CN114038396B - Drive compensation circuit, display device and drive method of display unit - Google Patents

Drive compensation circuit, display device and drive method of display unit Download PDF

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Publication number
CN114038396B
CN114038396B CN202110943602.0A CN202110943602A CN114038396B CN 114038396 B CN114038396 B CN 114038396B CN 202110943602 A CN202110943602 A CN 202110943602A CN 114038396 B CN114038396 B CN 114038396B
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control
display unit
data line
signal
driving
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CN114038396A (en
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向毅
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Chongqing Kangjia Optoelectronic Technology Co ltd
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Chongqing Kangjia Photoelectric Technology Research Institute Co Ltd
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Priority to CN202110943602.0A priority Critical patent/CN114038396B/en
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Priority to PCT/CN2022/111404 priority patent/WO2023020348A1/en
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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]
    • 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]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The invention provides a driving compensation circuit, a display device and a driving method of a display unit, wherein the driving compensation circuit comprises a signal control unit, a signal input unit and a first control switch, when the luminance of the display unit exceeds a threshold value, a first control signal is sent out by the signal control unit to conduct the first control switch, so that the signal input unit changes the driving voltage for driving the display unit, the display unit does not emit light within the time of the first control signal, the luminance of the display unit is reduced, the problem that the luminance of the display unit is slightly bright is avoided, and the integral display uniformity of the display unit is improved when a plurality of display units are provided.

Description

Drive compensation circuit, display device and drive method of display unit
Technical Field
The present invention relates to the field of semiconductor devices, and in particular, to a driving compensation circuit, a display device, and a driving method of a display unit.
Background
The Light-Emitting Diode (LED) and Mini-LED display technology has the advantages of high brightness, high response speed, low power consumption, long service life and the like, can be applied to the professional fields such as monitoring and commanding, high-definition broadcasting, high-end cinema, medical detection and the like or the commercial fields such as outdoor advertising, conference exhibition, office display and the like, and becomes a research hotspot for pursuing a new generation of display technology by people.
With the development of small spacing, the LED display screen has made higher requirements for line driving, from the current switching of a pure P-MOSFET (P-type Metal Oxide Semiconductor Field Effect Transistor) to the multifunctional line driving with higher integration and stronger function, the current problems of uneven brightness transition of display units and poor display uniformity (bright, dark) easily occur in line driving due to the influence of capacitors in the display panel, etc.
Therefore, how to improve the display uniformity in the row driving is an urgent problem to be solved.
Disclosure of Invention
In view of the above-mentioned shortcomings of the related art, the present application aims to provide a driving compensation circuit, a display device and a driving method of a display unit, which aims to solve the problems that the brightness transition of the display unit is not uniform and the display uniformity is poor easily caused by the conventional line driving.
A drive compensation circuit, the drive compensation circuit comprising: the device comprises a signal control unit, a signal input unit and a first control switch; the signal control unit is connected with the control end of the first control switch, the signal input unit is connected with the first end of the first control switch, the second end of the first control switch is connected with the output end of a driving data line of the display unit, and the output end of the driving data line is used for outputting driving voltage to drive the display unit to emit light; the signal control unit outputs a first control signal to the control end when the luminous brightness of the display unit exceeds a threshold value, and the control end conducts the first end and the second end when receiving the first control signal; when the first end and the second end of the signal input unit are conducted, the driving voltage is changed to control the display unit not to emit light; and the signal control unit outputs a second control signal to the control end when the luminous brightness of the display unit does not exceed a threshold value, and the control end cuts off the first end and the second end when receiving the second control signal.
Above-mentioned drive compensation circuit, including the signal control unit, the signal input unit, first control switch, when the luminous luminance of display element surpassed the threshold value, send first control signal through the signal control unit and switch on first control switch, make the signal input unit change the drive voltage who drives the display element, and then make the display element not luminous in the time of first control signal, the luminance of display element has been reduced, the problem that the luminance of display element is bright partially has been avoided, when having a plurality of display elements, the holistic demonstration homogeneity of display element has been promoted.
Optionally, the driving data line includes: a row pipe data line or a column pipe data line; the second end of the first control switch is connected with the output end of the driving data line of the display unit, and the second end of the first control switch comprises: the second end is connected with the output end of the row pipe data line, or the second end is connected with the output end of the column pipe data line.
Optionally, the signal control unit includes: a time schedule controller; the time sequence controller is used for outputting at least one first control signal within a period range that the luminous brightness of the display unit exceeds a threshold value and the driving voltage output by the tube array data line is low; the time schedule controller is further used for outputting the second control signal when the light-emitting brightness of the display unit does not exceed a threshold value, and the first control signal and the second control signal are opposite signals.
Optionally, the signal input unit includes: a reference voltage module to output a reference voltage; when the second end is connected with the output end of the row pipe data line, the reference voltage is lower than the driving voltage; when the second terminal is connected to the output terminal of the column pipe data line, the reference voltage is higher than the driving voltage.
Optionally, the signal input unit further includes: and the reference voltage module is connected with the output end of the driving data line through the discharge speed control module.
Optionally, the first control switch comprises: a field effect transistor; the field effect transistor is connected between the output end of the row tube data line and the signal input unit; the output end of the signal control unit is connected with the control end of the field effect transistor, the first end of the field effect transistor is connected with the output end of the signal input unit, and the second end of the field effect transistor is connected with the output end of the row tube data line, so that when the field effect transistor is switched on, a voltage signal output by the output end of the row tube data line flows to the signal input unit, the driving voltage is reduced, and the display unit is controlled not to emit light; or, the field effect transistor is connected between the output end of the column tube data line and the signal input unit; the output end of the signal control unit is connected with the control end of the field effect transistor, the second end of the field effect transistor is connected with the output end of the signal input unit, and the first end of the field effect transistor is connected with the output end of the column tube data line, so that when the field effect transistor is switched on, the reference voltage output by the signal input unit flows to the output end of the column tube data line, and the driving voltage is increased to control the display unit not to emit light.
Based on the same inventive concept, the present application also provides a display device, including a plurality of driving data lines, each of the driving data lines including: a row pipe data line and a column pipe data line; a display unit is arranged between the row tube data lines and the column tube data lines, and the output end of at least one data line in the driving data lines is provided with the driving compensation circuit.
Above-mentioned display device, through the signal control unit among the drive compensating circuit, the signal input unit, first control switch, when the luminance of display element surpassed the threshold value, send first control signal through the signal control unit and switch on first control switch, make the signal input unit change the drive voltage who drives the display element, and then make the display element not luminous in the time of first control signal, the luminance of display element has been reduced, the problem that the luminance of display element is bright partially has been avoided, when having a plurality of display elements, the holistic demonstration homogeneity of display element has been promoted.
Optionally, the display unit comprises a red light display unit, a green light display unit and a blue light display unit; or the display unit comprises a red light display unit, a green light display unit, a blue light display unit and a yellow light display unit.
Based on the same inventive concept, the present application also provides a driving method of a display unit, applied to the driving compensation circuit, the driving method of the display unit including: when the luminance of the display unit exceeds a threshold value, a first control signal is output to a control end of a first control switch through a signal control unit; when the control end receives the first control signal, the first end and the second end of the first control switch are conducted; the signal input unit changes the driving voltage of the display unit when the first end and the second end are conducted so as to control the display unit not to emit light.
According to the driving method of the display unit, the first control signal is sent out when the luminance of the display unit exceeds the threshold value so as to change the driving voltage for driving the display unit, and further the display unit does not emit light within the time of the first control signal, so that the luminance of the display unit is reduced, the problem that the luminance of the display unit is slightly bright is avoided, and the overall display uniformity of the display unit is improved when a plurality of display units are provided.
Optionally, the driving method of the display unit further includes: outputting a second control signal to the control end through the signal control unit when the luminous brightness of the display unit does not exceed a threshold value; and when the control end receives the second control signal, the first end and the second end are cut off.
Drawings
Fig. 1 is a waveform diagram of switching control signals of a Row pipe data line Row and a column pipe data line Out according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a display unit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating a display unit affected by a capacitor according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a basic structure of a driving compensation circuit according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a basic structure of a driving compensation circuit connected to an output terminal of a row pipe data line according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a basic structure of a driving compensation circuit connected to an output end of a data line of a column tube according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a basic structure of a signal control unit according to an embodiment of the present invention;
FIG. 8 is a schematic diagram illustrating a signal control unit sending a first control signal to change a driving voltage according to an embodiment of the present invention;
fig. 9 is a basic schematic diagram illustrating a signal control unit generating two first control signals to change a driving voltage according to an embodiment of the present invention;
fig. 10 is a schematic diagram of a basic structure of a signal input unit according to an embodiment of the present invention;
FIG. 11 is a schematic diagram of a basic structure of a first control switch according to an embodiment of the present invention
Fig. 12 is a schematic basic flowchart of a driving method of a display unit according to another alternative embodiment of the present invention;
description of reference numerals:
the device comprises a 1-driving compensation circuit, an 11-signal control unit, a 12-signal input unit, a 13-first control switch, a 2-display unit, a 111-time schedule controller, a 121-reference voltage module, a 122-discharge speed control module, a Row-Row pipe data line and an Out-column pipe data line.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
In the related art, with the development of small pitch, the LED display panel puts higher requirements on the line driving, which is introduced from the implementation of line switching by a simple P-MOSFET to the multifunctional line driving with higher integration and stronger function, only with the common anode of the display unit (the display unit is illustrated as an LED) (i.e., the anode of the display unit is on the data line Row of the column transistor), as shown in fig. 1, fig. 1 is a waveform diagram of the switching control signals of the data line Row and the data line Out of the column transistor, when the control signal of the data line Row (n + 1) is low, the driving voltage on the data line Row (i.e., the anode voltage of the display unit) is pulled high, and when the control signal of the data line Out on the Driver IC is low, the driving voltage on the data line column transistor (i.e., the voltage on the cathode of the display unit) is pulled low, and at this time, the display unit between the data line Row transistor and the data line column transistor is displayed to emit light; when the widths of the control signals of the column pipe data lines Out are different, the luminances of different display units can be obtained, as shown in fig. 2, but due to the existence of parasitic capacitances, as shown in fig. 3, for example, the parasitic capacitances of the display units, between the row pipe data lines and the grounding point GND, and between the column pipe data lines and between the pipe data lines and the grounding point GND, the luminance transition (i.e., displaying multiple continuous gray scales, such as 0-255 gray scales simultaneously) can be affected, resulting in poor display uniformity (bright, dark and dark).
Based on this, the present application intends to provide a solution to the above technical problem, the details of which will be explained in the following embodiments.
Examples of the invention
An embodiment of the present invention provides a driving compensation circuit 1, as shown in fig. 4, where the driving compensation circuit 1 includes: a signal control unit 11, a signal input unit 12, a first control switch 13; the signal control unit 11 is connected to a control end of the first control switch 13, the signal input unit 12 is connected to a first end of the first control switch 13, a second end of the first control switch 13 is connected to an output end of a driving data line of the display unit 2, and the output end of the driving data line is used for outputting a driving voltage to drive the display unit 2 to emit light; the signal control unit 11 outputs a first control signal to the control terminal when the luminance of the display unit 2 exceeds a threshold, and the control terminal conducts the first terminal and the second terminal when receiving the first control signal; when the first end and the second end are conducted, the signal input unit 12 changes the driving voltage to control the display unit 2 not to emit light; when the luminance of the display unit 2 does not exceed the threshold, the signal control unit 11 outputs a second control signal to the control end, and the control end stops the first end and the second end when receiving the second control signal.
The driving compensation circuit provided by the embodiment comprises a signal control unit, a signal input unit, a first control switch, when the luminance of the display unit exceeds a threshold value, a first control signal is sent out through the signal control unit to switch on the first control switch, the signal input unit changes the driving voltage for driving the display unit, and further the display unit does not emit light within the time of the first control signal, the luminance of the display unit is reduced, the problem that the luminance of the display unit is slightly bright is avoided, when a plurality of display units are arranged, the integral display uniformity of the display unit is improved.
It should be understood that there are various methods of identifying whether the light emission luminance of the display unit 2 exceeds the threshold, for example, the light emission luminance may be monitored by a sensor to identify whether the light emission luminance of the display unit 2 exceeds the threshold; or when the related designer performs debugging externally, performing debugging on whether the light-emitting brightness exceeds the threshold value to identify whether the light-emitting brightness of the display unit 2 exceeds the threshold value, the embodiment does not limit the method for identifying whether the light-emitting brightness of the display unit 2 exceeds the threshold value, where the display unit 2 includes but is not limited to: at least one of an LED chip display unit, an Organic Light-Emitting Diode (OLED) chip display unit, a Micro LED chip display unit, a Mini LED chip display unit, and the like.
It should be understood that the display unit 2 is disposed between the Row pipe data line Row and the column pipe data line Out, wherein when the driving voltage output by the Row pipe data line Row is high and the driving voltage output by the column pipe data line is low, the display unit 2 disposed between the Row pipe data line Row and the column pipe data line Out emits light, that is, both the Row pipe data line Row and the column pipe data line Out can control the corresponding display unit 2 not to emit light; accordingly, the driving data line includes: a Row pipe data line Row, or a column pipe data line Out;
in view of the above, the driving compensation circuit 1 may be connected to the output end of the Row pipe data line Row, or may be connected to the output end of the column pipe data line Out, and specifically, the connection of the second end of the first control switch 13 to the output end of the driving data line of the display unit 2 includes: the second terminal is connected to an output terminal of the Row pipe data line Row, as shown in fig. 5, or the second terminal is connected to an output terminal of the column pipe data line Out, as shown in fig. 6; it will be appreciated that in some examples, the drive compensation circuit 1 may be provided at both the output of the column pipe data line Out and the output of the Row pipe data line Row.
Taking the above example as a bearing, in some examples, when the second end is connected to the output end of the Row pipe data line Row, the driving compensation circuit 1 may pull down the driving voltage output by the Row pipe data line Row, so that the driving voltage output by the Row pipe data line Row is low, and the driving voltage output by the column pipe data line is low, so as to make the display unit 2 not emit light; in some examples, when the second terminal is connected to the output terminal of the column pipe data line Out, the driving compensation circuit 1 may pull up the driving voltage output by the column pipe data line Out, so that the driving voltage output by the Row pipe data line Row is high, and the driving voltage output by the column pipe data line Row is high, so that the display unit 2 does not emit light within the first control signal time.
It is understood that, in the layout, the above-described drive compensation circuit 1 may be provided entirely or partially inside the drive data line; the drive compensation circuit 1 may have all the foreign words outside the drive data lines; for example, the display drive compensation circuit 1 may be entirely or partially disposed inside the pipe data line Row.
In some examples of the present embodiment, as shown in fig. 7, the signal control unit 11 includes but is not limited to: a timing controller 111; the timing controller 111 is configured to output at least one first control signal in a period range in which the luminance of the display unit 2 exceeds a threshold and the voltage of the column tube data line Out is low, for example, the driving compensation circuit 1 is connected to the output end of the Row tube data line Row, and outputs one first control signal, and pulls down the driving voltage output by the Row tube data line Row at time t, as shown in fig. 8, pulls down the waveform of the driving voltage of Row to the waveform of the driving voltage of Row ', or outputs two first control signals, pulls down the waveform of the driving voltage output by the Row tube data line Row at time t2 and time t1, as shown in fig. 9, pulls down the waveform of the driving voltage of Row to the waveform of the driving voltage of Row'; it should be understood that the width and the output position of the first control signal may vary according to the actual usage, but it is necessary to ensure that the time during which Outm is pulled low (i.e. the time during which the driving voltage of the data line Out of the column tube is low) is necessary, otherwise the effect of reducing the light emitting brightness of the display unit 2 cannot be achieved.
In some examples of the present embodiment, the timing controller 111 is further configured to output the second control signal when the light-emitting brightness of the display unit 2 does not exceed a threshold, and the first control signal and the second control signal are opposite signals.
It is needless to say that, the first control signal may be one of a high level signal and a low level signal, and when the first control signal is a high level signal, the second control signal is a low level signal, it should be understood that, the first control signal can make the first control switch 13 in an on state, and the second control signal can make the second control switch in an off state, for example, when the first control switch 13 is an N-type field effect transistor, the first control signal is a high level signal, and the second control signal is a low level signal.
In some examples of the present embodiment, the signal input unit 12 includes: a reference voltage module 121, wherein the reference voltage module 121 is configured to output a reference voltage; when the second terminal is connected to the output terminal of the Row, the reference voltage is lower than the driving voltage; when the second terminal is connected to an output terminal of the column pipe data line Out, the reference voltage is higher than the driving voltage.
It should be understood that when the driving compensation circuit 1 is connected to the output terminal of the Row pipe data line Row, the reference voltage outputted by the reference voltage module 121 may be a ground voltage, as shown in fig. 10, or a constant voltage lower than the driving voltage outputted by the Row pipe data line Row is provided by a constant voltage unit, so as to pull down the driving voltage outputted by the Row pipe data line Row, so that the display unit 2 does not emit light.
It should be understood that, when the driving compensation circuit 1 is connected to the output terminal of the column pipe data line Out, the reference voltage module 121 may be a constant voltage provided by a constant voltage unit and higher than the driving voltage output by the column pipe data line Out, so as to achieve the effect of increasing the driving voltage output by the column pipe data line Out, so that the display unit 2 does not emit light.
In some examples of the present embodiment, the signal input unit 12 further includes: a discharge speed control module 122, wherein the reference voltage module 121 is connected to an output end of the driving data line through the discharge speed control module 122; wherein the discharge rate control module 122 includes but is not limited to: resistance, as shown in fig. 10; the resistor can be a fixed resistor or a variable resistor. When the discharge speed control module 122 is a resistor, the larger the resistance value of the resistor is, the slower the change of the driving voltage is; for example, when the driving compensation circuit 1 is connected to the output end of the rowpipe data line Row, the larger the resistance is, the slower the driving voltage is pulled down, the smaller the resistance is, and the faster the driving voltage is pulled down when the signal input unit 12 is turned on between the first end and the second end.
In the above example, based on the same principle, when the driving compensation circuit 1 is connected to the output end of the column pipe data line Out, the larger the resistance is, the slower the speed of pulling up the driving voltage is when the first end and the second end of the signal input unit 12 are conducted, the smaller the resistance is, and the faster the speed of pulling up the driving voltage is. It should be understood that the discharge speed control module 122 may not be provided in the signal input unit 12, and may be provided between the signal input unit 12 and the output end of the driving data line to achieve the same effect.
In some examples of the present embodiment, as shown in fig. 11, the first control switch 13 includes, but is not limited to: a field effect transistor; wherein, when the driving compensation circuit 1 is connected to the output end of the Row pipe data line Row, the field effect transistor is connected between the output end of the Row pipe data line Row and the signal input unit 12; the output end of the signal control unit 11 is connected to the control end of the field effect transistor, the first end of the field effect transistor is connected to the output end of the signal input unit 12, and the second end of the field effect transistor is connected to the output end of the Row pipe data line Row, so that when the field effect transistor is turned on, a voltage signal output from the output end of the Row pipe data line Row flows to the signal input unit 12, and the driving voltage is reduced to control the display unit 2 not to emit light.
Bearing the above example, field effect transistors include, but are not limited to: when the N-type field effect transistor is turned on, the driving voltage output by the output end of the Row tube data line Row flows in through the drain electrode of the N-type field effect transistor, flows out of the source electrode, flows to the signal input unit 12, and then pulls down the driving voltage to control the display unit 2 not to emit light; when the field effect transistor is a P-type field effect transistor, the setting principle is similar, and the description is omitted.
In some examples of the present embodiment, wherein when the driving compensation circuit 1 is connected to the output terminal of the column pipe data line Out, the field effect transistor is connected between the output terminal of the column pipe data line Out and the signal input unit 12; the output end of the signal control unit 11 is connected to the control end of the field effect transistor, the second end of the field effect transistor is connected to the output end of the signal input unit 12, and the first end of the field effect transistor is connected to the output end of the column tube data line Out, so that when the field effect transistor is turned on, the reference voltage output by the signal input unit 12 flows to the output end of the column tube data line Out, and the driving voltage is increased to control the display unit 2 not to emit light.
Bearing the above example, field effect transistors include, but are not limited to: when the N-type field effect transistor is turned on, the reference voltage output by the signal input unit 12 flows in through the drain electrode of the N-type field effect transistor, flows Out of the source electrode, and further flows to the output end of the column tube data line Out, so that the driving voltage is pulled up to control the display unit 2 not to emit light; when the field effect transistor is a P-type field effect transistor, the setting principle is similar, and the description is omitted.
It should be understood that the present embodiment does not limit the first control switch 13 to be a field effect transistor, and the first control switch 13 may also be a switch such as a triode that can be turned on or off according to a control signal.
For better understanding of the present invention, the present embodiment provides a more specific example to illustrate the present invention, and the present example provides a driving compensation circuit 1, as shown in fig. 5, the driving compensation circuit 1 includes but is not limited to: a signal control unit 11, a signal input unit 12, a first control switch 13; the signal control unit 11 is connected to a control end of the first control switch 13, the signal input unit 12 is connected to a first end of the first control switch 13, a second end of the first control switch 13 is connected to an output end of a Row pipe data line Row of the display unit 2, and the output end of the Row pipe data line Row is used for outputting a driving voltage to drive the display unit 2 to emit light; when the luminance of the display unit 2 exceeds a threshold, the signal control unit 11 outputs a first control signal to the control end, and the control end switches on the first end and the second end when receiving the first control signal; when the first terminal and the second terminal of the signal input unit 12 are conducted, the driving voltage is pulled down by a reference voltage to control the display unit 2 not to emit light; the signal control unit 11 outputs a second control signal to the control terminal when the luminance of the display unit 2 does not exceed the threshold, and the control terminal cuts off the first terminal and the second terminal when receiving the second control signal.
Wherein the signal control unit 11 includes: a timing controller 111; the timing controller 111 is configured to output at least one first control signal in a period range in which the luminance of the display unit 2 exceeds a threshold and the voltage of the column pipe data line Out is low; the timing controller 111 is further configured to output the second control signal when the light emitting brightness of the display unit 2 does not exceed a threshold, where the first control signal and the second control signal are opposite signals. The first control signal may be one of a high level signal and a low level signal, and the second control signal is a low level signal when the first control signal is a high level signal, it should be understood that the first control signal can enable the first control switch 13 to be in an on state, and the second control signal can enable the second control switch to be in an off state, for example, when the first control switch 13 is an N-type field effect transistor, the first control signal is a high level signal, and the second control signal is a low level signal.
In some examples of the present embodiment, the signal input unit 12 includes: a reference voltage module 121, where the reference voltage module 121 is configured to output a reference voltage, where the reference voltage is lower than the driving voltage, and the reference voltage output by the reference voltage module 121 may be a ground voltage or a constant voltage provided by a constant voltage unit and lower than the driving voltage output by the Row pipe data line Row, so as to pull down the driving voltage output by the Row pipe data line Row, and the display unit 2 does not emit light.
In some examples of the present embodiment, the signal input unit 12 further includes: a discharge speed control module 122, wherein the reference voltage module 121 is connected to an output end of the driving data line through the discharge speed control module 122; wherein the discharge rate control module 122 includes, but is not limited to: and the resistor can be a fixed resistor or a variable resistor. When the discharge speed control module 122 is a resistor, the larger the resistance value of the resistor is, the slower the change of the driving voltage is; for example, when the driving compensation circuit 1 is connected to the output end of the rowtube data line Row, the larger the resistance is, the slower the driving voltage is pulled down when the signal input unit 12 is conducted between the first end and the second end, and the smaller the resistance is, the faster the driving voltage is pulled down.
The field effect transistor is connected between the output end of the Row pipe data line Row and the signal input unit 12; the output end of the signal control unit 11 is connected to the control end of the field effect transistor, the first end of the field effect transistor is connected to the output end of the signal input unit 12, and the second end of the field effect transistor is connected to the output end of the Row pipe data line Row, so that when the field effect transistor is turned on, a voltage signal output from the output end of the Row pipe data line Row flows to the signal input unit 12, and the driving voltage is reduced to control the display unit 2 not to emit light.
Bearing the above example, field effect transistors include, but are not limited to: when the N-type field effect transistor is turned on, the driving voltage output by the output end of the Row tube data line Row flows in through the drain electrode of the N-type field effect transistor, flows out of the source electrode, flows to the signal input unit 12, and then pulls down the driving voltage to control the display unit 2 not to emit light; when the field effect transistor is a P-type field effect transistor, the setting principle is similar, and the description is omitted.
Based on the same concept, the present embodiment also provides a display device, including a plurality of driving data lines, each of the driving data lines including: a Row pipe data line Row and a column pipe data line Out; a display unit 2 is arranged between the Row pipe data line Row and the column pipe data line Out, the driving compensation circuit 1 is arranged at the output end of at least one data line in the driving data lines, and the driving compensation circuit 1 can change the driving voltage output by the driving data lines, so that the light-emitting unit does not emit light.
The display unit 2 comprises a red light display unit, a green light display unit and a blue light display unit; or, the display unit 2 includes a red light display unit, a green light display unit, a blue light display unit, and a yellow light display unit.
Alternative embodiment of the invention
The present embodiment provides a driving method of a display unit, as shown in fig. 12, which includes but is not limited to:
s101, outputting a first control signal to a control end of a first control switch through a signal control unit when the luminance of the display unit exceeds a threshold value;
s102, when the control end receives the first control signal, the first end and the second end of the first control switch are conducted;
s103, when the first end and the second end are conducted, the signal input unit changes the driving voltage of the display unit to control the display unit not to emit light.
According to the driving method of the display unit, the first control signal is sent out when the luminance of the display unit exceeds the threshold value so as to change the driving voltage for driving the display unit, and further the display unit does not emit light within the time of the first control signal, so that the luminance of the display unit is reduced, the problem that the luminance of the display unit is slightly bright is avoided, and the overall display uniformity of the display unit is improved when a plurality of display units are provided.
In some embodiments, the driving method of the display unit further includes: when the brightness of the light emitted by the display unit does not exceed a threshold value, the signal control unit outputs a second control signal to the control end; and when the control end receives the second control signal, the first end and the second end are cut off.
The present embodiments also provide a computer-readable storage medium that includes volatile or non-volatile, removable or non-removable media implemented in any method or technology for storage of information such as instructions, data structures, computer program modules or other data. Computer-readable storage media include, but are not limited to, RAM (Random Access Memory), ROM (Read-Only Memory), EEPROM (Electrically Erasable Programmable Read Only Memory), flash Memory or other Memory technology, CD-ROM (Compact disk Read-Only Memory), digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer.
The computer-readable storage medium in the present embodiment may be used to store one or more computer programs, and the stored one or more computer programs may be executed by a processor to implement at least one step of the driving method of the display unit described above.
It will be apparent to those skilled in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software (which may be implemented in computer program code executable by a computing device), firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit.
In addition, communication media typically embodies instructions, data structures, computer program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as is well known to those of ordinary skill in the art. Thus, the present invention is not limited to any specific combination of hardware and software.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.

Claims (10)

1. A drive compensation circuit, comprising:
the device comprises a signal control unit, a signal input unit and a first control switch;
the signal control unit is connected with the control end of the first control switch, the signal input unit is connected with the first end of the first control switch, the second end of the first control switch is connected with the output end of a driving data line of the display unit, and the output end of the driving data line is used for outputting driving voltage to drive the display unit to emit light;
when the luminance of the display unit exceeds a threshold value, the signal control unit outputs a first control signal to the control end, and the control end conducts the first end and the second end when receiving the first control signal; when the first end and the second end are conducted, the signal input unit changes the driving voltage to control the display unit not to emit light; and the signal control unit outputs a second control signal to the control end when the luminous brightness of the display unit does not exceed a threshold value, and the control end cuts off the first end and the second end when receiving the second control signal.
2. The drive compensation circuit of claim 1, wherein the drive data line comprises: a row pipe data line or a column pipe data line;
the second end of the first control switch is connected with the output end of the driving data line of the display unit, and the second end of the first control switch comprises: the second end is connected with the output end of the row pipe data line, or the second end is connected with the output end of the column pipe data line.
3. The drive compensation circuit of claim 2, wherein the signal control unit comprises: a time schedule controller;
the time sequence controller is used for outputting at least one first control signal within a period range that the luminous brightness of the display unit exceeds a threshold value and the driving voltage output by the tube array data line is low;
the time schedule controller is further used for outputting the second control signal when the light-emitting brightness of the display unit does not exceed a threshold value, and the first control signal and the second control signal are opposite signals.
4. The drive compensation circuit of claim 3, wherein the signal input unit comprises:
a reference voltage module to output a reference voltage;
when the second end is connected with the output end of the row pipe data line, the reference voltage is lower than the driving voltage;
when the second terminal is connected to the output terminal of the column pipe data line, the reference voltage is higher than the driving voltage.
5. The drive compensation circuit of claim 4, wherein the signal input unit further comprises:
and the reference voltage module is connected with the output end of the driving data line through the discharge speed control module.
6. The drive compensation circuit of any one of claims 2-4, wherein the first control switch comprises: a field effect transistor;
the field effect transistor is connected between the output end of the row tube data line and the signal input unit; the output end of the signal control unit is connected with the control end of the field effect transistor, the first end of the field effect transistor is connected with the output end of the signal input unit, and the second end of the field effect transistor is connected with the output end of the row tube data line, so that when the field effect transistor is switched on, a voltage signal output by the output end of the row tube data line flows to the signal input unit, the driving voltage is reduced, and the display unit is controlled not to emit light;
or the like, or, alternatively,
the field effect transistor is connected between the output end of the column tube data line and the signal input unit; the output end of the signal control unit is connected with the control end of the field effect transistor, the second end of the field effect transistor is connected with the output end of the signal input unit, and the first end of the field effect transistor is connected with the output end of the column tube data line, so that when the field effect transistor is switched on, the reference voltage output by the signal input unit flows to the output end of the column tube data line, and the driving voltage is increased to control the display unit not to emit light.
7. A display device, comprising a plurality of driving data lines, each driving data line comprising: a row pipe data line and a column pipe data line;
a display unit is arranged between the row pipe data line and the column pipe data line, and an output end of at least one of the driving data lines is provided with the driving compensation circuit according to any one of claims 1 to 6.
8. The display device of claim 7, wherein the display unit includes a red display unit, a green display unit, and a blue display unit;
or the like, or a combination thereof,
the display unit comprises a red light display unit, a green light display unit, a blue light display unit and a yellow light display unit.
9. A driving method of a display unit applied to the drive compensation circuit according to any one of claims 1 to 6, the driving method of the display unit comprising:
when the luminance of the display unit exceeds a threshold value, a first control signal is output to a control end of a first control switch through a signal control unit;
when the control end receives the first control signal, the first end and the second end of the first control switch are conducted;
the signal input unit changes the driving voltage of the display unit when the first end and the second end are conducted so as to control the display unit not to emit light.
10. The method of driving a display unit according to claim 9, further comprising:
outputting a second control signal to the control end through the signal control unit when the luminous brightness of the display unit does not exceed a threshold value;
and when the control end receives the second control signal, the first end and the second end are cut off.
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