CN112071272B - Light-emitting control circuit and display panel - Google Patents
Light-emitting control circuit and display panel Download PDFInfo
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- CN112071272B CN112071272B CN202010959830.2A CN202010959830A CN112071272B CN 112071272 B CN112071272 B CN 112071272B CN 202010959830 A CN202010959830 A CN 202010959830A CN 112071272 B CN112071272 B CN 112071272B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3266—Details of drivers for scan electrodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- 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
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- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of El Displays (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The application provides a luminescence control circuit and display panel, this luminescence control circuit inserts effective signal through switching first control signal or second control signal, realize one and drive a mode or one and drive the multimode respectively, wherein, one drives the multimode and constitutes a luminescence control module group for selecting every M luminescence control units that cascade in succession, M is greater than 1 integer fixed value, make 1 st luminescence control unit in every luminescence control module group drive the M line pixel that this luminescence control module group corresponds and shine simultaneously, one drives the multimode and compare in one and drive a mode and make clock signal just need transmit once driving every M line pixel, therefore reduced the frequency of clock signal, thereby reduced the power consumption of circuit, can improve the duration of the display panel that adopts this circuit. Meanwhile, the light-emitting control circuit gives possibility of multiple light-emitting control modes, and when one mode fails, the light-emitting control circuit can be switched to another mode, so that the redundancy of the circuit is enhanced.
Description
Technical Field
The application relates to the technical field of display, in particular to a light-emitting control circuit and a display panel.
Background
Currently, pixel circuits of an Organic Light Emitting Diode (OLED) display panel are often driven by a GOA circuit to perform display. The GOA circuit is composed of a plurality of cascaded GOA units, and each GOA unit drives at least one row of pixels.
The GOA circuit can provide three types of control signals, namely a Reset (Reset) signal, a Scan (Scan) signal and an Emission (EM) signal, wherein the Reset signal, the Scan signal and the emission signal all generally adopt a single one-drive mode, that is, each Reset signal and each Scan signal drive a row of pixels to be Reset and turned on so as to Scan display data into the row of pixels, and the storage capacitors of the row of pixel circuits are used for storing the display data; when the scanning signal turns on the row of pixels, the light-emitting signal enables the data signal to be read correctly, the organic light-emitting diode is forbidden to emit light in the process of reading the display data, and the organic light-emitting diode in the row is turned on to emit light after the display data is written into the row of pixels.
The reset signal, the scanning signal and the light-emitting signal of the GOA circuit drive the organic light-emitting diode to display according to the time sequence of the clock signal. The power consumption of the GOA circuit is related to the switching frequency of the clock signal, the higher the switching frequency is, the larger the power consumption of the GOA circuit is, and the clock signal needs to be switched once every line of pixels is driven in a driving mode, which is not beneficial to saving the power consumption of the GOA circuit. It should be noted that, in order to avoid the glitch, it is generally better to adopt a one-driving mode for the reset signal and the scan signal, but the driving mode for the light-emitting signal can be improved to save the power consumption of the GOA circuit.
Disclosure of Invention
In order to solve the above problems, the present application provides a light emitting control circuit and a display panel.
In a first aspect, the present application provides a light-emitting control circuit, which includes a plurality of cascaded light-emitting control units, each of which is correspondingly connected to a row of pixels, and further includes a first clock signal line, a second clock signal line, and a first control signal line, a first start signal line, a second start signal line and a second control signal line, which are sequentially and vertically disposed between the light-emitting control unit and a pixel region, wherein the first control signal line is close to the light-emitting control unit, and the second control signal line is close to the pixel region.
The first starting signal line and the first clock signal line are respectively connected with the first control signal line and provided with a thin film transistor switch at the joint, the first clock signal line is connected with each light-emitting control unit, the second starting signal line and the second clock signal line are respectively connected with the second control signal line and provided with a thin film transistor switch at the joint, and the first starting signal line and the second starting signal line are respectively connected with the 1 st light-emitting control unit in all the light-emitting control units.
Each M continuously cascaded light-emitting control units respectively form a light-emitting control module, and M is an integer fixed value larger than 1; the first control signal line and the second control signal line with every 2 nd to Mth in the luminescence control module group the crossing of the luminescence control unit and the connecting line of the corresponding row pixel is provided with a thin film transistor switch, and the second clock signal line is connected with every 1 st in the luminescence control module group the luminescence control unit.
At the same time, one of the first control signal line and the second control signal line is connected with a valid signal; when the first control signal line is connected with an effective signal, the thin film transistor switches on the first starting signal line and the first clock signal line are turned on, the thin film transistor switches on the second starting signal line and the second clock signal line are turned off, and each light-emitting control unit drives a corresponding row of pixels to emit light.
When the second control signal line is connected with an effective signal, the thin film transistor switches on the second starting signal line and the second clock signal line are turned on, the thin film transistor switches on the first starting signal line and the first clock signal line are turned off, and the 1 st light-emitting control unit in each light-emitting control module drives the M rows of pixels corresponding to the light-emitting control module to emit light simultaneously.
In some embodiments, the output terminal of the previous light emission control unit is connected to the input terminal of the next light emission control unit via a cascade line; the output end of the 1 st light-emitting control unit in each light-emitting control module is connected with the corresponding row pixels, and the input ends and the output ends of the 2 nd to Mth light-emitting control units in each light-emitting control module are connected with each other and are respectively connected with the corresponding row pixels.
In some embodiments, when the first control signal line is switched in a valid signal, each of the light-emitting control units drives a row of pixels to emit light through a connection line between the light-emitting control unit and the corresponding row of pixels; when the second control signal is connected to an effective signal, the 1 st light-emitting control unit in each light-emitting control module drives the M rows of pixels corresponding to the light-emitting control module to emit light simultaneously through the cascade lines among the M light-emitting control units in the light-emitting control module and the connecting lines between the M light-emitting control units and the corresponding M rows of pixels.
In some embodiments, when the second control signal line is connected to a valid signal, the 1 st light-emitting control unit in each light-emitting control module is in an operating state, and the 2 nd to mth light-emitting control units in each light-emitting control module are in a non-operating state.
In some embodiments, the light emission control circuit further includes a high-level power line and a low-level power line, the high-level power line and the low-level power line are respectively connected to each of the light emission control units, and a connection line between the high-level power line and the low-level power line and a 2 nd to an mth light emission control unit in each of the light emission control modules is further connected to the first control signal line and provided with a thin film transistor switch at a connection point.
When the first control signal line is switched in a valid signal, the thin film transistor switches on the connecting lines between the high-level power line and the low-level power line and the 2 nd to Mth light-emitting control units in each light-emitting control module are turned on; when the second control signal line is connected with a valid signal, the thin film transistor switches on the connecting lines between the high-level power line and the low-level power line and the 2 nd to Mth light-emitting control units in each light-emitting control module are turned off.
In some embodiments, the light emission control circuit includes two first clock signal lines and two second clock signal lines, the two first clock signal lines are connected to the first control signal line, and the two second clock signal lines are connected to the second control signal line.
In some embodiments, the light emission control circuit includes two of the first control signal lines and two of the second control signal lines, one of the first control signal lines is connected to the first start signal line, and the other of the first control signal lines is connected to the first clock signal line; one of the second control signal lines is connected to the second start signal line, and the other of the second control signal lines is connected to the second clock signal line.
In some embodiments, all of the thin film transistor switches are P-type thin film transistors, and the active signal is a low level signal.
In some embodiments, all of the thin film transistor switches are N-type thin film transistors, and the active signal is a high level signal.
In a second aspect, the present application also provides a display panel including the light emission control circuit as described above.
In the light-emitting control circuit and the display panel provided by the application, when a first control signal is connected to an effective signal, the light-emitting control circuit realizes a driving mode, and meanwhile, every M light-emitting control units which are continuously cascaded can be selected to form a light-emitting control module, wherein M is an integer fixed value greater than 1, when a second control signal is connected to the effective signal, the 1 st light-emitting control unit in each light-emitting control module drives M pixels corresponding to the light-emitting control module to emit light simultaneously, and the driving mode is realized. Compared with a driving mode, the driving mode of the driving mode enables the clock signal to be transmitted once when the driving mode drives every M rows of pixels, and therefore the frequency of the clock signal is reduced, power consumption of the circuit is reduced, and the cruising ability of a display panel adopting the circuit can be improved. The light-emitting control circuit can select one-drive mode or one-drive multi-mode according to actual needs, the possibility of multiple light-emitting control modes is provided, when one light-emitting drive mode fails, the light-emitting control circuit can be switched to the other light-emitting drive mode, and the redundancy of the circuit is enhanced.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a first structure of a light-emitting control circuit according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of a light-emitting control circuit with a first structure for a driving-mode according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of a lighting control loop with a first structure for driving multiple modes according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of a second structure of a light-emitting control circuit according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram illustrating a second structure of a light-emitting control circuit according to an embodiment of the present disclosure for a driving mode;
fig. 6 is a schematic diagram of a second structure of a light-emitting control circuit for a first-driving-four mode according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a display panel according to an embodiment of the present application.
Detailed Description
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. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 1 is a schematic diagram of a first structure of a light-emitting control circuit according to an embodiment of the present invention, and as shown in fig. 1, the embodiment of the present invention provides a light-emitting control circuit 1, where the light-emitting control circuit 1 includes a plurality of cascaded light-emitting control units 2, each light-emitting control unit 2 is correspondingly connected to a row of pixels, the light-emitting control circuit 1 further includes a first clock signal line CK1, a second clock signal line CK2, and a first control signal line EM1, a first start signal line STV1, a second start signal line STV2, and a second control signal line EM2, which are sequentially and vertically disposed between the light-emitting control unit 2 and a pixel region, the first control signal line EM1 is close to the light-emitting control unit 2, and the second control signal line EM2 is close to the pixel region.
The first start signal line STV1 and the first clock signal line CK1 are connected to the first control signal line EM1, thin film transistor switches are provided on the first start signal line STV1 and the first clock signal line CK1 at the connection points, the first clock signal line CK1 is connected to each light-emission control unit 2, the second start signal line STV2 and the second clock signal line CK2 are connected to the second control signal line EM2, thin film transistor switches are provided on the second start signal line STV2 and the second clock signal line CK2 at the connection points, and the first start signal line STV1 and the second start signal line STV2 are connected to the 1 st light-emission control unit 2 of all the light-emission control units 2.
Each M of the continuously cascaded light-emitting control units respectively form a light-emitting control module 3, M is an integer fixed value greater than 1, and for the sake of distinction, the 1 st light-emitting control unit 2 in each light-emitting control module 3 is labeled as 21 in fig. 1; thin film transistor switches are provided at intersections of the first control signal line EM1 and the second control signal line EM2 with the connection lines of the 2 nd to mth light emission control units 2 in each light emission control module 3 and the corresponding row pixels, and the second clock signal line CK2 is connected with the 1 st light emission control unit 21 in each light emission control module 3.
At the same time, one of the first control signal line EM1 and the second control signal line EM2 is connected with an active signal, wherein the active signal refers to a signal for turning on a thin film transistor switch connected with the first control signal line EM1 or the second control signal line EM2, if the thin film transistor switch is an N-type thin film transistor, the active signal is a high level signal, and if the thin film transistor switch is a P-type thin film transistor, the active signal is a low level signal; when the first control signal line EM1 receives an active signal, the tft switches on the first start signal line STV1 and the first clock signal line CK1 are turned on, the tft switches on the second start signal line STV2 and the second clock signal line CK2 are turned off, and each light-emission control unit 2 drives a corresponding row of pixels to emit light.
When the second control signal line EM2 receives an active signal, the tft switches on the second start signal line STV2 and the second clock signal line CK2 are turned on, the tft switches on the first start signal line STV1 and the first clock signal line CK1 are turned off, and the 1 st emission control unit 21 in each emission control module 3 drives the M rows of pixels corresponding to the emission control module 3 to emit light simultaneously.
The light-emitting control circuit provided by the embodiment of the application realizes a driving mode when the first control signal EM1 is accessed to the effective signal, and simultaneously, every M light-emitting control units 2 which are continuously cascaded can be selected to form a light-emitting control module 3(M is greater than 1), and when the second control signal EM2 is accessed to the effective signal, the 1 st light-emitting control unit 21 in each light-emitting control module 3 drives the M rows of pixels corresponding to the light-emitting control module 3 to emit light simultaneously, so that a driving mode is realized. Compared with a driving mode, the driving mode of the driving mode enables the clock signal to be transmitted once when the driving mode drives every M rows of pixels, and therefore the frequency of the clock signal is reduced, power consumption of the circuit is reduced, and the cruising ability of a display panel adopting the circuit can be improved. The light-emitting control circuit can select one-drive mode or one-drive multi-mode according to actual needs, the possibility of multiple light-emitting control modes is provided, when one light-emitting drive mode fails, the light-emitting control circuit can be switched to the other light-emitting drive mode, and the redundancy of the circuit is enhanced.
It is emphasized that in one-drive multi-mode, the actual wiring of the lighting control circuit differs for each lighting control module 3 for different values of M, so that M is a fixed value for each lighting control circuit.
It is understood that the plurality of light emission control modules 3 are used to sequentially drive the corresponding pixels of every M rows to emit light simultaneously. That is, the plurality of light-emitting control modules 3 are also cascaded, after the previous light-emitting control module 3 drives the corresponding M rows of pixels to emit light simultaneously, the next light-emitting control module 3 drives the corresponding M rows of pixels to emit light simultaneously, so that each M rows of pixels emit light simultaneously in sequence.
As shown IN fig. 1, the output terminal OUT of the previous light-emission control unit 2 is connected to the input terminal IN of the next light-emission control unit 2 through a cascade line; the output end of the 1 st emission control unit 21 IN each emission control module 3 is connected to the corresponding row pixel, and the input end OUT and the output end IN of the 2 nd to mth emission control units 2 IN each emission control module are connected to each other and are all connected to the corresponding row pixel.
Further, fig. 2 is a schematic diagram of an emission control circuit with a first structure for driving a mode according to an embodiment of the present disclosure (a dotted line in the emission control module 3 in fig. 2 is an emission control circuit with a first structure for driving a mode in fig. 1), as shown in fig. 2, when the first control signal line EM1 is asserted, each emission control unit 2 drives a row of pixels to emit light through a connection line between the emission control unit 2 and a corresponding row of pixels.
Further, fig. 3 is a schematic diagram of a light emitting control loop of a first structure for driving multiple modes of the light emitting control circuit provided by the embodiment of the present application (a dotted line in the light emitting control module 3 in fig. 3 is a light emitting control loop of the first structure for driving multiple modes in fig. 1), and as shown in fig. 3, when the second control signal EM2 is switched in to the active signal, the 1 st light emitting control unit 21 in each light emitting control module 3 drives the M rows of pixels corresponding to the light emitting control module 3 to emit light simultaneously through the cascade line between the M light emitting control units 2 in the light emitting control module 3 and the connection line between the M light emitting control units and the corresponding M rows of pixels.
It is understood that when the second control signal line EM2 is connected to the active signal, the lighting control circuit switches to a driving mode, the 1 st lighting control unit 21 in each lighting control module 3 is in an active state, and the 2 nd to mth lighting control units 2 are in an inactive state. That is, only the 1 st light-emitting control module 21 in each light-emitting control module 3 needs to drive the M rows of pixels corresponding to the M light-emitting control units 2 in the light-emitting control module 3 to emit light simultaneously, and it is not necessary to transmit the step-by-step transmission signals between the M light-emitting control units 2, so that the transmission steps of the step-by-step transmission signals are reduced, and the transmission speed of the step-by-step transmission signals is increased.
As shown in fig. 1, the light emission control circuit further includes a high-level power line H and a low-level power line L, which are respectively connected to each of the light emission control units 2, and a connection line between the high-level power line H and the low-level power line L and the 2 nd to mth light emission control units 2 in each of the light emission control modules 3 is further connected to a first control signal line EM1 and provided with a thin film transistor switch at the connection.
Specifically, when the first control signal line EM1 is switched in a valid signal, the thin film transistor switches on the connection lines between the high-level power line H and the low-level power line L and the 2 nd to mth light emission control units 2 in each light emission control module group 3 are turned on; when the second control signal line EM2 is turned on by an active signal, the thin film transistor switches on the connection lines between the high-level power line H and the low-level power line L and the 2 nd to mth light emission control units 2 in each light emission control module group 3 are turned off.
Furthermore, the light-emitting control circuit can comprise two first clock signal lines and two second clock signal lines, the two first clock signal lines are connected with the first control signal line, the two second clock signal lines are connected with the second control signal line, each group of clock signals are respectively driven by the two clock signal lines at the same time, failure during high-low level conversion of the clock signals can be prevented, and the stability of the circuit is improved.
Furthermore, the light-emitting control circuit comprises two first control signal lines and two second control signal lines, wherein one first control signal line is connected with the first starting signal line, and the other first control signal line is connected with the first clock signal line; one of the second control signal lines is connected with the second starting signal line, the other second control signal line is connected with the second clock signal line, so that the clock signal line and the starting signal line are located on two sides of the light-emitting control unit, when the clock signal line is located on one side, far away from the pixel area, of the light-emitting control unit, the two control signal lines are arranged on two sides of the light-emitting control signal line, one control signal line is used for controlling the starting signal line, and the other control signal line is used for controlling the clock signal line.
In some embodiments, all of the tft switches are P-type tfts, and the active signal is a low level signal; or all the thin film transistor switches are N-type thin film transistors, and the effective signal is a high-level signal.
When M is 4 and each 4 light-emitting control units in the continuous cascade connection form a light-emitting control module, the following specific embodiment is given to illustrate an actual circuit situation in which the light-emitting control circuit switches to implement a one-drive light-emitting driving mode or a one-drive four-light-emitting driving mode.
Fig. 4 is a schematic diagram of a second structure of the light emission control circuit according to the embodiment of the present invention, as shown in fig. 4, the light emission control circuit includes a 1 st light emission control unit 21, a second light emission control unit 22, a third light emission control unit 23, and a fourth light emission control unit 24 respectively corresponding to a first row of pixels, a second row of pixels, a third row of pixels, and a fourth row of pixels, and a row start signal line STV11, a four row start signal line STV44, two first control signal lines EM11 and EM12, two second control signal lines EM21 and EM22, a first group of clock signal lines CK11/XCK11, and a second group of clock signal lines CK44/XCK 44. One of the first control signal lines EM11 is connected to a row start signal line STV11, and the other first control signal line EM12 is connected to the first group of clock signal lines CK11/XCK 11; one of the second control signal lines EM21 is connected to four rows of start signals STV44, and the other second control signal line EM22 is connected to the second group of clock signal lines CK44/XCK 44.
It should be noted that, in order to facilitate understanding of the connection relationship of the circuits, fig. 4 also shows a fifth row of pixels and a corresponding fifth emission control unit. All the thin film transistors in the embodiment of the application are P-type thin film transistors, and the effective signal is a low level signal.
Fig. 5 is a schematic diagram of a second structure of the light-emitting control circuit provided in this embodiment for a first driving mode (the tft is turned off in the figure), and as shown in fig. 5, when two first control signal lines EM11 and EM12 both receive an active signal, a row start signal line STV11 drives a first row of pixels to emit light by using a connection line between the first light-emitting control unit 21 and the first row of pixels, and then transmits a light-emitting signal to a second light-emitting control unit 22 through a stage transmission line between the first light-emitting control unit 21 and the second light-emitting control unit 22, the second light-emitting control unit 22 drives a second row of pixels to emit light by using a connection line between the second light-emitting control unit 22 and the second row of pixels, and so on, the third light-emitting control unit 23 drives a third row of pixels to emit light by using a connection line between the third light-emitting control unit 23 and the third row of pixels, the fourth light-emission control unit 24 drives the fourth row pixel to emit light using a connection line between the fourth light-emission control unit 24 and the fourth row pixel, thereby implementing a drive-one mode.
Or, fig. 6 is a schematic diagram (the cross in the figure is broken) of the second structure of the light-emitting control circuit provided in this embodiment of the present application for the one-driving-four mode, and as shown in fig. 6, when two second control signal lines EM21 and EM22 both receive the valid signal, the light-emitting control circuit switches from the one-driving-one mode to the one-driving-four mode, the 1 st light-emitting control unit 21 of each light-emitting control module 3 passes through the stage transmission lines among the 1 st light-emitting control unit 21, the second light-emitting control unit 22, the third light-emitting control unit 23, and the fourth light-emitting control unit 24, and the connection line between the 1 st light-emitting control unit 21 and the first row of pixels, the connection line between the second light-emitting control unit 22 and the second row of pixels, the connection line between the third light-emitting control unit 23 and the third row of pixels, and the connection line between the fourth light-emitting control unit 24 and the fourth row of pixels, four rows of pixels are driven to emit light simultaneously.
The light-emitting control circuit provided by the embodiment of the application can realize one-driving mode when two first control signal lines EM11 and EM12 are connected with effective signals, and simultaneously, every 4 continuous cascaded light-emitting control units 2 are selected to form a light-emitting control module 3, when two second control signal lines EM21 and EM22 are connected with effective signals, the 1 st light-emitting control unit 21 in each light-emitting control module 3 drives 4 rows of pixels corresponding to the light-emitting control module 3 to emit light simultaneously, and one-driving four-driving mode is realized. Compared with the one-drive-four mode, the one-drive-four mode enables the clock signal to be transmitted once only when the clock signal drives every 4 rows of pixels, so that the frequency of the clock signal is reduced, the power consumption of the circuit is reduced, and the cruising ability of a display panel adopting the circuit can be improved. The light-emitting control circuit can select one-driving-one mode or one-driving-four mode according to actual needs, and when one light-emitting driving mode fails, the other light-emitting driving mode can be switched, so that the redundancy of the circuit is enhanced.
Fig. 7 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure, and as shown in fig. 7, an embodiment of the present disclosure further provides a display panel 4, where the display panel 4 includes the light-emitting control circuit 1, and the display panel 4 and the light-emitting control circuit 1 have the same structure and beneficial effects, and since the light-emitting control circuit 1 has been described in detail in the foregoing embodiment, details are not repeated here.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The principle and the implementation of the present application are explained by applying specific examples, and the above description of the embodiments is only used to help understanding the technical solution and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (7)
1. A light-emitting control circuit comprises a plurality of cascaded light-emitting control units, wherein each light-emitting control unit is correspondingly connected with a row of pixels, and the light-emitting control circuit is characterized by further comprising a first clock signal line, a second clock signal line, a first control signal line, a first starting signal line, a second starting signal line and a second control signal line, wherein the first control signal line, the second starting signal line and the second control signal line are sequentially and vertically arranged between the light-emitting control units and a pixel area;
the first starting signal line and the first clock signal line are respectively connected with the first control signal line and provided with a thin film transistor switch at the connection part, the first clock signal line is connected with each light-emitting control unit, the second starting signal line and the second clock signal line are respectively connected with the second control signal line and provided with a thin film transistor switch at the connection part, and the first starting signal line and the second starting signal line are respectively connected with the 1 st light-emitting control unit in all the light-emitting control units;
each M continuously cascaded light-emitting control units respectively form a light-emitting control module, and M is an integer fixed value larger than 1; thin film transistor switches are arranged at the intersections of the first control signal line and the second control signal line with the connecting lines of the 2 nd to Mth light-emitting control units in each light-emitting control module and the corresponding row pixels, and the second clock signal line is connected with the 1 st light-emitting control unit in each light-emitting control module;
at the same time, one of the first control signal line and the second control signal line is connected with an effective signal, when the first control signal line is connected with an effective signal, the thin film transistor switches on the first starting signal line and the first clock signal line are opened, the thin film transistor switches on the second starting signal line and the second clock signal line are closed, and each light-emitting control unit drives a corresponding row of pixels to emit light,
when the second control signal line is connected with an effective signal, the thin film transistor switches on the second starting signal line and the second clock signal line are turned on, the thin film transistor switches on the first starting signal line and the first clock signal line are turned off, and the 1 st light-emitting control unit in each light-emitting control module drives the M rows of pixels corresponding to the light-emitting control module to emit light simultaneously;
the output end of the last light-emitting control unit is connected with the input end of the next light-emitting control unit through a cascade line, the output end of the 1 st light-emitting control unit in each light-emitting control module is connected with the corresponding row pixel, and the input ends and the output ends of the 2 nd to Mth light-emitting control units in each light-emitting control module are mutually connected and are respectively connected with the corresponding row pixel;
when the first control signal line is connected with an effective signal, each light-emitting control unit drives the pixels of the row to emit light through the connecting line between the light-emitting control unit and the corresponding pixel of the row; when the second control signal is accessed to an effective signal, the 1 st light-emitting control unit in each light-emitting control module drives the M rows of pixels corresponding to the light-emitting control module to emit light simultaneously through the cascade lines among the M light-emitting control units in the light-emitting control module and the connecting lines between the M light-emitting control units and the corresponding M rows of pixels;
when the second control signal line is connected with an effective signal, the 1 st light-emitting control unit in each light-emitting control module is in a working state, and the 2 nd to Mth light-emitting control units in each light-emitting control module are in a non-working state.
2. The light emission control circuit according to claim 1, wherein the light emission control circuit further comprises a high-level power supply line and a low-level power supply line, the high-level power supply line and the low-level power supply line are respectively connected to each of the light emission control units, and a connection line between the high-level power supply line and the low-level power supply line and the 2 nd to mth light emission control units in each of the light emission control modules is further connected to the first control signal line and provided with a thin film transistor switch at the connection;
when the first control signal line is switched in a valid signal, the thin film transistor switches on the connecting lines between the high-level power line and the low-level power line and the 2 nd to Mth light-emitting control units in each light-emitting control module are turned on; when the second control signal line is connected with a valid signal, the thin film transistor switches on the connecting lines between the high-level power line and the low-level power line and the 2 nd to Mth light-emitting control units in each light-emitting control module are turned off.
3. The light emission control circuit according to claim 1, wherein the light emission control circuit includes two of the first clock signal lines and two of the second clock signal lines, the two of the first clock signal lines being connected to the first control signal line, the two of the second clock signal lines being connected to the second control signal line.
4. The light emission control circuit according to claim 1, wherein the light emission control circuit includes two of the first control signal lines and two of the second control signal lines, one of the first control signal lines being connected to the first start signal line, and the other of the first control signal lines being connected to the first clock signal line; one of the second control signal lines is connected to the second start signal line, and the other of the second control signal lines is connected to the second clock signal line.
5. The illumination control circuit of claim 1, wherein all of the thin film transistor switches are P-type thin film transistors, and the active signal is a low signal.
6. The illumination control circuit of claim 1, wherein all of the thin film transistor switches are N-type thin film transistors, and the active signal is a high signal.
7. A display panel comprising the light emission control circuit according to any one of claims 1 to 6.
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| CN112071272A (en) | 2020-12-11 |
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