CN111583871A - Pixel driving circuit, display panel and electronic device - Google Patents
Pixel driving circuit, display panel and electronic device Download PDFInfo
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- CN111583871A CN111583871A CN202010456406.6A CN202010456406A CN111583871A CN 111583871 A CN111583871 A CN 111583871A CN 202010456406 A CN202010456406 A CN 202010456406A CN 111583871 A CN111583871 A CN 111583871A
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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
- G09G3/3233—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 with pixel circuitry controlling the current through the light-emitting element
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Abstract
The embodiment of the application provides a pixel driving circuit, a display panel and an electronic device. The light-emitting control unit is arranged between the analog pixel driving circuit and the light-emitting device, and the light-emitting duration of the light-emitting device is controlled through the light-emitting control unit, so that the light-emitting brightness can be kept unchanged under the condition of increasing the data voltage for generating the driving current. Therefore, by adopting the pixel driving circuit provided by the embodiment of the application, the range of the data voltage corresponding to the gray scales can be increased to increase the difference value of the data voltage between the gray scales, so that the problem of uneven light emission between the light-emitting devices on the display panel caused by the difference of the threshold voltages of the transistors can be avoided, the problem of larger change of the gray scales due to the small change of the data voltage can be avoided, the problem of larger change of the light-emitting device light-emitting brightness can be avoided, and the light-emitting stability of the light-emitting device and the brightness uniformity of the display panel can be improved.
Description
Technical Field
The embodiment of the application relates to the technical field of display, in particular to a pixel driving circuit, a display panel and an electronic device.
Background
The pixel driving circuit of the display panel includes an analog pixel driving circuit and a digital pixel driving circuit. The principle of the analog pixel driving circuit is as follows: since the current flowing through the driving transistor is in one-to-one correspondence with the display gray scale and the current flowing through the driving transistor is related to the data voltage, display of the corresponding gray scale can be achieved by controlling the data voltage representing the gray scale.
Specifically, for the analog pixel driving circuit, the driving transistor operates in a saturation region, and the gate-source voltage of the driving transistor is controlled, so that the current of the transistor in the saturation region, that is, the current flowing through the light emitting device is controlled, and the display brightness is controlled.
In which the threshold voltage of the driving transistor of each sub-pixel may be different due to manufacturing differences. Particularly, when displaying a low gray scale, the data voltage is small, the gate-source voltage difference of the driving transistor is small, and the difference of the threshold voltage of the driving transistor is sensitive, so that even if the same data voltage is applied to the driving transistor of each sub-pixel, the current flowing into the Organic Light Emitting Diode (OLED) is not uniform, and the display brightness of the display panel is not uniform.
Disclosure of Invention
The embodiment of the application provides a pixel driving circuit, a display panel and an electronic device, so that the light emitting stability of a light emitting device and the brightness uniformity of the display panel are improved.
In a first aspect, an embodiment of the present application provides a pixel driving circuit, including:
an analog pixel driving circuit and a light emission control unit;
the first end of the analog pixel driving circuit is connected with a first voltage source, the second end of the analog pixel driving circuit is connected with the first end of the light-emitting control unit, the second end of the light-emitting control unit is connected with the first end of the light-emitting device, and the second end of the light-emitting device is connected with a second voltage source;
the analog pixel driving circuit is used for providing driving current for the light-emitting device under the control of data voltage and the first voltage source voltage;
and the light-emitting control unit is used for controlling the light-emitting duration of the light-emitting device according to the magnitude of the data voltage on the basis of determining the light-emitting brightness of the light-emitting device.
Optionally, the light emission control unit includes: a first transistor unit, a second transistor unit and a storage capacitor unit;
the control end of the first transistor unit is connected with a first scanning line, the first end of the first transistor unit is connected with a third voltage source, the second end of the first transistor unit is connected with the control end of the second transistor unit, the first end of the second transistor unit is connected with the analog pixel driving circuit, and the second end of the second transistor unit is connected with the light-emitting device; a first end of the storage capacitor unit is connected with the first voltage source, and a second end of the storage capacitor unit is connected with a control end of the second transistor unit;
the third voltage source is configured to provide a first voltage and a second voltage having different voltage values, wherein the first voltage is used to control the second transistor unit to make the light emitting device emit light, and the second voltage is used to control the second transistor unit to make the light emitting device not emit light;
the first transistor unit is used for transmitting the first voltage to the control end of the second transistor unit when the first transistor unit is conducted for the first time under the action of scanning voltage provided by the first scanning line, and transmitting the second voltage to the control end of the second transistor unit when the first transistor unit is conducted for the second time, wherein the time interval between the second conduction and the first conduction is related to the magnitude of the data voltage on the basis of determination of the light-emitting brightness of the light-emitting device;
the storage capacitor unit is used for maintaining the stability of the voltage at the control end of the second transistor unit when the first transistor unit is in an off-to-state;
the second transistor unit is configured to control the light emitting device to emit light between receiving the first voltage and receiving the second voltage, and control the light emitting device not to emit light between receiving the second voltage and receiving the first voltage next time.
Optionally, the first transistor unit includes a P-type thin film transistor, and/or the second transistor unit includes a P-type thin film transistor.
Optionally, the storage capacitor unit includes a storage capacitor.
Optionally, the light emission control unit includes: a third transistor unit and a fourth transistor unit;
the control end of the third transistor unit is connected with the second scanning line, the first end of the third transistor unit is connected with a fourth voltage source, the second end of the third transistor unit is connected with the control end of the fourth transistor unit, the first end of the fourth transistor unit is connected with the analog pixel driving circuit, and the second end of the fourth transistor unit is connected with the light-emitting device;
the fourth voltage source is used for providing a third voltage, and the third voltage is used for controlling the fourth transistor unit to enable the light-emitting device to emit light;
the third transistor unit is configured to be in an on state when the second scan line provides a scan voltage, transmit the third voltage to the control terminal of the fourth transistor unit, and be in an off state when the second scan line stops providing the scan voltage, and stop transmitting the third voltage to the control terminal of the fourth transistor unit, where a duration of providing the scan voltage by the second scan line is related to a magnitude of the data voltage on the basis of determination of light emission brightness of the light emitting device;
the fourth transistor unit is configured to control the light emitting device to emit light during a time period when the third voltage is received, and control the light emitting device not to emit light during a time period when the third voltage is not received.
Optionally, the third transistor unit includes a P-type thin film transistor, and/or the fourth transistor unit includes a P-type thin film transistor.
Optionally, the light emission control unit includes: a fifth transistor unit;
the control end of the fifth transistor unit is connected with a fifth voltage source, the first end of the fifth transistor unit is connected with the analog pixel driving circuit, and the second end of the fifth transistor unit is connected with the light-emitting device;
the fifth voltage source provides a fourth voltage and a fifth voltage with different voltage values, the fourth voltage is used for controlling the fifth transistor unit to enable the light-emitting device to emit light, the fifth voltage is used for controlling the fifth transistor unit to enable the light-emitting device not to emit light, and the time interval between the fifth voltage source and the fifth voltage is adjusted to be output by the fourth voltage on the basis of the determination of the light-emitting brightness of the light-emitting device is related to the magnitude of the data voltage;
and the fifth transistor unit is used for controlling the light-emitting device to emit light in a time period for receiving the fourth voltage, and controlling the light-emitting device not to emit light in a time period for receiving the fifth voltage.
Optionally, the fifth transistor unit includes a P-type thin film transistor or an N-type thin film transistor.
In a second aspect, an embodiment of the present application provides a display panel, including the pixel driving circuit described in the first aspect and any possible implementation manner of the embodiment of the present application, where the pixel driving circuit includes a scan voltage input terminal and a data voltage input terminal; the display panel further includes: the scanning driving circuit, the data driving circuit, a plurality of scanning lines and a plurality of data lines; the port of the scanning driving circuit is electrically connected with the plurality of scanning lines; the scanning voltage input end of the pixel driving circuit is electrically connected with a scanning line, and the data voltage input end of the pixel driving circuit is electrically connected with a data line.
In a third aspect, an embodiment of the present application provides a terminal device, which includes a processing device, a storage device, and the display panel according to the second aspect of the embodiment of the present application.
The embodiment of the application provides a pixel driving circuit, a display panel and an electronic device. The light-emitting control unit is arranged between the analog pixel driving circuit and the light-emitting device, and the light-emitting duration of the light-emitting device is controlled through the light-emitting control unit, so that the light-emitting brightness can be kept unchanged under the condition of increasing the data voltage for generating the driving current. Therefore, by adopting the pixel driving circuit provided by the embodiment of the application, the range of the data voltage corresponding to the gray scales can be increased to increase the difference value of the data voltage between the gray scales, so that the problem of uneven light emission between the light-emitting devices on the display panel caused by the difference of the threshold voltages of the transistors can be avoided, the problem of larger change of the gray scales due to the small change of the data voltage can be avoided, the problem of larger change of the light-emitting device light-emitting brightness can be avoided, and the light-emitting stability of the light-emitting device and the brightness uniformity of the display panel can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a pixel driving circuit according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a pixel driving circuit according to another embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a pixel driving circuit according to another embodiment of the present disclosure;
FIG. 4 is a timing diagram of a frame time corresponding to the pixel driving circuit shown in FIG. 3;
fig. 5 is a schematic structural diagram of a pixel driving circuit according to another embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a pixel driving circuit according to another embodiment of the present disclosure
FIG. 7 is a timing diagram of a frame time corresponding to the pixel driving circuit shown in FIG. 6
Fig. 8 is a schematic structural diagram of a pixel driving circuit according to another embodiment of the present disclosure;
fig. 9 is a schematic structural diagram of a pixel driving circuit according to another embodiment of the present disclosure;
FIG. 10 is a timing diagram of a frame time corresponding to the pixel driving circuit shown in FIG. 9;
fig. 11 is a schematic structural diagram of a pixel driving circuit according to another embodiment of the present disclosure;
fig. 12 is a schematic structural diagram of a pixel driving circuit according to another embodiment of the present disclosure;
fig. 13 is a schematic structural diagram of a pixel driving circuit according to another embodiment of the present application;
fig. 14 is a schematic structural diagram of a display panel according to an embodiment of the present application;
fig. 15 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the analog pixel driving circuit provided in the prior art, on one hand, for a plurality of sub-pixels on a display panel, due to manufacturing differences, the threshold voltage of the driving transistor of each sub-pixel may be different. Particularly, when displaying a low gray scale, the data voltage is small, the gate-source voltage difference of the driving transistor is small, and the driving transistor is sensitive to the difference of the threshold voltage of the transistor, so that even if the same data voltage is applied to the driving transistor of each sub-pixel, the driving current flowing into the Organic Light Emitting Diode (OLED) is not uniform, which causes the display luminance of the display panel to be non-uniform. On the other hand, for the same sub-pixel, when displaying a low gray scale, the data voltage is small, the gate-source voltage difference of the driving transistor is small, when the data voltage slightly changes, the driving current on the driving transistor slightly changes, and when the driving current slightly changes due to displaying a low gray scale, the light emitting zero degree of the OLED also greatly changes, so that the light emitting of the OLED is unstable.
The present application therefore proposes the following inventive concepts: the light emitting luminance of the light emitting device is related to the light emitting duration and the current density of the driving current, and therefore, the light emitting duration and the current density of the driving current are in an inverse relationship with each other without changing the light emitting luminance. Therefore, the luminance display of the display panel can be realized by controlling the light emitting time period or the current density of the driving current. The digital pixel driving circuit of the display screen realizes different gray scale display by controlling the length of the light emitting time. Therefore, the analog pixel driving circuit and the digital pixel driving circuit can be combined, namely the pixel driving circuit is designed by combining an analog mode and a digital mode, and the brightness control of the display panel is realized. Specifically, the principle of a digital pixel driving circuit is applied to control the light emitting duration of the light emitting device, and if the display brightness is not changed, the current density of the driving current is increased, and the data voltage is increased, so that the gate-source voltage difference of the driving transistor is increased, the sensitivity to the threshold voltage change of the transistor is reduced, and the uniformity and the stability of the brightness of the display screen are improved.
The following describes the technical solution of the present application with specific examples.
Fig. 1 is a schematic structural diagram of a pixel driving circuit according to an embodiment of the present disclosure. As shown in fig. 1, the pixel driving circuit includes: an analog pixel driving circuit 1100 and a light emission control unit 1200.
For the pixel driving circuit shown in fig. 1, the circuit structure is:
a first terminal of the analog pixel driving circuit 1100 is connected to a first voltage source VDD, a second terminal of the analog pixel driving circuit 1100 is connected to a first terminal of the light-emitting control unit 1200, a second terminal of the light-emitting control unit 1200 is connected to an anode of the light-emitting device L, and a cathode of the light-emitting device L is connected to a second voltage source VSS. It should be noted that the analog pixel driving circuit 1100 in the embodiment of the present application may be any analog pixel driving circuit, such as a 2T1C pixel driving circuit and a 7T1C pixel driving circuit, which is not limited in the embodiment of the present application.
As is known from the principle of the analog pixel driving circuit, the analog pixel driving circuit 1100 is used to generate a driving current, thereby causing the light emitting device to emit light. Specifically, the display device is marked as a first gray scale according to a gray scale to be displayed, a Data voltage Data corresponding to the first gray scale is provided to the analog pixel driving circuit 1100 through a Data line, and the analog pixel driving circuit 1100 is further connected to a first voltage source VDD, so that a driving current is generated under the action of the Data voltage and the voltage provided by the voltage source VDD, and if the driving current is applied to the light emitting device L, the luminance of the light emitting element L corresponds to the first gray scale. The magnitude of the driving current is in direct proportion to the Data voltage Data.
For the embodiment of the present application, since the analog pixel driving circuit 1100 is connected to the light emitting device L through the light emitting control unit 1200, whether the light emitting device L emits light and the duration of light emission are also controlled by the light emitting control unit 1200, that is, when the analog pixel driving circuit 1100 generates a driving current, if the light emitting control unit 1200 is turned on, the driving current can flow through the light emitting device L, and the light emitting device L emits light; if the light emission control unit 1200 is not turned on, there is no driving current on the light emitting device L, and the light emitting device L does not emit light. Also, the duration of light emission of the light emitting device may be controlled by controlling the duration of on of the light emission control unit 1200. Accordingly, light emission of the light emitting device is controlled by the analog pixel driving circuit 1100 and the light emission control unit 1200 in cooperation.
When the light emitting device emits light, the gray scales correspond to the data voltages one by one, and the displayed gray scales are adjusted by adjusting the data voltages. When the gray scale is expanded, the expansion is carried out in a certain data voltage range, for example, the 0-255 gray scale should be expanded in the 0-3V data voltage range, and when the 0-255 gray scale is expanded in the 0-5V data voltage range, the difference value of the data voltage between the gray scales is increased, so that the problem of uneven light emission between the light-emitting devices L on the display panel caused by the difference of the threshold voltages of the transistors is avoided, the problem of larger gray scale change caused by the slight change of the data voltage, so that the light-emitting brightness change of the light-emitting devices L is larger is also avoided, and the light-emitting stability of the light-emitting devices L and the brightness uniformity of the display panel are improved. However, since the data voltage range is increased, the data voltage corresponding to each gray scale is also increased, and the luminance of light emitted from the light emitting device L is related to the data voltage, which causes the luminance of light emitted from the light emitting device L to be different from the luminance of light to be emitted, i.e., the gray scale to be displayed is not identical to the gray scale to be displayed. Therefore, the luminance of the light emitted from the light emitting device L is controlled by controlling the light emitting period of the light emitting device L by the light emission control unit 1200 in the present embodiment.
Since the range of the data voltage is increased, the data voltage corresponding to each gray scale is increased, so that the luminance of the light emitting device L is increased, and if the luminance of the light emitting device L is not changed, the light emitting control unit 1200 may reduce the light emitting duration of the light emitting device L, so that the luminance of the light emitting device L is not changed. Under the condition that the light emitting brightness of the light emitting device L is not changed, the actual light emitting duration of the light emitting device L is related to the data voltage, and the larger the data voltage is, the shorter the actual light emitting duration of the light emitting device L is. That is, the light emitting luminance of the light emitting device L is constant, and the light emitting control unit 1200 controls the light emitting time period of the light emitting device L by the magnitude of the data voltage.
According to the embodiment of the application, the light-emitting control unit is arranged between the analog pixel driving circuit and the light-emitting device, and the light-emitting duration of the light-emitting device is controlled through the light-emitting control unit, so that the light-emitting brightness can be kept unchanged under the condition of increasing the data voltage for generating the driving current. Therefore, by adopting the pixel driving circuit provided by the embodiment of the application, the range of the data voltage corresponding to the gray scales can be increased to increase the difference value of the data voltage between the gray scales, so that the problem of uneven light emission between the light-emitting devices on the display panel caused by the difference of the threshold voltages of the transistors can be avoided, the problem of larger change of the gray scales due to the small change of the data voltage can be avoided, the problem of larger change of the light-emitting device light-emitting brightness can be avoided, and the light-emitting stability of the light-emitting device and the brightness uniformity of the display panel can be improved.
On the basis of the embodiment shown in fig. 1, as shown in fig. 2, the light emission control unit 1200 includes: a first transistor unit 210, a second transistor unit 220, and a storage capacitor unit 230.
For the circuit shown in fig. 2, the circuit connection relationship is as follows:
the control terminal of the first transistor unit 210 is connected to the first scan line S-R, and the first transistor unit 210 is controlled to be turned on and off by a voltage on the scan line S-R, the first terminal of the first transistor unit 210 is connected to the third voltage source ofs1, and the second terminal of the first transistor unit 210 is connected to the control terminal of the second transistor unit 220, so that the voltage of the voltage source ofs1 is supplied to the control terminal of the second transistor unit 220 when the first transistor unit 210 is turned on. The first terminal of the second transistor unit 220 is connected to the analog pixel driving circuit 1100, and the second terminal of the second transistor unit 220 is connected to the anode of the light emitting device L, so that when the second transistor unit 220 is turned on, a driving current flows through the light emitting device L. A first terminal of the storage capacitor unit 230 is connected to the first voltage source VDD, and a second terminal of the storage capacitor unit 230 is connected to the control terminal of the second transistor unit 220. It should be noted that, the connection to the first terminal of the first transistor unit 210 may also be a control terminal, and the control terminal may output two control signals with different voltage values.
For the circuit shown in fig. 2, the operating principle is as follows:
the analog pixel driving circuit 1100 generates a driving current under the action of the adjusted data voltage, wherein the adjusted data voltage is different from the data voltage corresponding to the brightness of the light to be emitted from the light emitting device L, and therefore, after the driving current corresponding to the adjusted data voltage flows through the light emitting device L, the luminance of the light emitting device L is different from the brightness of the light to be emitted from the light emitting device L. In order to ensure that the luminance of the light emitting device L is the same as the luminance of the light to be emitted by the light emitting device L, the light emitting duration of the light emitting device L needs to be adjusted.
Specifically, when the voltage on the scan line S-R controls the conduction of the first transistor unit 210, the voltage source ofs1 provides the first voltage to the control terminal of the second transistor unit 220 through the first transistor unit 210, and the second transistor unit 220 is turned on by the first voltage, so that the driving current flows to the light emitting device L through the second transistor unit 220, and the light emitting device L emits light.
After the light emitting device L emits light, the voltage on the scan line S-R controls the turn-off of the first transistor unit 210, and the voltage source ofs1 cannot supply the first voltage to the control terminal of the second transistor unit 220. However, since the storage capacitor unit 230 is connected between the voltage source VDD and the control terminal of the second transistor unit 220, when the voltage source ofs1 supplies the first voltage to the control terminal of the second transistor unit 220, the storage capacitor unit 230 stores the capacitor, and when the voltage source ofs1 cannot supply the first voltage to the control terminal of the second transistor unit 220, the storage capacitor unit 230 maintains the voltage of the control terminal of the second transistor unit 220 stable, so that the second transistor unit 220 is kept turned on, and the light emitting device L continuously emits light.
Since the driving current does not correspond to the luminance of the light to be emitted from the light emitting device L, the light emitting duration of the light emitting device L can be adjusted so that the luminance of the light emitting device L is the same as the luminance of the light to be emitted. Specifically, when the brightness of the light to be emitted from the light emitting device L is determined, the time point when the first transistor unit 210 is turned on again is determined according to the adjusted data voltage, and after the first transistor unit 210 is turned on again, the voltage source ofs1 supplies a second voltage, which is different from the first voltage and is greater than the voltage of the voltage source VDD, to the control terminal of the second transistor unit 220 through the first transistor unit 210, and the second transistor unit 220 is turned off by the second voltage, so that no driving current flows through the light emitting device L, and the light emission is stopped.
When the first transistor unit 210 is turned off again, the voltage of the control terminal of the second transistor unit 220 is maintained to be stable by the storage capacitor unit 230, so that the second transistor unit 220 is kept turned off and the light emitting device L does not emit light.
In the embodiment of the application, when the first transistor unit is turned on for the first time, the first voltage controls the second transistor unit to be turned on, and at the moment, the light-emitting device emits light; when the first transistor unit is turned on for the second time, the second voltage controls the second transistor unit to be turned off, at this time, the light emitting device does not emit light, and between the two times of turning on of the first transistor unit, the light emitting device emits light. Therefore, the luminous duration of the light-emitting device can be controlled by controlling the time point of the second conduction of the first transistor unit, namely controlling the duration between the two conduction of the first transistor unit, so that the range of data voltage corresponding to gray scales can be increased, the difference value of the data voltage between the gray scales can be increased, the problem of uneven light emission between the light-emitting devices on the display panel caused by the difference of threshold voltages of the transistors can be avoided, the problem that the change of the gray scales is larger due to the small change of the data voltage can also be avoided, and the problem that the change of the luminous brightness of the light-emitting devices is larger can be solved, and the luminous stability of the light-emitting devices and the brightness uniformity of.
Fig. 3 is a schematic structural diagram of a pixel driving circuit according to another embodiment of the present disclosure. As shown in fig. 3, the first transistor unit 210 includes a P-type thin film transistor, denoted as a first light emission controlling transistor T4, and the second transistor unit 220 includes a P-type thin film transistor, denoted as a second light emission controlling transistor T3. The storage capacitor unit 230 includes a capacitor, denoted as storage capacitor C1. In fig. 3, the analog pixel driving circuit 1100 employs a 2T1C pixel driving circuit.
For the pixel driving circuit shown in fig. 3, the circuit structure is:
a control terminal of the switching transistor T1 is connected to the scan line S-L, a first terminal of the switching transistor T1 is connected to the Data line Data, a second terminal of the switching transistor T1 is connected to the control terminal of the driving transistor T2, a source of the driving transistor T2 is connected to the voltage source VDD, a drain thereof is connected to the first terminal of the second light emission controlling transistor T3, a second terminal of the second light emission controlling transistor T3 is connected to an anode of the light emitting device L, a control terminal of the second light emission controlling transistor T3 is connected to the second terminal of the first light emission controlling transistor T4, a first terminal of the first light emission controlling transistor T4 is connected to the voltage source ofs1, a control terminal of the first light emission controlling transistor T4 is connected to the scan line S-R, and a cathode of the light emitting device L is connected to the voltage. The storage capacitor Cst is connected between the voltage source VDD and the control terminal of the driving transistor T2, and the storage capacitor C1 is connected between the voltage source VDD and the control terminal of the second emission control transistor T3.
The working principle of the pixel driving circuit in fig. 3 is:
fig. 4 is a timing diagram of a frame time corresponding to the pixel driving circuit shown in fig. 3. As shown in fig. 4, when the scan line S-L is-7V, the switching transistor T1 is turned on to adjust the range of the data voltage, which is adjusted to 0-5V in fig. 4. Therefore, according to the gray scale to be displayed, the data voltage corresponding to the gray scale to be displayed is determined within the range of the adjusted data voltage. When the scan line S-R is-10V, the first light emission controlling transistor T4 is turned on for the first time, the voltage source ofs1 supplies the first voltage of-7V to the control terminal of the second light emission controlling transistor T3 through the first light emission controlling transistor T4, the second light emission controlling transistor T3 is turned on, and the light emitting device L emits light.
Then, the voltage of the scan line S-R is 10V, the first light emission controlling transistor T4 is turned off, and the voltage at the control terminal of the second light emission controlling transistor T3 is maintained to be stable by the storage capacitor C1, so that the light emitting device L continues to emit light.
Since the driving current for driving the light emitting element L to emit light is the data voltage corresponding to the gray scale to be displayed, which is determined within the range of the adjusted data voltage, the light emitting luminance of the light emitting element L does not correspond to the gray scale to be displayed. Therefore, the light emitting duration of the light emitting device L is controlled so that the light emitting luminance of the light emitting element L corresponds to the gray scale to be displayed. Therefore, a time point at which the first light emission controlling transistor T4 is turned on for the second time is determined according to the gray scale to be displayed and the data voltage corresponding to the gray scale to be displayed, which is determined within the range of the adjusted data voltage.
After the first light emission controlling transistor T4 is turned on for the second time, the voltage source ofs1 supplies the second voltage of 7V to the control terminal of the second light emission controlling transistor T3 through the first light emission controlling transistor T4, and the second light emission controlling transistor T3 is turned off, so that the light emitting device L stops emitting light.
On the basis of the embodiment shown in fig. 1, as shown in fig. 5, the light emission control unit 1200 includes: a third transistor unit 510 and a fourth transistor unit 520.
For the circuit shown in fig. 5, the circuit connection relationship is as follows:
the control terminal of the third transistor unit 510 is connected to the scan line S-R, the third transistor unit 510 is controlled to be turned on and off by a voltage on the scan line S-R, the first terminal of the third transistor unit 510 is connected to a fourth voltage source ofs2, and the second terminal of the third transistor unit 510 is connected to the control terminal of the fourth transistor unit 520, so that the voltage of the voltage source ofs2 is supplied to the control terminal of the fourth transistor unit 520 when the third transistor unit 510 is turned on. The first terminal of the fourth transistor unit 520 is connected to the analog pixel driving circuit 1100, and the second terminal of the fourth transistor unit 520 is connected to the anode of the light emitting device L, so that when the fourth transistor unit 520 is turned on, a driving current flows through the light emitting device L.
For the circuit shown in fig. 5, the operating principle is:
the analog pixel driving circuit 1100 generates a driving current under the action of the adjusted data voltage, wherein the adjusted data voltage is different from the data voltage corresponding to the brightness of the light to be emitted from the light emitting device L, and therefore, after the driving current corresponding to the adjusted data voltage flows through the light emitting device L, the luminance of the light emitting device L is different from the brightness of the light to be emitted from the light emitting device L. In order to ensure that the luminance of the light emitting device L is the same as the luminance of the light to be emitted by the light emitting device L, the light emitting duration of the light emitting device L needs to be adjusted.
When the third transistor unit 510 is turned on under the control of the voltage on the scan line S-R, the voltage source ofs2 supplies a third voltage to the control terminal of the fourth transistor unit 520 through the third transistor unit 510, and the fourth transistor unit 520 is turned on under the control of the third voltage, so that the driving current flows to the light emitting device L through the second transistor unit 220, and the light emitting device L emits light. The voltage control of the third transistor unit 510 on the scan line S-R is continuously turned on, and the voltage source ofs2 continuously outputs the third voltage, so that the fourth transistor unit 520 is continuously turned on and the light emitting device L is continuously turned on.
Since the driving current does not correspond to the luminance of the light to be emitted from the light emitting device L, the light emitting duration of the light emitting device L can be adjusted so that the luminance of the light emitting device L is the same as the luminance of the light to be emitted. In this embodiment, since the voltage source ofs2 outputs the third voltage having one voltage value, the fourth transistor unit 520 is controlled to be turned on or off by controlling the third transistor unit 510 to be turned on and off. Specifically, when the brightness of the light to be emitted from the light emitting device L is determined, the on time of the third transistor unit 510 is determined according to the adjusted data voltage, and the on time of the third transistor unit 510 is controlled by the voltage provided on the scan line S-R.
After the third transistor unit 510 is turned off, the third voltage output from the voltage source ofs2 cannot be supplied to the control terminal of the fourth transistor unit 520 through the third transistor unit 510, so that the fourth transistor unit 520 is turned off, and thus, the driving current cannot flow to the light emitting device L, thereby stopping the light emitting device L from emitting light. Thus, under the action of the driving current and the light emitting duration of the light emitting device L, the luminance of the light emitted from the light emitting device L corresponds to the gray scale to be displayed.
In the embodiment of the application, when the third transistor unit is turned on, the voltage output by the fourth voltage source is provided for the fourth transistor unit, so that the fourth transistor unit is turned on, and the light emitting device emits light; when the third transistor unit is turned off, the voltage output from the fourth voltage source is supplied to the fourth transistor unit, the fourth transistor unit is turned off, and the light emitting device does not emit light. The third transistor unit is switched from on to off according to the data voltage, that is, when the third transistor unit is switched off after being switched on according to the data voltage, when the light emitting brightness of the light emitting device is determined, the light emitting duration of the light emitting device can be controlled by controlling the time point of switching off after the third transistor unit is switched on, so that the range of the data voltage corresponding to the gray scales can be increased, the difference of the data voltage between the gray scales is increased, the problem of uneven light emission among the light emitting devices on the display panel due to the difference of threshold voltages of the transistors is avoided, the problem of large change of the gray scales due to small change of the data voltage and large change of the light emitting brightness of the light emitting device is avoided, and the light emitting stability of the light emitting device and the uniformity of the brightness of the display panel are improved.
Fig. 6 is a schematic structural diagram of a pixel driving circuit according to another embodiment of the present disclosure. As shown in fig. 6, the third transistor unit 510 includes a P-type thin film transistor, denoted as a third emission control transistor T6, and the fourth transistor unit 520 includes a P-type thin film transistor, denoted as a second emission control transistor T5. In fig. 6, the analog pixel driving circuit 1100 employs a 2T1C pixel driving circuit.
For the pixel driving circuit shown in fig. 6, the circuit structure is:
a control terminal of the switching transistor T1 is connected to the scan line S-L, a first terminal of the switching transistor T1 is connected to the Data line Data, a second terminal of the switching transistor T1 is connected to the control terminal of the driving transistor T2, a source of the driving transistor T2 is connected to the voltage source VDD, a drain thereof is connected to the first terminal of the fourth light emission controlling transistor T5, a second terminal of the fourth light emission controlling transistor T5 is connected to an anode of the light emitting device L, a control terminal of the fourth light emission controlling transistor T5 is connected to the second terminal of the third light emission controlling transistor T6, a first terminal of the third light emission controlling transistor T6 is connected to the fourth voltage source ofs2, a control terminal of the third light emission controlling transistor T6 is connected to the scan line S-R, and a cathode of the light emitting device L is connected to the voltage source VSS.
The working principle of the pixel driving circuit in fig. 6 is:
fig. 7 is a timing diagram of a frame time corresponding to the pixel driving circuit shown in fig. 6. As shown in fig. 7, when the scan line S-L is-7V, the switching transistor T1 is turned on to adjust the range of the data voltage, which is adjusted to 0-5V in fig. 7. Therefore, according to the gray scale to be displayed, the data voltage corresponding to the gray scale to be displayed is determined within the range of the adjusted data voltage. When the scan line S-R is-10V, the third light emission controlling transistor T6 is turned on, the voltage source ofs2 supplies a third voltage of-7V to the control terminal of the fourth light emission controlling transistor T5 through the third light emission controlling transistor T6, the fourth light emission controlling transistor T5 is turned on, and the light emitting device L emits light. Wherein the third light emission controlling transistor T6 is continuously turned on by the voltage of-10V supplied from the scan line S-R.
The light emitting time period of the light emitting device is determined by the gray scale to be displayed by the light emitting device L and the data voltage generating the driving current, thereby determining the time for which the voltage supplied from the scan line S-R is adjusted from-10V to 10V. After the voltage supplied from the scan line S-R is adjusted from-10V to 10V, the third light emission controlling transistor T6 is turned off, so that the fourth voltage having a voltage value of-7V cannot be supplied to the control terminal of the fourth light emission controlling transistor T5, thereby turning off the fourth light emission controlling transistor T5 and stopping the light emission of the light emitting device L.
On the basis of the embodiment shown in fig. 1, as shown in fig. 8, the light emission control unit 1200 includes: and a fifth transistor unit 810.
For the circuit shown in fig. 8, the circuit connection relationship is as follows:
a control terminal of the fifth transistor unit 810 is connected to a fifth voltage source ofs3, a first terminal of the fifth transistor unit 810 is connected to the analog pixel driving circuit 1100, and a second terminal of the fifth transistor unit 810 is connected to the anode of the light emitting device L.
For the circuit shown in fig. 8, the operating principle is:
the analog pixel driving circuit 1100 generates a driving current under the action of the adjusted data voltage, wherein the adjusted data voltage is different from the data voltage corresponding to the brightness of the light to be emitted from the light emitting device L, and therefore, after the driving current corresponding to the adjusted data voltage flows through the light emitting device L, the luminance of the light emitting device L is different from the brightness of the light to be emitted from the light emitting device L. In order to ensure that the luminance of the light emitting device L is the same as the luminance of the light to be emitted by the light emitting device L, the light emitting duration of the light emitting device L needs to be adjusted.
The fourth and fifth voltages having different voltage values output through the voltage source ofs3 control the turn-on and turn-off of the fifth transistor unit 810. When the voltage source ofs3 outputs the fourth voltage, the fifth transistor unit 810 is turned on, the light emitting device L emits light, and the voltage source ofs3 continuously outputs the fourth voltage to the control terminal of the fifth transistor unit 810, so that the light emitting device L is continuously turned on.
Since the driving current does not correspond to the luminance of the light to be emitted from the light emitting device L, the light emitting duration of the light emitting device L can be adjusted so that the luminance of the light emitting device L is the same as the luminance of the light to be emitted. In this embodiment, the time for switching the fifth transistor unit 810 from on to off is controlled by controlling the time for which the voltage output from the voltage source ofs3 is adjusted from the fourth voltage to the fifth voltage, that is, the on-time of the fifth transistor unit 810 is controlled by controlling the time for which the voltage source ofs3 outputs the fourth voltage, thereby controlling the light emitting time of the light emitting device L. Therefore, under the action of the driving current and the light emitting duration, the brightness of the light emitted by the light emitting device L corresponds to the actual display gray scale, so that the range of data voltage corresponding to the gray scale can be increased, the difference value of the data voltage between the gray scales is increased, the problem of uneven light emission between the light emitting devices on the display panel caused by the difference of the threshold voltage of the transistor is solved, the problem of larger gray scale change and larger light emitting brightness change of the light emitting devices caused by the small change of the data voltage is solved, and the light emitting stability of the light emitting devices and the brightness uniformity of the display panel are improved.
In some embodiments, the fifth transistor unit 810 includes a P-type thin film transistor, or the fifth transistor unit 810 includes an N-type thin film transistor. Here, fig. 9 illustrates that the fifth transistor unit 810 includes a P-type thin film transistor, which is denoted as a fifth emission control transistor T7. In fig. 9, the analog pixel driving circuit 1100 employs a 2T1C pixel driving circuit.
For the pixel driving circuit shown in fig. 9, the circuit structure is:
a control terminal of the switching transistor T1 is connected to the scan line S-L, a first terminal of the switching transistor T1 is connected to the Data line Data, a second terminal of the switching transistor T1 is connected to the control terminal of the driving transistor T2, a source of the driving transistor T2 is connected to the voltage source VDD, a drain thereof is connected to a first terminal of the fifth light emission controlling transistor T7, a second terminal of the fifth light emission controlling transistor T7 is connected to the anode of the light emitting device L, and a control terminal of the fifth light emission controlling transistor T7 is connected to the fifth voltage source ofs 3.
The working principle of the pixel driving circuit in fig. 9 is:
fig. 10 is a timing diagram for one frame time corresponding to the pixel driving circuit shown in fig. 9. As shown in fig. 10, when the scan line S-L is-7V, the switching transistor T1 is turned on to adjust the range of the data voltage, which is adjusted to 0-5V in fig. 7. Therefore, according to the gray scale to be displayed, the data voltage corresponding to the gray scale to be displayed is determined within the range of the adjusted data voltage. The fifth voltage source ofs3 outputs the fourth voltage having a voltage value of-7, the fifth light emission controlling transistor T7 is turned on, and the light emitting device L emits light. The fifth voltage source ofs3 continuously outputs the fourth voltage with a voltage value of-7, so that the light emitting device L continuously emits light.
The light emitting period of the light emitting device is determined by the gray scale to be displayed by the light emitting device L and the data voltage generating the driving current, thereby determining a time point at which the fifth voltage source ofs3 outputs the fourth voltage adjusted to the fifth voltage, thereby controlling the on-period of the fifth light emission controlling transistor T7, that is, the light emitting period of the light emitting device L.
Note that the analog pixel driving circuit 1100 may be, for example, a compensation pixel driving circuit, and fig. 11 to 13 show pixel driving circuits when the analog pixel driving circuit 1100 is 7T1C, 5T2C, and 3T 1C. Here, the light emission control unit 1200 may have the structure shown in fig. 3, and the light emission control unit 1200 may also have the structure shown in fig. 6 or 9, which is not limited in the embodiment of the present application.
It should be noted that the type of the element in the circuit is not limited in this application, and the element in the drawings shown in this application may be replaced with another element or a combination of other elements as long as the replaced element can realize the function of the original element.
It should be noted that, when the light emitting device L displays a high gray scale, the corresponding data voltage is higher, and in this case, the data voltage may be a voltage corresponding to the gray scale to be displayed, rather than the adjusted data voltage. In this way, the light emission control unit 1200 may not function, that is, control the light emission period and the light emission luminance of the light emitting device L only by the analog pixel driving circuit 1100. When the light emitting device L displays a low gray scale, the data voltage corresponding to the low gray scale is small, so that the range of the data voltage can be increased, and the data voltage corresponding to the low gray scale is increased.
Fig. 14 is a schematic structural diagram of a display panel according to an embodiment of the present application, where the display panel includes a pixel driving circuit according to any embodiment of the present application. The pixel driving circuit includes a scan voltage input terminal S and a Data voltage input terminal Data. The display panel further includes: a scan driving circuit 1410, a data driving circuit 1420, a plurality of scan lines (S1, S2, S3, S4 … …), and a plurality of data lines (D1, D2, D3, D4 … …). The ports of the scan driving circuit 1410 are electrically connected to a plurality of scan lines, the scan voltage input terminal S of the pixel driving circuit 1420 is electrically connected to one scan line, and the Data voltage input terminal of the pixel driving circuit is electrically connected to one Data line.
It should be noted that the Data voltage input terminal Data and the scan voltage input terminal S of the pixel circuit for driving one sub-pixel are only schematically illustrated in the figure, and the ports of the pixel circuits for driving the other sub-pixels are similar to the sub-pixel and are not illustrated one by one here.
The display panel provided by the embodiment of the application has the same beneficial effects as the pixel driving circuit provided by any embodiment of the application.
Fig. 15 is a schematic structural diagram of a terminal Device according to an embodiment of the present disclosure, as shown in fig. 15, the terminal Device may include, but is not limited to, a mobile terminal such as a mobile phone, a notebook computer, a digital broadcast receiver, a Personal Digital Assistant (PDA), a tablet computer (PAD), a Portable Multimedia Player (PMP), a vehicle-mounted terminal (e.g., a car navigation terminal), and a fixed terminal such as a digital TV, a desktop computer, and the like. The terminal device shown in fig. 15 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present disclosure.
As shown in fig. 15, the terminal device may include a processing means (e.g., a central processing unit, a graphics processor, etc.) 1501 which may perform various appropriate actions and processes according to a program stored in a Read Only Memory (ROM) 1502 or a program loaded from a storage means 1508 into a Random Access Memory (RAM) 1503. In the RAM1503, various programs and data necessary for the operation of the terminal device are also stored. The processing device 1501, the ROM1502, and the RAM1503 are connected to each other by a bus 1504. An input/output (I/O) interface 1505 is also connected to bus 1504.
Generally, the following devices may be connected to I/O interface 1505: input devices 1506 including, for example, touch screens, touch pads, keyboards, mice, cameras, microphones, accelerometers, gyroscopes, etc.; a Display panel 1507 including, for example, a Liquid Crystal Display (LCD), an Organic Light Emitting Display (OLED), and the like; storage 1508 including, for example, magnetic tape, hard disk, etc.; and a communication device 1509. The communication device 1509 may allow the terminal device to perform wireless or wired communication with other devices to exchange data. While fig. 15 illustrates a terminal device having various means, it is to be understood that not all illustrated means are required to be implemented or provided. More or fewer devices may alternatively be implemented or provided.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media capable of storing program codes, such as Read-Only Memory (ROM), Random Access Memory (RAM), magnetic or optical disk, and the like.
Finally, it should be noted that: the above 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 or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A pixel driving circuit, comprising:
an analog pixel driving circuit and a light emission control unit;
the first end of the analog pixel driving circuit is connected with a first voltage source, the second end of the analog pixel driving circuit is connected with the first end of the light-emitting control unit, the second end of the light-emitting control unit is connected with the first end of the light-emitting device, and the second end of the light-emitting device is connected with a second voltage source;
the analog pixel driving circuit is used for providing driving current for the light-emitting device under the control of data voltage and the first voltage source voltage;
and the light-emitting control unit is used for controlling the light-emitting duration of the light-emitting device according to the magnitude of the data voltage on the basis of determining the light-emitting brightness of the light-emitting device.
2. The circuit according to claim 1, wherein the light emission control unit comprises: a first transistor unit, a second transistor unit and a storage capacitor unit;
the control end of the first transistor unit is connected with a first scanning line, the first end of the first transistor unit is connected with a third voltage source, the second end of the first transistor unit is connected with the control end of the second transistor unit, the first end of the second transistor unit is connected with the analog pixel driving circuit, and the second end of the second transistor unit is connected with the light-emitting device; a first end of the storage capacitor unit is connected with the first voltage source, and a second end of the storage capacitor unit is connected with a control end of the second transistor unit;
the third voltage source is configured to provide a first voltage and a second voltage having different voltage values, wherein the first voltage is used to control the second transistor unit to make the light emitting device emit light, and the second voltage is used to control the second transistor unit to make the light emitting device not emit light;
the first transistor unit is used for transmitting the first voltage to the control end of the second transistor unit when the first transistor unit is conducted for the first time under the action of scanning voltage provided by the first scanning line, and transmitting the second voltage to the control end of the second transistor unit when the first transistor unit is conducted for the second time, wherein the time interval between the second conduction and the first conduction is related to the magnitude of the data voltage on the basis of determination of the light-emitting brightness of the light-emitting device;
the storage capacitor unit is used for maintaining the stability of the voltage at the control end of the second transistor unit when the first transistor unit is in an off-to-state;
the second transistor unit is configured to control the light emitting device to emit light between receiving the first voltage and receiving the second voltage, and control the light emitting device not to emit light between receiving the second voltage and receiving the first voltage next time.
3. The circuit of claim 2, wherein the first transistor unit comprises a P-type thin film transistor, and/or wherein the second transistor unit comprises a P-type thin film transistor.
4. A circuit according to claim 2 or 3, wherein the storage capacitor unit comprises a storage capacitor.
5. The circuit according to claim 1, wherein the light emission control unit comprises: a third transistor unit and a fourth transistor unit;
the control end of the third transistor unit is connected with the second scanning line, the first end of the third transistor unit is connected with a fourth voltage source, the second end of the third transistor unit is connected with the control end of the fourth transistor unit, the first end of the fourth transistor unit is connected with the analog pixel driving circuit, and the second end of the fourth transistor unit is connected with the light-emitting device;
the fourth voltage source is used for providing a third voltage, and the third voltage is used for controlling the fourth transistor unit to enable the light-emitting device to emit light;
the third transistor unit is configured to be in an on state when the second scan line provides a scan voltage, transmit the third voltage to the control terminal of the fourth transistor unit, and be in an off state when the second scan line stops providing the scan voltage, and stop transmitting the third voltage to the control terminal of the fourth transistor unit, where a duration of providing the scan voltage by the second scan line is related to a magnitude of the data voltage on the basis of determination of light emission brightness of the light emitting device;
the fourth transistor unit is configured to control the light emitting device to emit light during a time period when the third voltage is received, and control the light emitting device not to emit light during a time period when the third voltage is not received.
6. The circuit of claim 5, wherein the third transistor unit comprises a P-type thin film transistor, and/or wherein the fourth transistor unit comprises a P-type thin film transistor.
7. The circuit according to claim 1, wherein the light emission control unit comprises: a fifth transistor unit;
the control end of the fifth transistor unit is connected with a fifth voltage source, the first end of the fifth transistor unit is connected with the analog pixel driving circuit, and the second end of the fifth transistor unit is connected with the light-emitting device;
the fifth voltage source provides a fourth voltage and a fifth voltage with different voltage values, the fourth voltage is used for controlling the fifth transistor unit to enable the light-emitting device to emit light, the fifth voltage is used for controlling the fifth transistor unit to enable the light-emitting device not to emit light, and the time interval between the fifth voltage source and the fifth voltage is adjusted to be output by the fourth voltage on the basis of the determination of the light-emitting brightness of the light-emitting device is related to the magnitude of the data voltage;
and the fifth transistor unit is used for controlling the light-emitting device to emit light in a time period for receiving the fourth voltage, and controlling the light-emitting device not to emit light in a time period for receiving the fifth voltage.
8. The circuit of claim 7, wherein the fifth transistor unit comprises a P-type TFT or an N-type TFT.
9. A display panel comprising the pixel drive circuit according to any one of claims 1 to 8.
10. A terminal device characterized by comprising processing means, storage means, and the display panel of claim 9.
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| CN202010456406.6A CN111583871A (en) | 2020-05-26 | 2020-05-26 | Pixel driving circuit, display panel and electronic device |
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| CN202010456406.6A CN111583871A (en) | 2020-05-26 | 2020-05-26 | Pixel driving circuit, display panel and electronic device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022052240A1 (en) * | 2020-09-08 | 2022-03-17 | Tcl华星光电技术有限公司 | Multi-grayscale pixel driving circuit, and display panel |
| CN114360434A (en) * | 2022-01-10 | 2022-04-15 | 深圳市华星光电半导体显示技术有限公司 | Pixel circuit and display panel |
| CN114446245A (en) * | 2022-03-23 | 2022-05-06 | 武汉天马微电子有限公司 | Pixel driving circuit and driving method thereof, display panel and display device |
| CN114648944A (en) * | 2020-12-21 | 2022-06-21 | 西安钛铂锶电子科技有限公司 | Display driving method and circuit, LED display panel and display device |
| CN114664227A (en) * | 2022-03-18 | 2022-06-24 | Tcl华星光电技术有限公司 | Drive circuit and drive method |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030193457A1 (en) * | 2002-04-16 | 2003-10-16 | Wen-Chun Wang | Pixel structure of a sunlight readable display |
| US20110095967A1 (en) * | 2009-10-26 | 2011-04-28 | Sang-Moo Choi | Pixel and organic light emitting display device using the same |
| CN102456318A (en) * | 2010-10-22 | 2012-05-16 | 乐金显示有限公司 | Organic light emitting diode display device |
| CN102479486A (en) * | 2010-11-24 | 2012-05-30 | 佳能株式会社 | Organic electroluminescence displaying apparatus |
| US20170032739A1 (en) * | 2015-07-31 | 2017-02-02 | Samsung Display Co., Ltd. | Pixel and organic light emitting display device including the same |
| CN107610652A (en) * | 2017-09-28 | 2018-01-19 | 京东方科技集团股份有限公司 | Image element circuit, its driving method, display panel and display device |
| CN107909967A (en) * | 2017-12-11 | 2018-04-13 | 成都晶砂科技有限公司 | A kind of driving method and drive circuit of optional driving tube working region |
| CN108010489A (en) * | 2017-11-30 | 2018-05-08 | 南京中电熊猫平板显示科技有限公司 | A kind of OLED driver circuit and its display device |
| CN108470537A (en) * | 2018-06-14 | 2018-08-31 | 京东方科技集团股份有限公司 | Sub-pixel circuits, pixel circuit and its driving method and display device |
| CN109872680A (en) * | 2019-03-20 | 2019-06-11 | 京东方科技集团股份有限公司 | Pixel circuit and driving method, display panel and driving method, display device |
| CN110400538A (en) * | 2018-04-19 | 2019-11-01 | 群创光电股份有限公司 | Electronic device |
| CN210378422U (en) * | 2019-11-27 | 2020-04-21 | 京东方科技集团股份有限公司 | Pixel circuit and display device |
-
2020
- 2020-05-26 CN CN202010456406.6A patent/CN111583871A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030193457A1 (en) * | 2002-04-16 | 2003-10-16 | Wen-Chun Wang | Pixel structure of a sunlight readable display |
| US20110095967A1 (en) * | 2009-10-26 | 2011-04-28 | Sang-Moo Choi | Pixel and organic light emitting display device using the same |
| CN102456318A (en) * | 2010-10-22 | 2012-05-16 | 乐金显示有限公司 | Organic light emitting diode display device |
| CN102479486A (en) * | 2010-11-24 | 2012-05-30 | 佳能株式会社 | Organic electroluminescence displaying apparatus |
| US20170032739A1 (en) * | 2015-07-31 | 2017-02-02 | Samsung Display Co., Ltd. | Pixel and organic light emitting display device including the same |
| CN107610652A (en) * | 2017-09-28 | 2018-01-19 | 京东方科技集团股份有限公司 | Image element circuit, its driving method, display panel and display device |
| CN108010489A (en) * | 2017-11-30 | 2018-05-08 | 南京中电熊猫平板显示科技有限公司 | A kind of OLED driver circuit and its display device |
| CN107909967A (en) * | 2017-12-11 | 2018-04-13 | 成都晶砂科技有限公司 | A kind of driving method and drive circuit of optional driving tube working region |
| CN110400538A (en) * | 2018-04-19 | 2019-11-01 | 群创光电股份有限公司 | Electronic device |
| CN108470537A (en) * | 2018-06-14 | 2018-08-31 | 京东方科技集团股份有限公司 | Sub-pixel circuits, pixel circuit and its driving method and display device |
| CN109872680A (en) * | 2019-03-20 | 2019-06-11 | 京东方科技集团股份有限公司 | Pixel circuit and driving method, display panel and driving method, display device |
| CN210378422U (en) * | 2019-11-27 | 2020-04-21 | 京东方科技集团股份有限公司 | Pixel circuit and display device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022052240A1 (en) * | 2020-09-08 | 2022-03-17 | Tcl华星光电技术有限公司 | Multi-grayscale pixel driving circuit, and display panel |
| CN114648944A (en) * | 2020-12-21 | 2022-06-21 | 西安钛铂锶电子科技有限公司 | Display driving method and circuit, LED display panel and display device |
| CN114360434A (en) * | 2022-01-10 | 2022-04-15 | 深圳市华星光电半导体显示技术有限公司 | Pixel circuit and display panel |
| CN114664227A (en) * | 2022-03-18 | 2022-06-24 | Tcl华星光电技术有限公司 | Drive circuit and drive method |
| CN114446245A (en) * | 2022-03-23 | 2022-05-06 | 武汉天马微电子有限公司 | Pixel driving circuit and driving method thereof, display panel and display device |
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Application publication date: 20200825 |