CN116825030B - Driving control circuit of light emitting array, driving control method of driving control circuit and display screen - Google Patents
Driving control circuit of light emitting array, driving control method of driving control circuit and display screen Download PDFInfo
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- CN116825030B CN116825030B CN202311079508.0A CN202311079508A CN116825030B CN 116825030 B CN116825030 B CN 116825030B CN 202311079508 A CN202311079508 A CN 202311079508A CN 116825030 B CN116825030 B CN 116825030B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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Abstract
The application discloses a drive control circuit of a light emitting array, a method thereof and a display screen, wherein the device comprises: the first input end of the judging module is connected with a first column signal line in the light emitting array; the second input end of the judging module is connected with a second column signal line; the output end of the judging module is used for outputting corresponding judging signals according to the first voltage and the second voltage when the first row of signal lines receive scanning signals at the starting level, and the judging signals are used for indicating the state of the light-emitting unit; the control end of the voltage pull-up module is used for receiving the judging signal, the first end of the voltage pull-up module is connected with the first column signal line, and the second end of the voltage pull-up module is connected with the second column signal line; the voltage pull-up module is used for pulling up the second voltage to be equal to the first voltage when the judgment signal indicates that the light emitting unit is in an open state. The application can solve the problem of cross bright line caused by open circuit of the light emitting units in the light emitting array, and improves the display image quality of the product.
Description
Technical Field
The application belongs to the technical field of display screens, and particularly relates to a drive control circuit of a light emitting array, a method thereof and a display screen.
Background
The Mini LED (sub-millimeter light emitting diode) backlight is used as a backlight source of a liquid crystal display (Liquid Crystal Display, LCD) panel, so that the Mini LED has the advantages of ultra-High contrast, high color gamut and High Dynamic Range (HDR), and the display effect is greatly improved. Compared with the traditional backlight, the Mini LED backlight can achieve better brightness uniformity in a smaller light mixing distance, and has finer HDR partition due to the adoption of local dimming design, and the contrast ratio of liquid crystal display is greatly improved. However, due to the characteristics of the Mini LED, when the open circuit problem occurs to the Mini LED lamp beads, the bright line problem of the cross can be caused, and the display effect of the product is affected.
It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the application and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.
Disclosure of Invention
The application aims to provide a drive control circuit of a light emitting array, a method thereof and a display screen, which are used for solving the problem that a cross bright line appears when a Mini LED lamp bead is opened.
According to an aspect of an embodiment of the present application, there is provided a drive control circuit of a light emitting array, the apparatus including:
the first input end of the judging module is connected with a first column signal line in the light emitting array; the second input end of the judging module is connected with a second column signal line adjacent to the first column signal line; the output end of the judging module is used for outputting judging signals of the light emitting units corresponding to the first row signal line and the second column signal line according to the first voltage of the first column signal line and the second voltage of the second column signal line when the first row signal line of the light emitting array receives the scanning signal at the on level, wherein the judging signals are used for indicating the states of the light emitting units;
the control end of the voltage pull-up module is used for receiving the judging signal, the first end of the voltage pull-up module is connected with the first column signal line, and the second end of the voltage pull-up module is connected with the second column signal line; the voltage pull-up module is used for pulling up the second voltage to be equal to the first voltage when the judgment signal indicates that the light emitting unit is in an open state.
In one embodiment of the present application, the apparatus further includes a voltage maintaining module, an input end of the voltage maintaining module is configured to receive an initial determination signal, an output end of the voltage maintaining module is connected to a control end of the voltage pull-up module, and a control end of the voltage maintaining module is configured to receive a first timing signal; the voltage maintaining module is used for controlling the voltage of the output end of the voltage maintaining module to be equal to the initial judging signal in the pulse duration time of the first time sequence signal according to the first time sequence signal and the initial judging signal.
In one embodiment of the present application, the pulse duration of the first timing signal is equal to the pulse duration of the data signal corresponding to the second column signal line, and the data signal is used to control the duration in which the second voltage is pulled up.
In one embodiment of the present application, the apparatus further comprises a timing control module for controlling the timing of transmitting the scan signal and the data signal, and transmitting the first timing signal.
In one embodiment of the application, the device further comprises a driving module, wherein the judging signal input end of the driving module is connected with the output end of the judging module; the driving module is used for outputting a scanning signal and a data signal, and the data signal is used for controlling the first voltage and the second voltage; when the judgment signal indicates that the light-emitting unit is in an open state, acquiring a first voltage and a second voltage; when the first voltage is equal to the on level, the transmit data signal controls the first voltage to zero.
In one embodiment of the application, the apparatus further comprises a first column voltage control module; the first end of the first column voltage control module is connected with a first column signal line; the second end of the first column voltage control module is grounded; the control end of the first column voltage control module is used for receiving a data signal; the first column voltage control module is used for controlling a first voltage according to the data signal.
In one embodiment of the present application, the judging module includes an and circuit, a first input terminal of the and circuit is connected to the first column signal line, a second input terminal of the and circuit is connected to the second column signal line, and a voltage at an output terminal of the and circuit is also equal to zero when the second voltage is zero.
In one embodiment of the application, the voltage pull-up module comprises a first switching tube, a control end of the first switching tube is connected with an output end of the judging module, a first end of the first switching tube is connected with a first column signal line, and a second end of the first switching tube is connected with a second column signal line.
According to an aspect of an embodiment of the present application, there is provided a driving control method of a light emitting array including: the first input end of the judging module is connected with a first column signal line in the light emitting array; the second input end of the judging module is connected with a second column signal line adjacent to the first column signal line; the output end of the judging module is connected with the control end of the voltage pull-up module; the first end of the voltage pull-up module is connected with the first column signal line, and the second end of the voltage pull-up module is connected with the second column signal line; the method comprises the following steps:
when a first row signal line of the light emitting array receives a scanning signal at an on level, controlling a judging module to output judging signals of light emitting units corresponding to the first row signal line and the second column signal line according to a first voltage of the first column signal line and a second voltage of the second column signal line; wherein the judging signal is used for indicating the state of the light-emitting unit;
the control end of the control voltage pull-up module receives a judging signal;
when the judging signal indicates that the light emitting unit is in an open state, the control voltage pull-up module pulls up the second voltage to be equal to the first voltage.
According to an aspect of an embodiment of the present application, there is provided a display screen including: a light emitting array; and a drive control circuit of the light emitting array provided by any embodiment of the application.
In the technical scheme of the application, when a first row of signal lines of a light emitting array receive scanning signals at an on level, a judging module outputs judging signals of light emitting units corresponding to the first row of signal lines and the second column of signal lines according to first voltage and second voltage, wherein the judging signals are used for indicating the states of the light emitting units; when the judgment signal indicates that the light-emitting units are in an open state, the voltage pull-up module is used for pulling up the second voltage to be equal to the first voltage, so that micro-conduction of other light-emitting units on the first row signal lines and the second column signal lines can be avoided, the problem that cross bright lines are caused by the fact that the light-emitting units in the light-emitting array are in the open state is solved, and the display image quality of products is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. It is evident that the drawings in the following description are only some embodiments of the present application and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
Fig. 1 schematically shows a schematic diagram of a driving architecture of a light emitting array.
Fig. 2 schematically shows a schematic diagram of a driving architecture of a light emitting array.
Fig. 3 schematically illustrates a schematic structure of a driving control circuit of a light emitting array according to an embodiment of the present application.
Fig. 4 schematically illustrates a schematic structure of a driving control circuit of a light emitting array according to an embodiment of the present application.
Fig. 5 schematically illustrates a schematic structure of a driving control circuit of a light emitting array according to an embodiment of the present application.
Fig. 6 schematically shows a timing diagram of a light emitting array according to an embodiment of the present application.
Fig. 7 schematically illustrates a schematic structure of a driving control circuit of a light emitting array according to an embodiment of the present application.
Fig. 8 schematically illustrates a flowchart of a method for controlling driving of a light emitting array according to an embodiment of the present application.
Fig. 9 schematically illustrates a structural diagram of a display screen according to an embodiment of the present application.
Reference numerals illustrate: 310. a judging module; 320. a voltage pull-up module; 330. a voltage maintenance module; 340. a timing control module; 350. a driving module; 360. a first column voltage control module; 900. a display screen; 910. a light emitting array; 920. and a drive control circuit.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art.
As shown in fig. 1, the light emitting array includes a plurality of light emitting units, a plurality of row signal lines, and a plurality of column signal lines arranged in rows and columns; each row signal line is connected with the anode of the corresponding row of light-emitting units, and is used for transmitting a scanning signal to the anode of the corresponding row of light-emitting units; each column signal line is connected to the cathode of the light emitting cell of the corresponding column, and the column signal line is used for transmitting the column voltage to the cathode of the light emitting cell of the corresponding column. The scanning signal is used for controlling the voltage of the anode of the light emitting unit of each row, the scanning signal comprises an opening voltage and a closing voltage, the opening voltage is a preset voltage for controlling the light emitting unit to be turned on, and the closing voltage is a preset voltage for controlling the light emitting unit to be turned off. The data signal is used to control the column voltage of each column signal line.
Fig. 1 shows the n, n+1, n+2 rows and the 1 st, 2 nd, 3 rd columns in the light emitting array, taking the on voltage of the light emitting array as 5V and the off voltage as 3V as an example, when the scanning signal n+1 of the n+1 th row is equal to 5V and the scanning signals of the other rows are equal to 3V, the voltage of the anode of the light emitting unit on the row signal line n+1 is equal to 5V, and the voltage on the column signal line D2 is controlled to be zero by the data signal 2, at this time, if the light emitting unit L1 on the row signal line n+1 and the column signal line D2 is in the open state, the on-line voltage of the column signal line D2 cannot be pulled by the normal voltage Gao Zhishang pull (1V), then the anode voltage of the other light emitting units on the column signal line D2 is greater than the cathode voltage by 2V, and the other light emitting units on the column signal line D2 will be turned on. In addition, as shown in fig. 2, when the light emitting unit L1 is in an open state, the column voltage of other light emitting units on the row signal line n+1 is reduced due to capacitive coupling, so that the light emitting unit that is originally in a non-conductive state is in micro-conduction, thereby forming a problem of an open cross around the light emitting unit L1.
In order to solve the problem of the open cross caused by the open light emitting unit, as shown in fig. 3, the present application provides a driving control circuit of a light emitting array, the device comprising:
the first input end of the judging module 310 is connected with a first column signal line D1 in the light emitting array; a second input terminal of the judging module 310 is connected to a second column signal line D2 adjacent to the first column signal line D1; the output end of the judging module 310 is configured to output, when the first row signal line of the light emitting array receives the scan signal at the on level, a judging signal of the light emitting unit corresponding to the first row signal line and the second column signal line D2 according to the first voltage of the first column signal line D1 and the second voltage of the second column signal line D2, where the judging signal is used to indicate the state of the light emitting unit.
Specifically, when the first row signal line receives the scan signal n+1 at the on level and the light emitting unit L1 is in the normal state, if the light emitting unit L1 is controlled to emit light, the voltage of the scan signal n+1 can be transmitted to the second column signal line D2, so that the second column signal line D2 can be pulled up normally. If the light emitting unit L1 is in the open state, the voltage of the scan signal n+1 cannot be transmitted to the second column signal line D2, and the second column signal line D2 cannot be normally pulled up. In this case, whether the light emitting unit L1 on the second column signal line D2 is in an open state may be detected by the determination module 310 of the present application to determine whether the column voltage of the second column signal line D2 needs to be pulled up.
In one embodiment of the present application, as shown in fig. 5, the determining module 310 includes an and circuit, a first input terminal of the and circuit is connected to the first column signal line D1, a second input terminal of the and circuit is connected to the second column signal line D2, and a voltage at an output terminal of the and circuit is also equal to zero when the second voltage is zero.
Specifically, when the column voltage of the column signal line is normally pulled up, the column voltage is 1V; when the column voltage of the column signal line cannot be pulled up normally, the column voltage is 0V. When the first voltage is 1V and the second voltage is 0V, the output voltage of the AND gate circuit is zero. When the light emitting cells on the first column signal line D1 are controlled not to emit light, the first voltage is 5V while the second voltage is 0V, and then the and circuit output voltage is also zero, it will be understood that the present application solves the problem of an open-circuit cross, that is, the light emitting cells adjacent to the light emitting cells in an open state are normal, and thus the first voltage includes both cases of 1V and 5V.
In other embodiments of the present application, the voltage at the output of the determining module 310 is equal to a high level when the second voltage is zero, and the determining module may be implemented by other logic gates, such as one or more of an or gate, a nor gate, and a nand gate, which is not limited by the present application.
The voltage pull-up module 320, the control end of the voltage pull-up module 320 is configured to receive a determination signal, the first end of the voltage pull-up module 320 is connected to the first column signal line D1, and the second end of the voltage pull-up module 320 is connected to the second column signal line D2; the voltage pull-up module 320 is configured to pull up the second voltage to be equal to the first voltage when the determination signal indicates that the light emitting unit L1 is in the open state.
Specifically, when the first row signal line receives the scan signal n+1 at the on level, if the light emitting unit L0 located on both the first row signal line and the first column signal line D1 normally emits light, the column voltage (i.e., the first voltage) of the first column signal line D1 may be normally pulled up. Therefore, when the judgment signal indicates that the light emitting unit L1 is in the open state, the voltage pull-up module 320 transfers the first voltage to the second column signal line D2 so that the second voltage is pulled up to be equal to the first voltage.
In the technical scheme of the application, when a first row of signal lines of a light emitting array receive scanning signals at an on level, a judging module outputs judging signals of light emitting units corresponding to the first row of signal lines and the second column of signal lines according to first voltage and second voltage, wherein the judging signals are used for indicating the states of the light emitting units; when the judgment signal indicates that the light-emitting units are in an open state, the voltage pull-up module is used for pulling up the second voltage to be equal to the first voltage, so that micro-conduction of other light-emitting units on the first row signal lines and the second column signal lines can be avoided, the problem that cross bright lines are caused by the fact that the light-emitting units in the light-emitting array are in the open state is solved, and the display image quality of products is improved.
In one embodiment of the present application, as shown in fig. 5, the voltage pull-up module 320 includes a first switching tube, a control end of the first switching tube is connected to an output end of the judging module 310, a first end of the first switching tube is connected to the first column signal line D1, and a second end of the first switching tube is connected to the second column signal line D2.
Specifically, the first switching tube may be a P-type mos tube or an N-type mos tube. When the first switching tube is a P-type mos tube, the first switching tube is turned on at a low level, so that the judgment signal is zero when the second voltage is zero. When the second voltage is equal to zero, the second column signal line D2 cannot be pulled up normally, the judging module 310 transmits the judging signal to the control end of the first switching tube, and the first switching tube is turned on, so that the first voltage is transmitted to the second column signal line D2, and the second voltage is pulled up to be equal to the first voltage. When the second voltage is not equal to zero, the second column signal line D2 is pulled up normally, and the signal is determined to be at a high level, so that the first switch tube cannot be turned on, and the first voltage cannot be transmitted to the second column signal line D2, and the voltage pull-up module 320 is triggered to transmit the first voltage to the second column signal line when the second voltage of the second column signal line cannot be pulled up normally.
In other embodiments of the present application, the voltage pull-up module may also take other circuit configurations, which the present application is not limited to.
In one embodiment of the present application, as shown in fig. 4, the apparatus further includes a voltage maintaining module 330, an input end of the voltage maintaining module 330 is configured to receive an initial determination signal, an output end of the voltage maintaining module 330 is connected to a control end of the voltage pull-up module 320, and a control end of the voltage maintaining module 330 is configured to receive a first timing signal; the voltage maintaining module 330 is configured to control the voltage at the output terminal of the voltage maintaining module 330 to be equal to the initial judging signal within the pulse duration of the first timing signal according to the first timing signal and the initial judging signal.
Specifically, after the second voltage is pulled up by the voltage pull-up module 320, the current judgment signal output by the judgment module 310 is not equal to zero after the second voltage is pulled up, and if the voltage pull-up module 320 is turned on at a low level and turned off at a high level, the voltage pull-up module 320 stops transmitting the first voltage to the second column signal line D2, the second voltage returns to zero, and the current judgment signal changes to zero again, so that the voltage pull-up module 320 is frequently in an on or off state, resulting in a second voltage jump. The voltage maintaining module 330 in this embodiment belongs to a clock control trigger, and the clock control trigger is characterized in that the trigger changes the output state at the rising edge or the falling edge of the clock signal. The first timing signal is a clock signal that triggers the voltage maintaining module 330 to change the output state, and the voltage maintaining module 330 outputs a corresponding voltage according to the initial determination signal at a rising edge or a falling edge of the first timing signal. During the pulse duration of the first timing signal, even if the current determination signal is continuously changed, the output of the voltage maintaining module 330 is not affected, and the state of the voltage pull-up module 320 is not affected, so that the voltage pull-up module 320 can continuously pull up the second voltage.
In one embodiment of the present application, as shown in fig. 5, the voltage maintaining module 330 includes a D flip-flop, an input terminal D of the D flip-flop is configured to receive the initial determination signal, an output terminal Q of the D flip-flop is connected to a control terminal of the voltage pull-up module 320, and a control terminal CLK of the D flip-flop is configured to receive the first timing signal.
Specifically, if the D flip-flop changes the output state when the rising edge of the first timing signal is set, and the initial judgment signal is zero at this time, before the rising edge of the next first timing signal arrives, even if the current judgment signal continuously jumps, the output of the D flip-flop is equal to zero, and the voltage pull-up module 320 can stably work to continuously pull up the second voltage, so as to avoid continuous flickering of the light emitting unit.
In other embodiments of the present application, the voltage maintaining module may also adopt a combination of one or more of other flip-flops, such as an R-S flip-flop, a J-K flip-flop, and a T flip-flop, and make a corresponding modification to the voltage pull-up module, which is not limited by the present application.
In one embodiment of the present application, the pulse duration of the first timing signal is equal to the pulse duration of the data signal 2 corresponding to the second column signal line D2, and the data signal 2 is used to control the duration in which the second voltage is pulled up.
Specifically, the second voltage should be pulled up during the pulse duration of the data signal 2 corresponding to the second column signal line D2. Therefore, in order to ensure that the second voltage is continuously pulled up for the pulse duration of the corresponding data signal 2, the start time of the first timing signal is the same as the start time of the data signal 2 corresponding to the second column signal line D2, and the end time of the first timing signal is the same as the end time of the data signal 2 corresponding to the second column signal line D2, i.e., the pulse duration of the first timing signal is equal to the pulse duration of the data signal 2 corresponding to the second column signal line D2.
In one embodiment of the present application, as shown in fig. 4, the apparatus further includes a timing control module 340, the timing control module 340 for controlling the time of transmitting the scan signal and the data signal, and transmitting the first timing signal; wherein the data signal is used to control the first voltage and the second voltage.
Specifically, a timing control module (Timing Controller, TCON) converts a video signal obtained from the main board into a data signal format required by the driving module, thereby controlling the time at which the driving module transmits the scan signal and the data signal; in addition, the timing control module 340 is further configured to send the first timing signal, and the timing control module 340 controls the pulse duration of the first timing signal to be equal to the pulse duration of the data signal 2 corresponding to the second column signal line D2. As shown in fig. 6, in the pulse duration Tn of the scan signal n, since there is no open-circuited light emitting unit on the row signal line corresponding to the scan signal n, the timing control module does not transmit the first timing signal, and the light emitting unit on the row signal line corresponding to the scan signal n determines the light emitting duration of the corresponding light emitting unit according to the pulse durations of the data signals such as the data signal 1, the data signal 2, and the data signal 3. In the pulse duration tn+1 of the scan signal n+1, since the light emitting unit L1 on the row signal line corresponding to the scan signal n+1 is in an open state, the timing control module transmits the first timing signal to control the output of the voltage maintaining module during the pulse duration of the data signal 2, and the light emitting duration of the other light emitting units on the second column signal line D2 is not affected by the first timing signal.
In one embodiment of the present application, as shown in fig. 7, the apparatus provided by the present application further includes a driving module 350, where a judgment signal input end of the driving module 350 is connected to an output end of the judgment module 310; the driving module 350 is used for outputting a scan signal and a data signal, and the data signal is used for controlling the first voltage and the second voltage; when the judgment signal indicates that the light emitting unit L1 is in an open state, acquiring a first voltage and a second voltage; when the first voltage is equal to the on level, the transmit data signal 1 controls the first voltage to zero.
Specifically, when the judgment signal indicates that the light emitting unit L1 is in the open state, the driving module 350 obtains the first voltage and the second voltage to determine the magnitude of the first voltage at this time. As described above, the first voltage of the first column signal line D1 may be a pull-up voltage or an on voltage, when the first voltage is equal to the on voltage, the light emitting unit on the first column signal line D1 does not emit light, and at this time, the driving module 350 sends the data signal 1 corresponding to the first column signal line D1 to control the light emitting units on the first column signal line D1 and the first row signal line to emit light, so that the display effect affected by the light emitting unit L1 not emitting light can be compensated without affecting the transmission of the first voltage to the second column signal line D2.
In one embodiment of the application, as shown in FIG. 7, the apparatus further comprises a first column voltage control module 360; a first end of the first column voltage control module 360 is connected to the first column signal line D1; the second end of the first column voltage control module 360 is grounded; the control terminal of the first column voltage control module 360 is configured to receive the data signal 1; the first column voltage control module 360 is used for controlling the first voltage according to the data signal 1.
Specifically, when the first row signal line receives the scan signal and the control end of the first column voltage control module 360 receives the data signal 1, the first column voltage control module 360 is in the on state, and the light emitting unit L0 on the first column signal line D1 is in the light emitting state. In addition, the display gray scale of the corresponding region can be adjusted by adjusting the pulse duration of the data signal 1 corresponding to the first column signal line D1. It should be understood that each column signal line is connected to a corresponding column voltage control module to control the light emitting duration of the light emitting units on each column signal line by the duty ratio of the data signal.
For example, the first column voltage control module 360 includes a second switching transistor, which may be a P-type mos transistor or an N-type mos transistor. When the data signal 1 is a low pulse to control the first column voltage control module 360, the second switching transistor may be a P-type mos transistor, which is in a conductive state when receiving the data signal 1 at a low level, so that the light emitting unit receiving the scan signal on the first column signal line D1 is in a light emitting state.
In other embodiments, the first column voltage control module may also take other circuit configurations, which the present application is not limited to.
As shown in fig. 8, the present application provides a driving control method of a light emitting array, the light emitting array comprising: the first input end of the judging module is connected with a first column signal line in the light emitting array; the second input end of the judging module is connected with a second column signal line adjacent to the first column signal line; the output end of the judging module is connected with the control end of the voltage pull-up module; the first end of the voltage pull-up module is connected with the first column signal line, and the second end of the voltage pull-up module is connected with the second column signal line; the method includes S810 to S830:
s810, when a first row signal line of the light emitting array receives a scanning signal at an on level, controlling a judging module to output judging signals of light emitting units corresponding to the first row signal line and the second column signal line according to a first voltage of the first column signal line and a second voltage of the second column signal line; wherein the judging signal is used for indicating the state of the light-emitting unit;
s820, a control end of the control voltage pull-up module receives a judging signal;
and S830, when the judging signal indicates that the light emitting unit is in an open state, the control voltage pull-up module pulls up the second voltage to be equal to the first voltage.
Specific details of the driving control method of the light emitting array provided in the present application have been described in the corresponding related embodiments, and are not described herein.
As shown in fig. 9, the present application provides a display screen 900, the display screen 900 including: a light emitting array 910; and a drive control circuit 920 for a light emitting array according to any of the embodiments of the present application.
Specifically, when the light emitting array 910 used in the backlight of the display screen 900 is a Mini LED array, if an open circuit occurs in an individual light emitting unit in the light emitting array 910, the column voltage of the column where the open circuit light emitting unit is located can be adjusted to the pull-up voltage by the driving control circuit 920 in the present application, so that the problem that an open circuit cross appears due to micro-conduction with other light emitting units located in the same row and the same column as the open circuit light emitting unit is avoided, and the display image quality of the display screen is improved.
Specific details of the driving control circuit of the light emitting array provided in the present application have been described in the corresponding related embodiments, and are not described herein.
Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains.
It is to be understood that the application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (9)
1. A drive control circuit for a light emitting array, the circuit comprising:
the first input end of the judging module is connected with a first column signal line in the light emitting array; the second input end of the judging module is connected with a second column signal line adjacent to the first column signal line; the output end of the judging module is used for outputting judging signals of the light emitting units corresponding to the first row signal line and the second column signal line according to the first voltage of the first column signal line and the second voltage of the second column signal line when the first row signal line of the light emitting array receives a scanning signal at an on level, wherein the judging signals are used for indicating the states of the light emitting units;
the input end of the voltage maintenance module is used for receiving the judging signal, and the control end of the voltage maintenance module is used for receiving a first timing signal; the voltage maintaining module is used for controlling the voltage of the output end of the voltage maintaining module to be equal to the judging signal within the pulse duration of the first time sequence signal according to the first time sequence signal and the judging signal;
the control end of the voltage pull-up module is connected with the output end of the voltage maintaining module, the first end of the voltage pull-up module is connected with the first column signal line, and the second end of the voltage pull-up module is connected with the second column signal line; the voltage pull-up module is used for pulling up the second voltage to be equal to the first voltage when the judging signal indicates that the light-emitting unit is in an open state.
2. The drive control circuit of a light-emitting array according to claim 1, wherein a pulse duration of the first timing signal is equal to a pulse duration of a data signal corresponding to the second column signal line, the data signal being for controlling a period in which the second voltage is pulled up.
3. The drive control circuit of a light emitting array according to claim 2, further comprising a timing control module for controlling a time of transmitting the scan signal and the data signal, and transmitting the first timing signal.
4. The drive control circuit of a light emitting array of claim 1, further comprising: the judging signal input end of the driving module is connected with the output end of the judging module;
the driving module is used for outputting the scanning signal and the data signal, and the data signal is used for controlling the first voltage and the second voltage; when the judging signal indicates that the light emitting unit is in an open state, the first voltage and the second voltage are obtained; when the first voltage is equal to an on level, the data signal is sent to control the first voltage to be zero.
5. The drive control circuit of a light emitting array of claim 4, further comprising: a first column voltage control module; the first end of the first column voltage control module is connected with the first column signal line; the second end of the first column voltage control module is grounded; the control end of the first column voltage control module is used for receiving the data signal; the first column voltage control module is used for controlling the first voltage according to the data signal.
6. The driving control circuit of a light emitting array according to claim 1, wherein the judging module comprises an and circuit, a first input terminal of the and circuit is connected to the first column signal line, a second input terminal of the and circuit is connected to the second column signal line, and a voltage of an output terminal of the and circuit is equal to zero when the second voltage is zero.
7. The driving control circuit of the light emitting array according to claim 1, wherein the voltage pull-up module comprises a first switching tube, a control end of the first switching tube is connected to an output end of the judging module, a first end of the first switching tube is connected to the first column signal line, and a second end of the first switching tube is connected to the second column signal line.
8. A driving control method of a light emitting array, characterized in that the light emitting array comprises: the first input end of the judging module is connected with a first column signal line in the light emitting array; the second input end of the judging module is connected with a second column signal line adjacent to the first column signal line; the output end of the judging module is connected with the input end of the voltage maintaining module; the control end of the voltage maintenance module is used for receiving a first timing signal; the output end of the voltage maintaining module is connected with the control end of the voltage pull-up module; the first end of the voltage pull-up module is connected with the first column signal line, and the second end of the voltage pull-up module is connected with the second column signal line; the method comprises the following steps:
when a first row signal line of the light emitting array receives a scanning signal at an on level, controlling the judging module to output judging signals of light emitting units corresponding to the first row signal line and the second column signal line according to a first voltage of the first column signal line and a second voltage of the second column signal line; wherein the judging signal is used for indicating the state of the light-emitting unit;
according to the first timing signal and the judging signal, controlling the voltage of the output end of the voltage maintaining module to be equal to the judging signal within the pulse duration of the first timing signal;
and when the judging signal indicates that the light emitting unit is in an open circuit state, controlling the voltage pull-up module to pull up the second voltage to be equal to the first voltage.
9. A display screen, comprising:
a light emitting array; and
a drive control circuit of a light emitting array according to any one of claims 1 to 7.
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| CN202311079508.0A CN116825030B (en) | 2023-08-25 | 2023-08-25 | Driving control circuit of light emitting array, driving control method of driving control circuit and display screen |
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| CN116825030A (en) | 2023-09-29 |
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