CN114038397A - Drive compensation circuit, display device, and method for driving display unit - Google Patents
Drive compensation circuit, display device, and method for driving display unit Download PDFInfo
- Publication number
- CN114038397A CN114038397A CN202110949075.4A CN202110949075A CN114038397A CN 114038397 A CN114038397 A CN 114038397A CN 202110949075 A CN202110949075 A CN 202110949075A CN 114038397 A CN114038397 A CN 114038397A
- Authority
- CN
- China
- Prior art keywords
- voltage
- signal
- circuit
- display unit
- driving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 31
- 230000003321 amplification Effects 0.000 claims description 8
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 24
- 230000005540 biological transmission Effects 0.000 abstract description 7
- 230000005669 field effect Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 239000003990 capacitor Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
-
- 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
Landscapes
- 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 present invention relates to a drive compensation circuit applied to a display device including a plurality of display cells, by applying a voltage to a first voltage signal, detecting the actual voltage of the display unit to obtain a second voltage signal, and obtaining a difference voltage signal according to the first voltage signal and the second voltage signal, then the difference voltage signal is converted into a difference digital signal and then sent to a main control chip so that the main control chip carries out voltage compensation according to the difference digital signal, the digital signal is used between the main control chip and the driving chip to replace analog quantity transmission, the signal is stable and accurate, the problem that the analog signal is easily interfered inaccurately when being output is solved, and the effect of eliminating certain difference of brightness among different display units is achieved.
Description
Technical Field
The present invention relates to the field of semiconductor display technologies, and in particular, to a driving compensation circuit, a display device, and a driving method of a display unit.
Background
In the related art, a Micro Light-Emitting Diode (Micro LED) display panel has good stability, a long service life, and advantages of operating temperature, and meanwhile, the Micro LED display panel also has advantages of low power consumption, color saturation, fast reaction speed, and strong contrast, etc. of the LED (Light-Emitting Diode, LED), and has a great application prospect.
Therefore, it is an urgent problem to avoid uneven light emission of the display cells in the display devices such as the display panel.
Disclosure of Invention
In view of the above-mentioned deficiencies 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 problem that in the related art, when the display device displays the same image, the brightness of different display units has a certain difference, and the difference may cause a reduction in display effect, even cause a non-uniform light emission (mura), and cause a poor product.
A driving compensation circuit applied to a display device including a plurality of display units, the driving compensation circuit comprising: each driving chip is connected with at least one display unit; the main control chip is connected with the plurality of driving chips; when receiving a first digital signal transmitted by the main control chip, each driving chip converts the first digital signal into a first voltage signal and drives the display unit to display according to the first voltage signal; when the display unit displays according to the first voltage signal, each driving chip detects the display unit to obtain a second voltage signal, and the first voltage signal is compared with the second voltage signal to obtain a difference voltage signal; each driving chip converts the difference voltage signal into a difference digital signal and transmits the difference digital signal to the main control chip; and the main control chip receives the difference digital signals and outputs voltage compensation digital signals to each driving chip according to the difference digital signals.
The driving chip in the driving compensation circuit detects the actual voltage of the display unit to obtain a second voltage signal when the display unit displays according to the first voltage signal, obtains a difference voltage signal according to the first voltage signal and the second voltage signal, converts the difference voltage signal into a difference digital signal and sends the difference digital signal to the main control chip so that the main control chip performs voltage compensation according to the difference digital signal, wherein the main control chip and the driving compensation circuit use digital signals to replace analog quantity transmission, the signals are stable and accurate, the problem that the analog signals are easy to be interfered and inaccurate when being output is solved, and meanwhile, the driving compensation circuit detects the voltage of the display unit and transmits the voltage to the main control chip through the digital signal so as to perform voltage compensation according to the difference digital signal to achieve the compensation effect, the display unit has the advantages that certain difference in brightness among different display units is eliminated, the display effect is reduced due to the difference, even the phenomenon of uneven light emission is formed, the bad effect of products is caused, extra compensation wiring is avoided, the wiring distance is long, the detected voltage precision is difficult to guarantee, the analog signal is transmitted after the voltage is detected, the compensation realization difficulty is large, and the phenomenon of uneven light emission of the display units cannot be effectively improved.
Optionally, the method further comprises: the data voltage circuit, the sensing circuit and the first control switch;
one end of the data voltage circuit is connected with the driving chip, the other end of the data voltage circuit is connected with the control end of the first control switch, and the first end and the second end of the first control switch are arranged on the power circuit of the display unit;
one end of the sensing circuit is connected with the driving chip, and the other end of the sensing circuit is connected with the power circuit;
the data voltage circuit is used for transmitting a driving signal sent by the driving chip according to the first voltage signal to the control end, and the control end controls the first end and the second end to conduct the power supply circuit according to the received driving signal, so that the display unit displays according to the first voltage signal;
the sensing circuit is used for sensing the voltage of the power supply circuit when the display unit displays according to the first voltage signal, and transmitting the sensed voltage to the driving chip, so that the driving chip obtains the second voltage signal.
Optionally, the method further comprises:
the second control switch is arranged on the data voltage circuit and is used for being turned on when the driving chip transmits the driving signal to the data voltage circuit so as to conduct the data voltage circuit, and the data voltage circuit transmits the driving signal to the control end; the second control switch is also used for being closed when the display unit displays according to the driving signal so as to cut off the data voltage circuit;
and the third control switch is arranged on the sensing circuit and is turned on when the display unit displays according to the driving signal so as to conduct the sensing circuit, so that the driving chip detects the display unit through the sensing circuit to obtain the second voltage signal.
Optionally, the method further comprises: the register is respectively connected with the data voltage circuit and the control end;
the register is used for receiving and storing the driving signal transmitted by the data voltage circuit, and transmitting the driving signal to the control end when the second control switch is closed.
Optionally, the driving chip includes: a digital-to-analog conversion circuit;
the digital-to-analog conversion circuit is used for converting the first digital signal into the first voltage signal;
and/or
The digital-to-analog conversion circuit is used for converting the voltage compensation digital signal into a compensation analog signal.
Optionally, the driving chip includes:
an analog-to-digital conversion circuit for converting the difference voltage signal to the difference digital signal.
Optionally, the driving chip includes: and the voltage comparison circuit is used for comparing the first voltage signal with the second voltage signal to obtain the difference voltage signal.
Optionally, the driving chip includes:
and the operational amplification circuit is used for sending out a driving signal according to the first voltage signal.
Based on the same concept, the present invention also provides a display device including the driving compensation circuit as described above, and a plurality of display units.
The driving chip of the driving compensation circuit in the display panel detects the actual voltage of the display unit when the display unit displays according to the first voltage signal to obtain the second voltage signal, obtains the difference voltage signal according to the first voltage signal and the second voltage signal, converts the difference voltage signal into the difference digital signal and sends the difference digital signal to the main control chip so as to enable the main control chip to perform voltage compensation according to the difference digital signal, wherein the digital signal is used between the main control chip and the driving compensation circuit to replace analog quantity transmission, the signal is stable and accurate, the problem that the analog signal is easy to be interfered and inaccurate when being output is solved, meanwhile, the driving compensation circuit detects the voltage of the display unit and transmits the voltage to the main control chip through the digital signal so as to enable the main control chip to perform voltage compensation according to the difference digital signal to achieve the compensation effect, the display unit has the advantages that certain difference in brightness among different display units is eliminated, the display effect is reduced due to the difference, even the phenomenon of uneven light emission is formed, the bad effect of products is caused, extra compensation wiring is avoided, the wiring distance is long, the detected voltage precision is difficult to guarantee, the analog signal is transmitted after the voltage is detected, the compensation realization difficulty is large, and the phenomenon of uneven light emission of the display units cannot be effectively improved.
Based on the same inventive concept, the present application also provides a driving method of a display unit, including: when receiving a first digital signal transmitted by a main control chip, a driving chip converts the first digital signal into a first voltage signal and drives a display unit to display according to the first voltage signal; when the display unit displays according to the first voltage signal, the driving chip detects the display unit to obtain a second voltage signal, and compares the first voltage signal with the second voltage signal to obtain a difference voltage signal; the driving chip converts the difference voltage signal into a difference digital signal and transmits the difference digital signal to the main control chip; and the main control chip receives the difference digital signals and outputs voltage compensation digital signals to each driving chip according to the difference digital signals.
In the driving method of the display unit, the driving chip detects the actual voltage of the display unit to obtain the second voltage signal when the display unit displays according to the first voltage signal, obtains the difference voltage signal according to the first voltage signal and the second voltage signal, converts the difference voltage signal into the difference digital signal and sends the difference digital signal to the main control chip, so that the main control chip performs voltage compensation according to the difference digital signal, wherein the main control chip and the driving chip use digital signals to replace analog quantity transmission, the signals are stable and accurate, the problem that the analog signals are easy to be interfered and inaccurate when being output is solved, meanwhile, the driving chip detects the voltage of the display unit and transmits the voltage to the main control chip through digital signals, so that the main control chip performs voltage compensation according to the difference digital signal to achieve the compensation effect, the effect of eliminating certain difference in brightness among different display units is achieved, the difference can lead to the reduction of the display effect and even the uneven light emitting phenomenon, the product is poor, the additional compensation wiring is avoided, the wiring distance is long, the detected voltage precision is difficult to guarantee, the analog signal is used for transmission after the voltage is detected, the compensation realization difficulty is large, and the uneven light emitting phenomenon of the display units cannot be effectively improved.
Drawings
Fig. 1 is a schematic diagram of basic connections between a driving chip and a display unit and a main control chip according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a basic structure of a driving chip according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a basic structure of a driving chip, a display unit and a main control chip according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a basic structure of a further driving chip, a display unit and a main control chip according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a basic structure of a display device according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a basic structure of another display device according to an embodiment of the present invention;
FIG. 7 is a schematic diagram illustrating a basic flow of a driving method of a display unit according to another alternative embodiment of the present invention;
description of reference numerals:
1-a main control chip, 2-a driving chip, 21-a/d conversion circuit, 22-a/d conversion circuit, 23-a voltage comparison circuit, 24-an operational amplifier circuit, 3-a display unit, 4-a first control switch, 5-a data voltage circuit, 6-a sensing circuit, 7-a second control switch, 8-a third control switch, 9-a capacitor, a positive terminal of a VDD-power circuit, a negative terminal of a VSS-power circuit, and an Emit-display signal circuit.
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, in order to eliminate the brightness difference between different Light Emitting units in the design of the circuits of the Light Emitting units in the display panel, such as an Organic Light-Emitting Diode (OLED) or a Micro LED, a more complicated pixel circuit, such as 7T1C, is generally designed to eliminate the brightness difference caused by the threshold voltage (Vth) shift in a Thin Film Transistor (TFT) to a certain extent. However, because the impedance of the display panel traces causes voltage attenuation, the brightness of different areas will still be different when the same voltage is applied. The traditional external compensation (IC compensation) scheme often needs to add extra compensation wires, and the wire distance is long, the detected voltage precision is difficult to guarantee, and the analog signal is transmitted after the voltage is detected, so that the difficulty in realizing compensation is high, and the phenomenon of uneven light emission of the display unit cannot be effectively improved.
The present application is intended to provide a solution to the above technical problem, the details of which will be explained in the following embodiments.
Examples of the invention
In order to solve the problem that, when a display panel in the related art displays the same image, brightness of different display units 3 may have a certain difference, and the difference may cause a reduction in display effect, even a phenomenon of non-uniform light emission (mura), and cause a product failure, an embodiment of the present invention provides a driving compensation circuit, as shown in fig. 1, a display device includes a plurality of display units 3 (only one is shown in the figure), the driving compensation circuit includes a main control chip 1 and a driving chip 2, wherein the driving chip 2 includes a plurality of (only one is shown in the figure), the driving chip 2 is connected to the main control chip 1, and the driving chip 2 is connected to at least one display unit 3.
When receiving a first digital signal transmitted by the main control chip, each driving chip converts the first digital signal into a first voltage signal and drives the display unit to display according to the first voltage signal; when the display unit displays according to the first voltage signal, each driving chip detects the display unit to obtain a second voltage signal, and the first voltage signal is compared with the second voltage signal to obtain a difference voltage signal; each driving chip converts the difference voltage signal into a difference digital signal and transmits the difference digital signal to the main control chip; and the main control chip receives the difference digital signals and outputs voltage compensation digital signals to each driving chip according to the difference digital signals.
For example, fig. 2, the driving chip 2 in some examples includes: a digital-to-analog conversion circuit 21, an analog-to-digital conversion circuit 22, a voltage comparison circuit 23, and an operational amplification circuit 24; when each driving chip 2 receives a first digital signal transmitted by the main control chip 1, the first digital signal is converted into a first voltage signal through the digital-to-analog conversion circuit 21, and the first voltage signal is output through the operational amplification circuit 24, so that the display unit 3 is controlled to display according to the first voltage signal; when the display unit 3 displays according to the first voltage signal, each driving chip 2 detects the display unit 3 to obtain a second voltage signal, and compares the first voltage signal with the second voltage signal through the voltage comparison circuit 23 to obtain a difference voltage signal; each driving chip 2 converts the difference voltage signal into a difference digital signal through the analog-to-digital conversion circuit 22, and transmits the difference digital signal to the main control chip 1, and the main control chip 1 performs voltage compensation according to the difference digital signal; and then the driving chip 2 receives the voltage compensation digital signal returned by the main control chip 1 according to the difference digital signal, converts the voltage compensation digital signal into a compensation analog signal and transmits the compensation analog signal to the display unit 3 for displaying.
In the driving compensation circuit provided in this embodiment, each driving chip 2 detects the actual voltage of the display unit 3 when the display unit 3 displays according to the first voltage signal to obtain the second voltage signal, obtains the difference voltage signal according to the first voltage signal and the second voltage signal, converts the difference voltage signal into the difference digital signal, and sends the difference digital signal to the main control chip 1, so that the main control chip 1 performs voltage compensation according to the difference digital signal, wherein the main control chip 1 and the driving chip 2 use digital signals to replace analog quantity transmission, the signals are stable and accurate, the problem that the analog signals are easily interfered and inaccurate when being output is solved, and meanwhile, the driving chip 2 detects the voltage of the display unit 3 and transmits the voltage to the main control chip 1 through digital signals, so that the main control chip 1 performs voltage compensation according to the difference digital signal to achieve the compensation effect, the purpose of eliminating the brightness difference between the different display units 3 is achieved, the display effect is reduced due to the difference, even the phenomenon of uneven light emission is formed, the bad effect of the product is caused, extra compensation wiring is avoided, the wiring distance is long, the detected voltage precision is difficult to guarantee, the analog signal is transmitted after the voltage is detected, the compensation realization difficulty is large, and the phenomenon of uneven light emission of the display units 3 cannot be effectively improved.
It should be understood that the types of the display unit 3 include, but are not limited to: one of LED, Micro LED, Mini Light Emitting Diode (Mini-LED), OLED, etc., and the display unit 3 includes but is not limited to: and at least one of a green light display unit, a blue light display unit and a red light display unit.
In some embodiments, the display unit 3 includes:
the display device comprises a red light display unit, a green light display unit and a blue light display unit; or, the display unit 3 includes: the display device comprises a red light display unit, a green light display unit, a blue light display unit and a yellow light display unit. For example, one display unit 3 includes at least one pixel, and each pixel may include at least three color display units, such as RGB three-color display units, that is, one display unit 3 includes a red display unit, a green display unit, and a blue display unit.
It should be understood that the digital-to-analog conversion circuit 21 includes, but is not limited to: the digital-to-analog conversion circuit 21 can convert a digital signal into an analog signal through the digital-to-analog converter, and specifically, the digital-to-analog conversion circuit 21 can convert the first digital signal into the first voltage signal through the digital-to-analog converter; and/or the digital-to-analog conversion circuit 21 is configured to convert the voltage compensation digital signal into the compensation analog signal. It should be understood that the type of digital-to-analog converter is not limited and can be flexibly selected by those skilled in the art.
It should be understood that the analog-to-digital conversion circuit 22 includes, but is not limited to, an analog-to-digital converter, wherein the analog-to-digital conversion circuit 22 can convert an analog signal into a digital signal through the analog-to-digital converter, and in particular, the analog-to-digital conversion circuit 22 can convert a difference voltage signal into a difference digital signal through the analog-to-digital converter. It should be understood that the type of analog-to-digital converter is not limited and can be flexibly selected by those skilled in the art.
In some examples of the present embodiment, as shown in fig. 2, the driving chip 2 includes: a voltage comparison circuit 23; the voltage comparison circuit 23 is configured to compare the first voltage signal with the second voltage signal to obtain the difference voltage signal. The voltage comparison circuit 23 includes, but is not limited to: the voltage comparator, the voltage comparison circuit 23 can compare a plurality of voltage signals by the voltage comparator to obtain a difference voltage signal; specifically, the voltage comparison circuit 23 can compare the first voltage signal with the second voltage signal by a voltage comparator to obtain the difference voltage signal.
Referring again to fig. 2, in some examples, the driving chip 2 further includes: the operational amplifier circuit 24 is configured to drive the display unit 3 to display according to the first voltage signal by the operational amplifier circuit 24. The operational amplifier circuit 24 includes, but is not limited to: specifically, the operational amplifier 24 can output a voltage according to the first voltage signal through the operational amplifier, and then drive the display unit 3 to display according to the output voltage.
It should be understood that the type of the voltage comparator and the operational amplifier are not limited and can be flexibly selected by those skilled in the art.
It should be understood that in some examples, the driver chip 2 also includes, but is not limited to: the detection circuit is used for being connected with the outside and detecting the actual voltage of the display unit 3; the transmission circuit is used for being connected with the outside to transmit signals and transmitting the signals to the display unit 3, and the receiving circuit is connected with the outside and used for receiving the signals transmitted by the main control chip 1.
It will be appreciated that the display unit 3 is also connected to the display signal circuit Emit for receiving the display signal.
In some examples of this embodiment, the drive compensation circuit further includes: a first control switch 4, a first end and a second end of the first control switch 4 being disposed on a power supply circuit of the display unit 3; one end of the data voltage circuit 5 is connected to the driving chip 2, the other end of the data voltage circuit 5 is connected to the control end of the first control switch 4, the data voltage circuit 5 is configured to transmit a driving signal sent by the driving chip 2 according to a first voltage signal to the control end of the first control switch 4, that is, the first control switch 4 is turned on according to a signal transmitted by the driving chip 2, so that the display unit 3 is turned on with the power circuit of the display unit 3, and the driving chip 2 drives the display unit 3 to display according to the first voltage signal, for example, as shown in fig. 3, the first control switch is disposed at a negative electrode terminal VSS of the power circuit of the display unit 3. Specifically, after the driving chip 2 sends out a voltage according to the first voltage signal through the operational amplifier circuit 24, the data voltage circuit 5 transmits the voltage to the control end of the first control switch 4, so that the first end and the second end of the first control switch 4 are connected, the power circuit of the display unit 3 is further connected, and the display is performed when the power circuit of the display unit 3 is connected. The first control switch 4 may be a Field Effect Transistor (MOSFET), such as a P-type fet or an N-type fet; for example, in some examples, when the fet is a P-type fet, a source of the P-type fet is a first terminal, the source is connected to the display unit 3, a drain of the P-type fet is a second terminal, and a drain of the P-type fet is connected to a ground of a power circuit of the display unit 3, and when the driving chip 2 outputs a low level through the data voltage circuit 5 according to the first voltage signal, the P-type fet is turned on, and then the power circuit of the display unit 3 is turned on, so as to perform display. When the field effect transistor is an N-type field effect transistor, the principle is similar, and a person skilled in the art can set the N-type field effect transistor according to the setting mode of the P-type field effect transistor, which is not described herein again.
It should be understood that, in some examples, the first control switch 4 is disposed at the positive terminal VDD of the power circuit connecting the display unit 3 and the display unit 3, and the data voltage circuit 5 is also capable of turning on the first control switch 4 according to the signal transmitted by the driving chip 2, so as to turn on the power circuit connecting the display unit 3 and the display unit 3, and further enable the driving chip 2 to drive the display unit 3 to display according to the first voltage signal.
In some examples of this embodiment, as shown in fig. 3, the drive compensation circuit further includes: the sensing circuit 6 is connected with the power circuit of the display unit 3, and the sensing circuit 6 is configured to detect the voltage of the power circuit when the display unit 3 displays according to the first voltage signal, and transmit the detected voltage to the driving chip 2, so that the driving chip 2 obtains the second voltage signal, that is, the driving chip 2 detects the power circuit of the display unit 3 through the sensing circuit 6 to obtain the second voltage signal, and further obtain the current actual voltage value of the display unit 3. Wherein the driving chip 2 detects the actual voltage of the power circuit of the display unit 3 as the second voltage signal of the display unit 3 through the sensing circuit 6, it should be understood that, as shown in fig. 3, the sensing circuit 6 may be connected to the negative terminal VSS of the power circuit of the display unit 3; the positive terminal VDD of the power supply circuit of the display unit 3 may be connected thereto.
The power supply voltage of the display unit 3 may also be provided with a separate power supply device, and the power supply circuit of the display unit 3 is connected with an external power supply device, as shown in fig. 3. It should be understood that the power supply voltage of the display unit 3 may be provided by the driving chip 2, and the power supply circuit of the display unit 3 is connected to the driving chip 2, as shown in fig. 4.
In some examples of this embodiment, as shown in fig. 3 or 4, a second control switch 7 is disposed on the sensing circuit 6, the second control switch 7 is disposed on the data voltage circuit, and the second control switch 7 is turned on when the driving chip 2 transmits the driving signal to the data voltage circuit to turn on the data voltage circuit, so that the data voltage circuit transmits the driving signal to the control terminal; the second control switch is also used for being closed when the display unit displays according to the driving signal so as to cut off the data voltage circuit.
It should be understood that, in some examples, a charging capacitor 9 is further disposed on the data voltage circuit 5, as shown in fig. 3 or 4, the charging capacitor 9 is used for storing the voltage sent by the driving chip 2, and further, when the second control switch 7 is turned off, the stored voltage can be output to the first control switch 4 to turn on the first control switch 4.
In some examples of the present embodiment, as shown in fig. 3 or 4, a third control switch 8 is disposed on the sensing circuit 6, the third control switch 8 is turned on when the driving chip 2 detects the display unit 3, and the third control switch 8 is turned off when the driving chip 2 transmits a voltage for driving the display unit 3.
For better understanding of the present invention, the present embodiment provides a more specific example to illustrate the present invention, and the present embodiment provides a driving compensation circuit, in the present example, the driving compensation circuit is applied to a display panel, as shown in fig. 5, which includes but is not limited to: the display device comprises a main control chip 1(TCON) and a plurality of driving chips 2(Driver ICs), wherein the driving chips 2 are transferred to a display area of a display panel (connected with corresponding display units 3 on the display panel) in a piece-making or giant-rotating mode, and each driving chip 2 is connected with at least one display unit 3; the drive compensation circuit further includes: a first control switch 4, illustratively, the first control switch 4 is a field effect transistor, a first end and a second end of the first control switch 4 are a source and a drain of the field effect transistor, respectively, and the source and the drain are provided with a ground power circuit for connecting the display unit 3 and the display unit 3; and a data voltage circuit 5, wherein one end of the data voltage circuit 5 is connected to the driving chip 2, the other end of the data voltage circuit 5 is connected to a gate (i.e., a control terminal in this example) of the field effect transistor, and the data voltage circuit 5 is configured to turn on the field effect transistor according to a signal transmitted by the driving chip 2, so as to turn on a power circuit of the display unit 3. A sensing circuit 6, wherein the sensing circuit 6 is connected with the driving chip 2 and a grounding power circuit of the display unit 3; the driving chip 2 detects the display unit 3 through the sensing circuit 6 to obtain the second voltage signal. The data voltage circuit 5 is provided with a second control switch 7, and the sensing circuit 6 is provided with a third control switch 8.
It should be understood that the driving chip 2 includes, but is not limited to: a digital-to-analog conversion circuit 21, an analog-to-digital conversion circuit 22, a voltage comparison circuit 23, and an operational amplification circuit 24; when the display unit 3 is required to display, the main control chip 1 sends a first digital signal corresponding to a first frame to the driving chip 2, the driving chip 2 receives the first digital signal, converts the first digital signal into a first voltage signal V0 (analog signal) through the digital-to-analog conversion circuit 21, amplifies the first voltage signal by the operational amplification circuit 24, and outputs the first voltage signal to the display unit 3, at this time, the second control switch 7 is turned on, and the third control switch 8 is turned off. Before the second frame starts, that is, when the display unit 3 displays according to the first voltage signal, S1 is turned off, S2 is turned on, the sensing circuit 6 is wired, the driving chip 2 detects the actual voltage of the display unit 3, and the detected voltage is used as the second voltage signal V1. The driving chip 2 compares the detected V1 with the voltage comparison circuit 23 and V0 to obtain a difference voltage signal Δ V, and converts the difference voltage signal Δ V into a difference digital signal through the analog-to-digital conversion circuit 22.
In some examples of this embodiment, in the above example, each driving chip 2 in the display area transmits the differential digital signal to the main control chip 1 through the sense wire, and the main control chip 1 receives the compensated differential digital signal, converts the compensated differential digital signal into a compensated voltage compensation digital signal, and outputs the compensated voltage compensation digital signal to the driving chip 2. The driving chip 2 outputs a voltage V0' through the digital-to-analog conversion circuit 21. The driving chip 2 detects the compensated voltage value V1 ' again, and compares the compensated voltage value V1 ' with V0 ', so that the difference between the two values is within the error range, and the compensation is considered to be completed. After the compensation is completed, the compensation value is stored in the flash memory of the main control chip 1, and compensation is not needed.
In the driving compensation circuit provided in this embodiment, each driving chip 2 detects the voltage of the display unit 3 when driving the display unit 3. After the display device is powered on, the driving chip 2 in the driving compensation circuit starts to detect the voltage of each display unit 3 of the current display line through the sensing circuit 6. The measured voltage is converted into a digital signal and fed back to the main control chip 1 to be compared with the standard output voltage, a differential voltage signal needing to be compensated is obtained, the differential voltage signal is converted into a differential numerical signal and transmitted to the main control chip 1, so that the main control chip 1 performs voltage compensation according to the differential digital signal to achieve the compensation effect, the effect of eliminating certain difference of brightness among different display units 3 is achieved, the display effect is reduced due to the difference, even the phenomenon of uneven light emission is formed, the product is poor, the additional compensation wiring is avoided, the wiring distance is long, the detected voltage precision is difficult to guarantee, the voltage is transmitted by an analog signal after the voltage is detected, the compensation realization difficulty is high, and the phenomenon of uneven light emission of the display units 3 cannot be effectively improved.
Based on the same concept, the present invention also provides a display device, as shown in fig. 6, which includes the driving compensation circuit of the above example, that is, includes a main control chip 1, a driving chip 2, and a plurality of display units 3; the main control chip 1 transmits a first digital signal to the driving chip 2; the control chip of the display unit 3 converts the received first digital signal into a first voltage signal, and drives the display unit 3 to display according to the first voltage signal; when the display unit 3 displays according to the control signal, the driving chip 2 detects the display unit 3 to obtain a second voltage signal, and compares the first voltage signal with the second voltage signal to obtain a difference voltage signal; the driving chip 2 converts the difference voltage signal into a difference digital signal and transmits the difference digital signal to the main control chip 1; and the main control chip 1 performs voltage compensation according to the difference digital signal. The display device of the present embodiment includes, but is not limited to, a display panel or the like capable of displaying.
In the display device, through the driving chip 2, when the display unit 3 displays according to the first voltage signal converted from the first digital signal sent by the main control chip 1, the actual voltage of the display unit 3 is detected to obtain the second voltage signal, and the difference voltage signal is obtained according to the first voltage signal and the second voltage signal, and then the difference voltage signal is converted into the difference digital signal and sent to the main control chip 1, so that the main control chip 1 performs voltage compensation according to the difference digital signal, wherein the digital signal is used between the main control chip 1 and the driving chip 2 to replace the analog signal transmission, the signal is stable and accurate, the problem that the analog signal is easily interfered inaccurately when being output is solved, and meanwhile, the driving chip 2 detects the voltage of the display unit 3 and transmits the voltage to the main control chip 1 through the digital signal, so that the main control chip 1 performs voltage compensation according to the difference digital signal to achieve the effect of compensation, and achieves the effect of eliminating certain difference in brightness among different display units 3, the difference can cause the display effect to be reduced, even the phenomenon of uneven light emission is formed, the product is poor, the addition of extra compensation wiring is avoided, the wiring distance is long, the detected voltage precision is difficult to guarantee, the analog signal is transmitted after the voltage is detected, the compensation realization difficulty is large, and the phenomenon of uneven light emission of the display units 3 cannot be effectively improved.
Alternative embodiment of the invention
An embodiment of the present invention provides a driving method of a display unit, as shown in fig. 7, which includes but is not limited to:
s101, when receiving a first digital signal transmitted by the main control chip, the driving chip converts the first digital signal into a first voltage signal and drives the display unit to display according to the first voltage signal;
s102, when the display unit displays according to the first voltage signal, the driving chip detects the display unit to obtain a second voltage signal, and compares the first voltage signal with the second voltage signal to obtain a difference voltage signal;
s103, the driving chip converts the difference voltage signal into a difference digital signal and transmits the difference digital signal to the main control chip;
and S104, the main control chip receives the difference digital signals and outputs voltage compensation digital signals to each driving chip according to the difference digital signals.
Wherein the display panel includes, but is not limited to: the display device comprises a main control chip 1 and a plurality of driving chips 2, wherein the driving chips 2 are transferred to a display area (namely corresponding display units 3) of a display panel in a manner of punching or giant rotation, and the driving chips 2 are connected with at least one display unit 3; the display panel further includes: a first control switch 4, wherein a first end and a second end of the first control switch 4 are provided with a grounding power supply circuit for connecting the display unit 3 and the display unit 3; and one end of the data voltage circuit 5 is connected with the driving chip 2, the other end of the data voltage circuit 5 is connected with the control end of the first control switch 4, and the data voltage circuit 5 is used for switching on the first control switch 4 according to a signal transmitted by the driving chip 2 so as to switch on the power supply circuit of the display unit 3. A sensing circuit 6, wherein the sensing circuit 6 is connected with the driving chip 2 and a grounding power circuit of the display unit 3; the driving chip 2 detects the display unit 3 through the sensing circuit 6 to obtain the second voltage signal. The data voltage circuit 5 is provided with a second control switch 7, and the sensing circuit 6 is provided with a third control switch 8.
It should be understood that the driving chip 2 includes, but is not limited to: a digital-to-analog conversion circuit 21, an analog-to-digital conversion circuit 22, a voltage comparison circuit 23, and an operational amplification circuit 24; when the display unit 3 is required to display, the main control chip 1 sends a first digital signal corresponding to a first frame to the driving chip 2, the driving chip 2 receives the first digital signal, converts the first digital signal into a first voltage signal V0 (analog signal) through the digital-to-analog conversion circuit 21, and outputs the first voltage signal V0 (analog signal) to the display unit 3 through the operational amplification circuit 24, at this time, the second control switch 7 is turned on, and the third control switch 8 is turned off. Before the second frame starts, that is, when the display unit 3 displays according to the first voltage signal, S1 is turned off, S2 is turned on, the sensing circuit 6 is wired, the driving chip 2 detects the actual voltage of the display unit 3, and the detected voltage is used as the second voltage signal V1. The driving chip 2 compares the detected V1 with the V0 through the voltage comparison circuit 23 to obtain a difference voltage signal Δ V, and converts the difference voltage signal Δ V into a difference digital signal through the analog-to-digital conversion circuit 22.
In some examples of this embodiment, in the above example, each driving chip 2 in the display area transmits the differential digital signal to the main control chip 1 through the sense wire, and the main control chip 1 receives the compensated differential digital signal, converts the compensated differential digital signal into a compensated voltage compensation digital signal, and outputs the compensated voltage compensation digital signal to the driving chip 2. The driving chip 2 outputs a voltage V0' through the digital-to-analog conversion circuit 21. The driving chip 2 detects the compensated voltage value V1 ' again, and compares the compensated voltage value V1 ' with V0 ', so that the difference between the two values is within the error range, and the compensation is considered to be completed. After the compensation is completed, the compensation value is stored in the flash memory of the main control chip 1, and compensation is not needed.
It should be understood that the combination and transformation of the steps in the driving method of the display unit provided in this embodiment can achieve the functions implemented by the modules in the display panel in the above embodiments.
In the driving method of the display unit provided in this embodiment, when the driving compensation circuit drives the display unit, the driving chip detects the voltage of the display unit at the same time. After the display device is powered on, the driving chip starts to detect the voltage of each display unit of the current display line through the sensing circuit. The measured voltage is converted into a digital signal and fed back to the main control chip to be compared with the standard output voltage, a differential voltage signal needing to be compensated is obtained, the differential voltage signal is converted into a differential numerical signal and transmitted to the main control chip, so that the main control chip performs voltage compensation according to the differential digital signal to achieve the compensation effect, the effect of eliminating certain difference of brightness among different display units is achieved, the display effect is reduced due to the difference, even the phenomenon of uneven light emission is formed, the product is poor, extra compensation wiring is avoided, the wiring distance is long, the detected voltage precision is difficult to guarantee, the voltage is transmitted by analog signals after being detected, the compensation realization difficulty is large, and the phenomenon of uneven light emission of the display units cannot be effectively improved.
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 driving compensation circuit applied to a display device including a plurality of display units, the driving compensation circuit comprising:
each driving chip is connected with at least one display unit;
the main control chip is connected with the plurality of driving chips;
when receiving a first digital signal transmitted by the main control chip, each driving chip converts the first digital signal into a first voltage signal and drives the display unit to display according to the first voltage signal;
when the display unit displays according to the first voltage signal, each driving chip detects the display unit to obtain a second voltage signal, and the first voltage signal is compared with the second voltage signal to obtain a difference voltage signal;
each driving chip converts the difference voltage signal into a difference digital signal and transmits the difference digital signal to the main control chip;
and the main control chip receives the difference digital signals and outputs voltage compensation digital signals to each driving chip according to the difference digital signals.
2. The drive compensation circuit of claim 1, further comprising: the data voltage circuit, the sensing circuit and the first control switch;
one end of the data voltage circuit is connected with the driving chip, the other end of the data voltage circuit is connected with the control end of the first control switch, and the first end and the second end of the first control switch are arranged on the power circuit of the display unit;
one end of the sensing circuit is connected with the driving chip, and the other end of the sensing circuit is connected with the power circuit;
the data voltage circuit is used for transmitting a driving signal sent by the driving chip according to the first voltage signal to the control end, and the control end controls the first end and the second end to conduct the power supply circuit according to the received driving signal, so that the display unit displays according to the first voltage signal;
the sensing circuit is used for sensing the voltage of the power supply circuit when the display unit displays according to the first voltage signal, and transmitting the sensed voltage to the driving chip, so that the driving chip obtains the second voltage signal.
3. The drive compensation circuit of claim 2, further comprising:
the second control switch is arranged on the data voltage circuit and is used for being turned on when the driving chip transmits the driving signal to the data voltage circuit so as to conduct the data voltage circuit, and the data voltage circuit transmits the driving signal to the control end; the second control switch is also used for being closed when the display unit displays according to the driving signal so as to cut off the data voltage circuit;
and the third control switch is arranged on the sensing circuit and is turned on when the display unit displays according to the driving signal so as to conduct the sensing circuit, so that the driving chip detects the display unit through the sensing circuit to obtain the second voltage signal.
4. The drive compensation circuit of claim 3, further comprising: the register is respectively connected with the data voltage circuit and the control end;
the register is used for receiving and storing the driving signal transmitted by the data voltage circuit, and transmitting the driving signal to the control end when the second control switch is closed.
5. The drive compensation circuit of any one of claims 1-4, wherein the driver chip comprises: a digital-to-analog conversion circuit;
the digital-to-analog conversion circuit is used for converting the first digital signal into the first voltage signal;
and/or
The digital-to-analog conversion circuit is used for converting the voltage compensation digital signal into a compensation analog signal.
6. The drive compensation circuit of any one of claims 1-4, wherein the driver chip comprises:
an analog-to-digital conversion circuit for converting the difference voltage signal to the difference digital signal.
7. The drive compensation circuit of any one of claims 1-4, wherein the driver chip comprises:
and the voltage comparison circuit is used for comparing the first voltage signal with the second voltage signal to obtain the difference voltage signal.
8. The drive compensation circuit of any one of claims 1-4, wherein the driver chip comprises:
and the operational amplification circuit is used for sending out a driving signal according to the first voltage signal.
9. A display device comprising the drive compensation circuit according to any one of claims 1 to 8, and a plurality of display cells.
10. A method of driving a display unit, comprising:
when receiving a first digital signal transmitted by a main control chip, a driving chip converts the first digital signal into a first voltage signal and drives a display unit to display according to the first voltage signal;
when the display unit displays according to the first voltage signal, the driving chip detects the display unit to obtain a second voltage signal, and compares the first voltage signal with the second voltage signal to obtain a difference voltage signal;
the driving chip converts the difference voltage signal into a difference digital signal and transmits the difference digital signal to the main control chip;
and the main control chip receives the difference digital signals and outputs voltage compensation digital signals to each driving chip according to the difference digital signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110949075.4A CN114038397A (en) | 2021-08-18 | 2021-08-18 | Drive compensation circuit, display device, and method for driving display unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110949075.4A CN114038397A (en) | 2021-08-18 | 2021-08-18 | Drive compensation circuit, display device, and method for driving display unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114038397A true CN114038397A (en) | 2022-02-11 |
Family
ID=80139787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110949075.4A Pending CN114038397A (en) | 2021-08-18 | 2021-08-18 | Drive compensation circuit, display device, and method for driving display unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114038397A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115331613A (en) * | 2022-08-15 | 2022-11-11 | 惠科股份有限公司 | Driving circuit, driving method and display device |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976546A (en) * | 2010-10-19 | 2011-02-16 | 友达光电股份有限公司 | Pixel circuits with power voltage drop compensation functions and luminous panel |
| CN102460549A (en) * | 2009-06-09 | 2012-05-16 | 全球Oled科技有限责任公司 | Display device with parallel data distribution |
| CN103366676A (en) * | 2012-03-27 | 2013-10-23 | 乐金显示有限公司 | Organic light-emitting display device |
| CN104021755A (en) * | 2014-05-22 | 2014-09-03 | 京东方科技集团股份有限公司 | Pixel circuit, driving method and display device |
| CN105206212A (en) * | 2015-08-27 | 2015-12-30 | 京东方科技集团股份有限公司 | Display panel and display apparatus |
| CN108269537A (en) * | 2016-12-30 | 2018-07-10 | 乐金显示有限公司 | Organic light-emitting diode (OLED) display apparatus |
| CN110047437A (en) * | 2019-05-16 | 2019-07-23 | 昆山国显光电有限公司 | A kind of driving method of pixel circuit, display panel and display panel |
| CN110827763A (en) * | 2019-11-07 | 2020-02-21 | 深圳市华星光电半导体显示技术有限公司 | Pixel circuit, driving method thereof and display device |
| CN112558352A (en) * | 2020-12-04 | 2021-03-26 | Tcl华星光电技术有限公司 | Display device and driving method thereof |
| CN112823386A (en) * | 2019-08-30 | 2021-05-18 | 京东方科技集团股份有限公司 | Display substrate and display panel |
| CN112820239A (en) * | 2019-10-30 | 2021-05-18 | 三星显示有限公司 | Display device and driving method of display device |
| CN213519209U (en) * | 2020-10-29 | 2021-06-22 | 重庆康佳光电技术研究院有限公司 | Display device |
-
2021
- 2021-08-18 CN CN202110949075.4A patent/CN114038397A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102460549A (en) * | 2009-06-09 | 2012-05-16 | 全球Oled科技有限责任公司 | Display device with parallel data distribution |
| CN101976546A (en) * | 2010-10-19 | 2011-02-16 | 友达光电股份有限公司 | Pixel circuits with power voltage drop compensation functions and luminous panel |
| CN103366676A (en) * | 2012-03-27 | 2013-10-23 | 乐金显示有限公司 | Organic light-emitting display device |
| CN104021755A (en) * | 2014-05-22 | 2014-09-03 | 京东方科技集团股份有限公司 | Pixel circuit, driving method and display device |
| CN105206212A (en) * | 2015-08-27 | 2015-12-30 | 京东方科技集团股份有限公司 | Display panel and display apparatus |
| CN108269537A (en) * | 2016-12-30 | 2018-07-10 | 乐金显示有限公司 | Organic light-emitting diode (OLED) display apparatus |
| CN110047437A (en) * | 2019-05-16 | 2019-07-23 | 昆山国显光电有限公司 | A kind of driving method of pixel circuit, display panel and display panel |
| CN112823386A (en) * | 2019-08-30 | 2021-05-18 | 京东方科技集团股份有限公司 | Display substrate and display panel |
| CN112820239A (en) * | 2019-10-30 | 2021-05-18 | 三星显示有限公司 | Display device and driving method of display device |
| CN110827763A (en) * | 2019-11-07 | 2020-02-21 | 深圳市华星光电半导体显示技术有限公司 | Pixel circuit, driving method thereof and display device |
| CN213519209U (en) * | 2020-10-29 | 2021-06-22 | 重庆康佳光电技术研究院有限公司 | Display device |
| CN112558352A (en) * | 2020-12-04 | 2021-03-26 | Tcl华星光电技术有限公司 | Display device and driving method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115331613A (en) * | 2022-08-15 | 2022-11-11 | 惠科股份有限公司 | Driving circuit, driving method and display device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11263937B2 (en) | Pixel circuit, method of driving the same, aging detection method and display panel | |
| US10867556B2 (en) | Pixel unit circuit, method for driving the same, and pixel circuit | |
| US8952874B2 (en) | Organic light emitting display and driving method thereof | |
| CN102203845B (en) | Display device and its driving method | |
| CN106910463B (en) | AMOLED drive circuit and display device | |
| WO2017197702A1 (en) | Threshold voltage detection circuit of oled display apparatus | |
| US20210233477A1 (en) | Display driving circuit, method of driving display driving circuit, display panel, and display device | |
| US10565937B2 (en) | Pixel sensing apparatus and panel driving apparatus | |
| US11404018B2 (en) | Display device preventing dimming in display during long-term use | |
| US20200168140A1 (en) | Display panel | |
| US12014666B2 (en) | Pixel driving circuit and display panel | |
| US20190035330A1 (en) | Pixel compensation circuit | |
| CN112530368B (en) | Pixel circuit, display panel and display device | |
| US11295694B2 (en) | Display device | |
| US20180233080A1 (en) | Amoled pixel driving circuit and amoled pixel driving method | |
| CN112785961A (en) | Pixel driving circuit and display panel | |
| CN114038397A (en) | Drive compensation circuit, display device, and method for driving display unit | |
| CN112967665B (en) | Light emitting element control circuit, display panel and display device | |
| CN110706641A (en) | Pixel driving circuit and display device | |
| CN110972503A (en) | Pixel circuit, driving method thereof, display panel and display device | |
| KR20170080330A (en) | Organic light emitting diode display and driving circuit thereof | |
| CN203134328U (en) | Pixel circuit and display device thereof | |
| CN112885302A (en) | Pixel circuit, driving method thereof, display substrate and display device | |
| US11783760B2 (en) | Pixel circuit and display panel | |
| CN109754748B (en) | Display panel's drive circuit, display panel and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220211 |