacitor C1, a third switching element Q3, a fourth switching element Q4, a fifth switching element Q5, and a sixth switching element Q6;
a first end of the storage capacitor C1 is used for receiving a power supply signal VDD, and a second end of the storage capacitor C1 is electrically connected with a first end of the third switching element Q3 and a controlled end of the fourth switching element Q4;
a controlled terminal of the third switching element Q3 and a controlled terminal of the fifth switching element Q5 are used for receiving the nth-stage scan signal GN, and a second terminal of the third switching element Q3 is electrically connected to a first terminal of the second switching element Q2, a first terminal of the fourth switching element Q4 and a first terminal of the sixth switching element Q6;
a second terminal of the fourth switching element Q4 is electrically connected to a second terminal of the first switching element Q1 and a first terminal of the fifth switching element Q5;
a second terminal of the fifth switching element Q5 is used for receiving the DATA signal DATA;
the controlled terminal of the sixth switching element Q6 is used for receiving the reset signal RST, and the second terminal of the sixth switching element Q6 is used for receiving the reference voltage signal VINI.
Fig. 6 schematically shows a structure diagram of the OLED driving circuit 1 in the H region on the left side, and schematically shows a structure diagram of the OLED driving circuit 2 in the L region on the right side; wherein all switching elements are illustrated as transistors.
In application, the first level in the embodiment corresponding to fig. 6 is a low level, and the parasitic element is a parasitic element between the second end of the fourth switching element and the first end of the second switching element.
Fig. 7 exemplarily shows a timing diagram of the first control signal EM1, the reset signal RST, the nth stage scan signal GN, and the second control signal EM2 in fig. 6; wherein the lag time of the low level of the second control signal EM2 with respect to the low level of the first control signal EM1 is denoted as Δ t.
It should be understood that the structure of the OLED driving circuit shown in fig. 4 and fig. 6 is merely exemplary, and in practical applications, the structure of the OLED driving circuit provided in the embodiments of the present application may also be any other specific structure including the basic structure shown in fig. 3.
In one embodiment, the processor of the terminal device 100 is electrically connected to the first control signal terminal and the second control signal terminal of each OLED driving circuit 1 and 2, respectively;
the processor is configured to:
outputting a first level of the first control signal to first control signal ends of all the OLED driving circuits so that the power supply signal charges all the parasitic elements;
and after the parasitic element is fully charged, outputting the first level of the second control signal to the second control signal end of all the OLED driving circuits, so that the power supply signal drives all the OLEDs to be lightened simultaneously.
In application, the OLED driving circuit can be directly controlled by a processor of the terminal device, and can also be indirectly controlled by the processor through a screen driving board of a display screen.
The embodiment of the present application further provides an OLED driving method implemented based on the terminal device 100, including the following steps executed by a processor:
outputting a first level of the first control signal to first control signal ends of all the OLED driving circuits so that the power supply signal charges all the parasitic elements;
and after the parasitic element is fully charged, outputting the first level of the second control signal to the second control signal end of all the OLED driving circuits, so that the power supply signal drives all the OLEDs to be lightened simultaneously.
The embodiment of the present application also provides a computer-readable storage medium, which stores a computer program, and the computer program, when executed by a processor, implements the steps of the OLED driving method.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. An OLED driving circuit is applied to a terminal device with different pixel density areas, and comprises a first switching element and a second switching element;
the controlled end of the first switch element is used for accessing a first control signal, the first end of the first switch element is used for accessing a power supply signal, the second end of the first switch element is electrically connected with the first end of the second switch element, and the second end of the first switch element and the first end of the second switch element are provided with parasitic elements;
the controlled end of the second switch element is used for accessing a second control signal, the second end of the second switch element is used for being electrically connected with the anode of one OLED, and when the OLED driving circuit is positioned in a low pixel density area, the second switch element is far away from the first switch element and is close to the anode of the OLED;
the first switch element is used for conducting when a first level of a first control signal is switched in, so that the power supply signal charges the parasitic element;
the second switch element is used for being switched on when the parasitic element is fully charged and then is switched in the first level of the second control signal, so that the power supply signal drives the OLED to be lightened;
wherein a lag time of the first level of the second control signal with respect to the first level of the first control signal is greater than or equal to a charging time required for the parasitic element located in the low pixel density region.
2. The OLED drive circuit of claim 1, wherein the second switching element is disposed below an anode of the OLED when the OLED is in the low pixel density region.
3. The OLED drive circuit according to claim 1 or 2, further comprising a storage capacitor, a third switching element, a fourth switching element, a fifth switching element, a sixth switching element, and a seventh switching element;
the first end of the storage capacitor is used for accessing the power supply signal, and the second end of the storage capacitor is electrically connected with the controlled end of the fourth switching element, the first end of the fifth switching element and the first end of the sixth switching element;
a controlled terminal of the third switching element, a controlled terminal of the fifth switching element, and a controlled terminal of the seventh switching element are used for receiving an nth-level scan signal, a first terminal of the third switching element is used for receiving a data signal, and a second terminal of the third switching element is electrically connected to the first terminal of the first switching element and the first terminal of the fourth switching element;
a second terminal of the fourth switching element is electrically connected to a second terminal of the fifth switching element and a first terminal of the second switching element;
the controlled end of the sixth switching element is used for accessing an N-1 level scanning signal, and the second end of the sixth switching element and the first end of the seventh switching element are used for accessing a reference voltage signal;
a second terminal of the seventh switching element is electrically connected to a second terminal of the second switching element.
4. The OLED drive circuit according to claim 3, wherein the first level is a low level, and the parasitic element is a parasitic element between the second terminal of the fourth switching element and the first terminal of the second switching element.
5. The OLED drive circuit according to claim 1 or 2, further comprising a storage capacitor, a third switching element, a fourth switching element, a fifth switching element, and a sixth switching element;
the first end of the storage capacitor is used for accessing the power supply signal, and the second end of the storage capacitor is electrically connected with the first end of the third switching element and the controlled end of the fourth switching element;
a controlled end of the third switching element and a controlled end of the fifth switching element are used for accessing an nth-level scanning signal, and a second end of the third switching element is electrically connected with a first end of the second switching element, a first end of the fourth switching element and a first end of the sixth switching element;
a second terminal of the fourth switching element is electrically connected to a second terminal of the first switching element and a first terminal of the fifth switching element;
a second end of the fifth switching element is used for accessing a data signal;
and the controlled end of the sixth switching element is used for accessing a reset signal, and the second end of the sixth switching element is used for accessing a reference voltage signal.
6. The OLED driving circuit according to claim 5, wherein the first level is a low level, and the parasitic element is a parasitic element between the second terminal of the fourth switching element and the first terminal of the second switching element.
7. A terminal device comprising regions of different pixel density, a plurality of OLEDs, and a plurality of OLED drive circuits according to any of claims 1 to 6, one said OLED being electrically connected to one said OLED drive circuit.
8. The terminal device of claim 7, further comprising a processor;
the processor is respectively and electrically connected with the first control signal end and the second control signal end of each OLED driving circuit;
the processor is configured to:
outputting a first level of the first control signal to first control signal ends of all the OLED driving circuits so that the power supply signal charges all the parasitic elements;
and after the parasitic element is fully charged, outputting the first level of the second control signal to second control signal ends of all the OLED driving circuits, so that the power supply signal drives all the OLEDs to be lightened simultaneously.
9. An OLED driving method implemented on the basis of the terminal device as claimed in claim 8, comprising the following steps executed by the processor:
outputting a first level of the first control signal to first control signal ends of all the OLED driving circuits so that the power supply signal charges all the parasitic elements;
and after the parasitic element is fully charged, outputting the first level of the second control signal to second control signal ends of all the OLED driving circuits, so that the power supply signal drives all the OLEDs to be lightened simultaneously.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the OLED driving method according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010827042.8A CN111883059B (en) | 2020-08-17 | 2020-08-17 | OLED driving circuit, method, terminal device and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010827042.8A CN111883059B (en) | 2020-08-17 | 2020-08-17 | OLED driving circuit, method, terminal device and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111883059A CN111883059A (en) | 2020-11-03 |
| CN111883059B true CN111883059B (en) | 2021-05-11 |
Family
ID=73202301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010827042.8A Active CN111883059B (en) | 2020-08-17 | 2020-08-17 | OLED driving circuit, method, terminal device and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111883059B (en) |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003167551A (en) * | 2001-11-28 | 2003-06-13 | Internatl Business Mach Corp <Ibm> | Method for driving pixel circuits, pixel circuits and el display device and driving control device using the same |
| CN1492721A (en) * | 2002-10-22 | 2004-04-28 | Driving circuit and system of organic film electric driven luminous module | |
| US20160063921A1 (en) * | 2014-08-26 | 2016-03-03 | Apple Inc. | Organic Light-Emitting Diode Display With Reduced Capacitive Sensitivity |
| KR20160055546A (en) * | 2014-11-10 | 2016-05-18 | 삼성디스플레이 주식회사 | Organic light emitting diode display |
| KR102289838B1 (en) * | 2015-04-28 | 2021-08-13 | 삼성디스플레이 주식회사 | Organic light emitting diode display |
| JP6510144B2 (en) * | 2016-03-28 | 2019-05-08 | アップル インコーポレイテッドＡｐｐｌｅ Ｉｎｃ． | Light emitting diode display |
| EP3264407A1 (en) * | 2016-06-30 | 2018-01-03 | LG Display Co., Ltd. | Organic light emitting display device and driving method of the same |
| KR102448030B1 (en) * | 2017-09-21 | 2022-09-28 | 삼성디스플레이 주식회사 | Display apparatus |
| CN108732841A (en) * | 2018-05-31 | 2018-11-02 | 厦门天马微电子有限公司 | A kind of display panel and preparation method thereof, display device |
| CN109166520A (en) * | 2018-09-19 | 2019-01-08 | 云谷（固安）科技有限公司 | Have the driving circuit, display screen and display equipment of reeded display panel |
| CN109584808B (en) * | 2018-12-11 | 2020-06-16 | 武汉华星光电半导体显示技术有限公司 | Pixel driving circuit, display device and driving method |
| CN209045560U (en) * | 2018-12-25 | 2019-06-28 | 陕西坤同半导体科技有限公司 | Electronic equipment |
| CN110364109A (en) * | 2019-07-29 | 2019-10-22 | 京东方科技集团股份有限公司 | A kind of display panel and display device |
-
2020
- 2020-08-17 CN CN202010827042.8A patent/CN111883059B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN111883059A (en) | 2020-11-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11239436B2 (en) | Display apparatus and electronic apparatus | |
| US11462592B2 (en) | Array substrate with pixel circuits sharing voltage control circuit, driving method, organic light emitting display panel and display device | |
| US20230215348A1 (en) | Pixel circuit and driving method thereof, display panel | |
| US9318047B2 (en) | Organic light emitting display unit structure and organic light emitting display unit circuit | |
| CN109712565B (en) | Pixel circuit, driving method thereof and electroluminescent display panel | |
| US10181283B2 (en) | Electronic circuit and driving method, display panel, and display apparatus | |
| CN111785209B (en) | Display panel, driving method thereof and display device | |
| WO2018184514A1 (en) | Pixel compensation circuit, driving method, organic light emitting display panel and display device | |
| CN113838419A (en) | Pixel circuit, driving method thereof and display panel | |
| US8723183B2 (en) | Image display system having pixels with common electrodes | |
| CN110867162B (en) | Pixel driving circuit, driving method thereof and display panel | |
| US20220366848A1 (en) | Display substrate and display panel | |
| CN112735322A (en) | GIP circuit and driving method | |
| CN111883059B (en) | OLED driving circuit, method, terminal device and storage medium | |
| CN111383598A (en) | Pixel compensation circuit, control method thereof, display driving device and display equipment | |
| US8476628B2 (en) | Device using oxide semiconductor, display device, and electronic apparatus | |
| WO2022222151A1 (en) | Display substrate, display panel, and display device | |
| CN112908253B (en) | Display panel, driving control method thereof and display device | |
| US11468861B2 (en) | Display panel and driving method, and display device | |
| WO2022067877A1 (en) | Pixel driving circuits and driving method thereof, and display substrate and display apparatus | |
| WO2023201470A1 (en) | Pixel circuit and driving method thereof, display panel, and display device | |
| US9099032B2 (en) | Light-emitting panel, display device and electronic equipment | |
| CN116490912A (en) | Display panel and display device | |
| CN117219008A (en) | Pixel driving circuit and display panel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |