CN116434704A - Pixel compensation method, circuit and display panel - Google Patents

Pixel compensation method, circuit and display panel Download PDF

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CN116434704A
CN116434704A CN202310480262.1A CN202310480262A CN116434704A CN 116434704 A CN116434704 A CN 116434704A CN 202310480262 A CN202310480262 A CN 202310480262A CN 116434704 A CN116434704 A CN 116434704A
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pixel
compensation
pixels
parameters
luminous
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CN116434704B (en
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邱彬
叶利丹
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HKC Co Ltd
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HKC Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • 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
    • G09G3/2003—Display of colours
    • 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
    • G09G3/2007—Display of intermediate tones
    • G09G3/2074—Display of intermediate tones using sub-pixels
    • 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
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours
    • 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
    • G09G2320/029—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
    • G09G2320/0295—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel by monitoring each display pixel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

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  • Electroluminescent Light Sources (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The application relates to a pixel compensation method, a circuit and a display panel, wherein the scheme obtains the luminous parameters of pixels through at least two different pixel detection modules, wherein the different pixel detection modules detect different kinds of luminous parameters; respectively determining compensation parameters corresponding to each luminous parameter, and carrying out luminous compensation on the pixels according to at least two determined compensation parameters; after at least two kinds of luminous parameters are obtained, the compensation parameters corresponding to each luminous parameter are respectively determined, then the pixels are respectively compensated according to the determined compensation parameters, and in the process of driving the pixels to emit light, the pixels are subjected to luminous compensation at least twice through different compensation parameters, so that the precision and the accuracy of luminous compensation are improved, the luminous compensation is more reliable and accurate, and the display effect of the pixels is further improved.

Description

Pixel compensation method, circuit and display panel
Technical Field
The present disclosure relates to the field of display panels, and particularly to a pixel compensation method and circuit and a display panel.
Background
With the development of related technologies, display technologies have evolved from liquid crystal displays (Liquid Crysta lDisplay, LCD) to organic light emitting diodes (Organic light emitting diode, OLED), which have advantages of high contrast ratio, self-luminescence, fast response, wide viewing angle, high brightness, bright color, thinness, availability for flexible panels, wide application temperature range, no need for backlight sources, simpler construction and manufacturing process, etc., compared to LCDs.
The OLED causes characteristic drift due to the process, design, materials, etc., so that the target light intensity of the OLED cannot reach our set value, resulting in a decrease in display taste. At present, a sensing circuit is arranged in the related art, the driving current passing through the OLED or the TFT is sensed through the sensing circuit, the brightness of the OLED is further reversely pushed, and the feedback signal is obtained according to an algorithm to compensate, but the scheme has the defect that the current of the OLED is sensed instead of the brightness of the OLED, so that the OLED cannot be accurately compensated.
Disclosure of Invention
The application provides a pixel compensation method, a circuit and a display panel, which are used for solving the problem that in the related technology, pixels cannot be accurately compensated, so that the display effect is poor.
In a first aspect, the present application provides a pixel compensation method, including: in the process of driving a pixel to emit light, obtaining the light emitting parameters of the pixel through at least two different pixel detection modules, wherein the different pixel detection modules detect different kinds of light emitting parameters; and respectively determining compensation parameters corresponding to each luminous parameter, and carrying out luminous compensation on the pixels according to the determined at least two compensation parameters.
Optionally, the at least two different pixel detection modules include: a brightness detection module and a temperature detection module; obtaining, by at least two different pixel detection modules, a light emission parameter of the pixel, comprising: acquiring the brightness of the pixel when the pixel emits light through the brightness detection module; and acquiring the temperature of the pixel during light emission through the temperature detection module.
Optionally, determining a compensation parameter corresponding to each light emitting parameter, and performing light emitting compensation on the pixel according to the determined at least two compensation parameters, including: determining a first compensation parameter according to the brightness of the pixel, and determining a second compensation parameter according to the temperature of the pixel; and respectively carrying out luminescence compensation on the pixels according to the first compensation parameter and the second compensation parameter.
Optionally, the at least two different pixel detection modules further include: a voltage detection module; acquiring the light emitting parameters of the pixels by at least two different pixel detection modules further comprises: acquiring the conduction voltage drop of the pixel during light emission through the voltage detection module; before performing light emission compensation on the pixel according to the first compensation parameter and the second compensation parameter, the method further includes: if the conduction voltage drop is not matched with the target conduction voltage drop, determining the aging degree of the pixel according to the conduction voltage drop; and determining the luminous efficiency and the power consumption of the pixel according to the aging degree, wherein the luminous efficiency is used for determining the first compensation parameter in cooperation with the brightness of the pixel, and the power consumption is used for determining the second compensation parameter in cooperation with the temperature of the pixel.
Optionally, performing luminescence compensation on the pixel according to the determined at least two compensation parameters, including: compensating data signals corresponding to the pixels according to the determined at least two compensation parameters, wherein the data signals are used for controlling the conduction degree of the driving switches corresponding to the pixels; and/or compensating the constant current source corresponding to the pixel according to the determined at least two compensation parameters.
Optionally, before acquiring the light emitting parameters of the pixels by at least two pixel detection modules, the method further comprises: detecting the temperature of the environment outside the pixel through an environment temperature detection module; determining a pre-compensation scheme corresponding to the pixels with different colors according to the temperature of the external environment of the pixels; the pixels are precompensated based on the precompensation scheme.
In a second aspect, the present application provides a pixel compensation circuit, the pixel compensation circuit comprising: the system comprises a control module and at least two pixel detection modules, wherein each pixel detection module is connected with the control module; the pixel detection module is used for acquiring the luminous parameters of the pixels in the process of driving the pixels to emit light, wherein different pixel detection modules detect different kinds of luminous parameters; the control module is used for respectively determining compensation parameters corresponding to each luminous parameter and carrying out luminous compensation on the pixels according to the determined at least two compensation parameters.
Optionally, the pixel compensation circuit further includes: the voltage detection module is used for acquiring the conduction voltage drop of the pixel when the pixel emits light; the control module is also used for determining the aging degree of the pixel according to the conduction voltage drop and determining the luminous efficiency and the power consumption of the pixel according to the aging degree.
Optionally, the pixel compensation circuit further includes: the external environment temperature detection module is used for detecting the temperature of the external environment of the pixel; the control module is also used for determining a precompensation scheme corresponding to the pixels with different colors according to the temperature of the environment outside the pixels, and precompensating the pixels based on the precompensation scheme.
In a third aspect, there is provided a display panel including: a plurality of pixels arranged in an array, each pixel being connected to a corresponding driving circuit, and at least some of the pixels being provided with a pixel compensation circuit as described in any one of the above.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:
according to the scheme provided by the embodiment of the application, the luminous parameters of the pixels are obtained through at least two different pixel detection modules, wherein the different pixel detection modules detect different kinds of luminous parameters; respectively determining compensation parameters corresponding to each luminous parameter, and carrying out luminous compensation on the pixels according to at least two determined compensation parameters; after obtaining at least two kinds of luminous parameters, respectively determining the compensation parameters corresponding to each luminous parameter, then respectively compensating the pixels according to the determined compensation parameters, and carrying out luminous compensation on the pixels at least twice through different compensation parameters in the process of driving the pixels to emit light, thereby improving the precision and accuracy of luminous compensation, ensuring the luminous compensation to be more reliable and accurate, further improving the display effect of the pixels, and avoiding the problems that in the related art, the pixels are subjected to luminous compensation through one-time luminous compensation, the compensation deviation exists, the pixels cannot be accurately compensated, and the display effect is poor.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a basic flow chart of a pixel compensation method according to a first embodiment of the present application;
fig. 2 is a basic schematic diagram of a pixel driving circuit according to a first embodiment of the present disclosure;
FIG. 3 is a basic schematic diagram of an ambient temperature and a relative luminous intensity of a pixel according to an embodiment of the present disclosure;
fig. 4 is a basic schematic diagram of a pixel compensation circuit according to a second embodiment of the present disclosure;
fig. 5 is a basic schematic diagram of a pixel compensation circuit according to a third embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a display panel according to a fourth embodiment of the present disclosure;
reference numerals illustrate:
1-a control switch; 2-driving a switch; 3-a memory module; 4-pixels; 5-a control module; 6-a temperature detection module; 7-a voltage detection module; 7-a brightness detection module; 9-an ambient temperature detection module; 10-a driving circuit; VDD-constant current source; sn-scan signals; dm-data signals; m1-a first thin film transistor; m2-a second thin film transistor; c1-a storage capacitor; r1-photoresistor; r2-fixed resistance; RT 1-a first thermistor; r3-a second fixed resistor; RT 2-a second thermistor; r4-a third fixed resistor; sense 1-brightness signal; sense 2-temperature signal; sense 3-external ambient temperature signal; sense 4-turn on voltage drop signal.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.
Example 1
In order to solve the problem of poor display effect caused by the fact that the pixel cannot be accurately compensated in the related art, refer to fig. 1, fig. 1 is a pixel compensation method provided in an embodiment of the present application, where the pixel compensation method includes:
s101, acquiring luminous parameters of pixels through at least two pixel detection modules in the process of driving the pixels to emit light, wherein different pixel detection modules detect different kinds of luminous parameters;
s102, respectively determining compensation parameters corresponding to each luminous parameter, and carrying out luminous compensation on the pixels according to the determined at least two compensation parameters.
It can be understood that, the pixel 4 is driven to emit light by the pixel 4 driving circuit, as shown in fig. 2, fig. 2 shows an exemplary pixel driving circuit, which includes a control switch 1, a driving switch 2, and a storage module 3, where an output end of the driving switch 2 is connected to an anode of the pixel 4, an input end of the driving switch 2 is connected to a constant current source VDD, a control end of the control switch 1 is connected to a scan signal Sn, an input end of the control switch 1 is connected to a data signal Dm, an output end of the control switch 1 is connected to a control end of the driving switch 2, one end of the storage module 3 is connected between an output end of the control switch 1 and a control end of the driving switch 2, and the other end of the storage module 3 is connected to the constant current source VDD;
In the above example, the working principle of the driving circuit of the pixel 4 is that the line scanning circuit is turned on at time t1, the control switch 1 is turned on, meanwhile, the data signal Dm is input, the data signal Dm is transmitted to the driving switch 2 through the control switch 1, the driving switch 2 is turned on, so that the constant current source VDD outputs current to the pixel 4 through the driving switch 2, and the pixel 4 emits light; meanwhile, the control switch 1 writes the data signal Dm into the memory module 3, the scanning signal Sn is turned off at time t2, the control switch 1 is turned off, the memory switch outputs the stored data signal Dm to keep the driving switch 2 on, the constant current source VDD continuously supplies current to the pixel 4, and the pixel 4 continuously emits light in time t 2.
Wherein the current flowing through the pixel 4 is controlled by the driving switch 2, which satisfies the following formula:
Figure BDA0004207094420000031
wherein W and L are the width and length of the channel of the driving switch 2, mu is the effective carrier mobility, cox is the capacitance per unit area of the gate oxide layer, and Vth is the threshold voltage of the driving switch 2.
Taking the above example as the example, when the driving switch 2 is turned on, the pixel 4 driving circuit is in the process of driving the pixel 4 to emit light, at this time, the at least two different pixel 4 detecting modules acquire the light emitting parameters of the pixel 4, where the different pixel 4 detecting modules detect the different kinds of light emitting parameters, so as to acquire the at least two kinds of light emitting parameters in the process of driving the pixel 4 to emit light.
After obtaining at least two kinds of luminous parameters, respectively determining the compensation parameters corresponding to each luminous parameter, then respectively compensating the pixels 4 according to the determined compensation parameters, and in the process of driving the pixels 4 to emit light, performing luminous compensation on the pixels 4 at least twice through different compensation parameters, thereby improving the precision and accuracy of the luminous compensation, ensuring the luminous compensation to be more reliable and accurate, further improving the display effect of the pixels 4, and avoiding the problems that in the related art, the pixels 4 cannot be accurately compensated due to compensation deviation caused by performing luminous compensation on the pixels 4 once, and the display effect is poor.
In some examples of this embodiment, at least two different pixel 4 detection modules include: a brightness detection module and a temperature detection module; acquiring the light emitting parameters of the pixels 4 by at least two different pixel 4 detection modules comprises: acquiring the brightness of the pixel 4 during light emission through the brightness detection module; the temperature of the pixels 4 during light emission is obtained by the temperature detection module. It can be understood that the above-mentioned brightness detection module is disposed around the pixel 4, and the brightness detection module can detect the brightness of the pixel 4 and convert the brightness into a brightness signal when the pixel 4 emits light; similarly, the temperature detecting module is disposed around the pixel 4, and the brightness detecting module can detect the temperature of the pixel 4 and convert the brightness into a temperature signal when the pixel 4 emits light.
It can be understood that the specific configuration of the brightness detection module and/or the temperature detection module is not limited in this example, in some examples, the brightness detection module includes a photo resistor and a fixed resistor, one end of the fixed resistor is grounded, the other end of the fixed resistor is connected to one end of the photo resistor, the other end of the photo resistor is connected to the voltage output end, and the photo resistor is disposed near the pixel 4, so that when the pixel 4 emits light, the brightness signal is output according to the brightness adjustment resistance value of the pixel 4; in some examples, the other end of the photoresistor is connected to the output end of the control switch 1, that is, the output end of the control switch 1 is used as the voltage output end, so that when the control switch 1 outputs the data signal Dm, the photoresistor is connected to the output end of the control switch 1 to receive the voltage when the drive switch 2 drives the pixel 4 to emit light, and outputs a brightness signal according to the brightness of the pixel 4, wherein the brightness signal is an electrical signal converted from the brightness of the pixel 4; when the control switch 1 does not output the data signal Dm, the side, connected with the output end of the control switch 1, of the photoresistor does not receive voltage, and the brightness signal is not output, so that the condition that the photoresistor is always outputting the brightness signal is avoided, the service life of the photoresistor is prolonged, and the service life of the brightness detection module is prolonged; meanwhile, the other end of the photoresistor is connected with the output end of the control switch 1, multiplexing of a data signal Dm is achieved, a power supply is prevented from being independently arranged for the brightness detection module, and therefore the circuit size is reduced;
In some examples, the temperature detection module includes a thermistor and a fixed resistor, one end of the fixed resistor is grounded, the other end of the fixed resistor is connected with one end of the thermistor, the other end of the thermistor is connected with the voltage output end, and the thermistor is arranged near the pixel 4, so that when the pixel 4 emits light, a temperature signal is output according to the temperature regulation resistance value of the pixel 4, and the temperature signal is an electrical signal converted from the temperature of the pixel 4; in some examples, the other end of the thermistor is connected with the constant current source VDD, and the constant current source VDD is directly used as a voltage output end, so that multiplexing of the constant current source VDD is realized, a power supply is prevented from being independently arranged for the temperature detection module, and further the circuit size is reduced.
It can be appreciated that in some examples, the other end of the photoresistor may also be connected to a constant current source VDD; in some examples, the other end of the thermistor may also be connected to the output of the control switch 1; in some examples, the power supply may be separately set, and the other end of the thermistor are connected to the set power supply, so as to supply power to the brightness detection module and the temperature detection module, which is not limited in this embodiment.
In some examples of this embodiment, determining a compensation parameter corresponding to each of the light emission parameters, and performing light emission compensation on the pixel 4 according to at least two determined compensation parameters includes: determining a first compensation parameter according to the brightness of the pixel 4, and determining a second compensation parameter according to the temperature of the pixel 4; and respectively carrying out luminescence compensation on the pixels 4 according to the first compensation parameter and the second compensation parameter. Determining a brightness difference value according to the brightness of the light emitted by the pixel 4 and the target brightness which the pixel 4 should have, and determining a corresponding first compensation parameter according to the brightness difference value; similarly, determining a temperature difference according to the light-emitting temperature of the pixel 4 and the target temperature which the pixel 4 should have, and determining a corresponding first compensation parameter according to the temperature difference;
it can be appreciated that the method for determining the target brightness corresponding to the pixel 4 includes: acquiring the luminous efficiency and the on-current of the pixel 4, and determining the target brightness corresponding to the pixel 4 based on the on-current and the luminous efficiency; it can be understood that the pixels 4 correspond to different target brightnesses at the same on-current at different luminous efficiencies; specifically, the light-emitting efficiency decreases as the aging degree of the pixel 4 increases, and when the aging degree of the pixel 4 is high, the light-emitting efficiency is correspondingly low, and the target brightness corresponding to the pixel 4 under the same on-state current is low when the light-emitting efficiency is low; similarly, when the aging degree of the pixel 4 is low, the light emitting efficiency is correspondingly high, and the target brightness corresponding to the pixel 4 under the same on current is high when the light emitting efficiency is high, wherein the corresponding relation between the on current and the target brightness under different light emitting efficiencies can be set by related personnel according to actual conditions.
Similarly, the method for determining the target temperature corresponding to the pixel 4 includes: acquiring power consumption and on-current of the pixel 4, and determining a target temperature corresponding to the pixel 4 based on the on-current and the power consumption; it can be appreciated that at different power consumption, the pixels 4 correspond to different target temperatures at the same on-current; specifically, the power consumption deepens with the deepening of the aging degree of the pixel 4, and when the aging degree of the pixel 4 is high, the power consumption is correspondingly high, and the target temperature corresponding to the pixel 4 under the same power-on current is high when the power consumption is high; similarly, when the aging degree of the pixel 4 is low, the power consumption is correspondingly low, and when the power consumption is low, the target temperature corresponding to the pixel 4 under the same on current is low, wherein under different power consumption, the corresponding relation between the on current and the target temperature can be set by related personnel according to actual conditions.
After the first compensation parameter and the second compensation parameter are determined, carrying out primary luminescence compensation on the pixel 4 according to the first compensation parameter, and carrying out primary luminescence compensation on the pixel 4 through the second compensation parameter, so that at least two luminescence compensation on the pixel 4 is realized; furthermore, the problems that in the related art, when the pixel 4 is subjected to luminescence compensation only through the first compensation parameter or only through the second compensation parameter, the obtained brightness or temperature has deviation, so that the luminescence compensation of the pixel 4 has compensation deviation, the pixel 4 cannot be accurately compensated, and the display effect is poor are avoided; in the process of driving the pixels 4 to emit light, the pixels 4 are subjected to light emission compensation at least twice through different compensation parameters, so that the precision and accuracy of the light emission compensation are improved, the light emission compensation is more reliable and accurate, and the display effect of the pixels 4 is further improved.
In some examples of this embodiment, the at least two different pixel detection modules further comprise: a voltage detection module; acquiring the light emission parameters of the pixels 4 by at least two different pixel 4 detection modules further comprises: acquiring the conduction voltage drop of the pixel 4 during light emission through the voltage detection module; before performing the light emission compensation on the pixel 4 according to the first compensation parameter and the second compensation parameter, the method further comprises: if the conduction voltage drop is not matched with the target conduction voltage drop, determining the aging degree of the pixel 4 according to the conduction voltage drop; and determining the luminous efficiency and the power consumption of the pixel 4 according to the aging degree, wherein the luminous efficiency is used for determining the first compensation parameter in cooperation with the brightness of the pixel 4, and the power consumption is used for determining the second compensation parameter in cooperation with the temperature of the pixel 4.
The voltage detection module can respectively obtain the voltages of the anode of the pixel 4 and the cathode of the pixel 4, so as to obtain the conduction voltage drop of the pixel 4 in the process of lighting the pixel 4, wherein the target conduction voltage drop is a parameter updated according to the ageing degree of the pixel 4; specifically, when each pixel 4 leaves the factory, a conduction voltage drop exists, the conduction voltage drop is directly used as a target conduction voltage drop at the beginning, then the conduction voltage drop of the pixel 4 is obtained when the pixel 4 emits light, if the conduction voltage drop of the pixel 4 is not matched with the target conduction voltage drop, the aging occurs in the period, at this time, the aging degree of the pixel 4 is determined according to the conduction voltage drop, and the conduction voltage drop is used as a new target conduction voltage drop; if the on-voltage drop of the pixel 4 matches the target on-voltage drop, it indicates that the pixel 4 is not aged.
If the conduction voltage drop is not matched with the target conduction voltage drop, determining the aging degree of the pixel 4 according to the conduction voltage drop; the luminous efficiency and the power consumption of the pixel 4 are determined according to the aging degree, so that the luminous efficiency and the power consumption of the pixel 4 are updated, and the problem that the display effect is poor because the same luminous efficiency and/or the same power consumption are used for carrying out luminous compensation on the aged pixel 4 and the pixel 4 cannot be accurately subjected to luminous compensation is solved; in the process of driving the pixels 4 to emit light, the luminous efficiency and the power consumption are updated, and after the luminous efficiency and the power consumption are determined, the pixels 4 are subjected to luminous compensation at least twice through different compensation parameters, so that the precision and the accuracy of the luminous compensation are improved, the luminous compensation is more reliable and accurate, and the display effect of the pixels 4 is further improved.
In some examples of this implementation, performing luminescence compensation on the pixel 4 according to the determined at least two compensation parameters includes: compensating a data signal Dm corresponding to the pixel 4 according to the determined at least two compensation parameters, wherein the data signal Dm is used for controlling the conduction degree of a driving switch 2 corresponding to the pixel 4; and/or compensating the constant current source VDD corresponding to the pixel 4 according to the determined at least two compensation parameters.
Wherein, if the current flowing through the pixel 4 is controlled by the driving switch 2, it satisfies the following formula:
Figure BDA0004207094420000061
wherein W and L are the width and length of the channel of the driving switch 2, mu is the effective carrier mobility, cox is the capacitance per unit area of the gate oxide layer, and Vth is the threshold voltage of the driving switch 2.
It can be understood that the larger the current flowing through the pixel 4, the brighter the pixel 4 emits light, whereas the smaller the current flowing through the pixel 4, the less the pixel 4 emits light; as can be seen from the above formula, by modifying the constant current source VDD and the data signal Dm, the current flowing through the pixel 4 can be controlled, and compensating the data signal Dm corresponding to the pixel 4 according to the determined at least two compensation parameters includes: increasing the voltage value of the data signal Dm corresponding to the pixel 4 according to the determined at least two compensation parameters; or reducing the voltage value of the data signal Dm corresponding to the pixel 4 according to the determined at least two compensation parameters; the compensation of the constant current source VDD corresponding to the pixel 4 according to the determined at least two compensation parameters comprises: increasing the voltage value of the constant current source VDD corresponding to the pixel 4 according to the determined at least two compensation parameters; or reducing the voltage value of the constant current source VDD corresponding to the pixel 4 according to the determined at least two compensation parameter values.
For example, if the brightness of the pixel 4 is lower than the expected value, the voltage of the constant current source VDD may be increased or the data signal Dm may be decreased, so that the current flowing through the pixel 4 is increased to increase the light-emitting brightness of the pixel 4; conversely, if the brightness of the pixel 4 is higher than the expected value, the voltage of the constant current source VDD may be reduced or the data signal Dm may be increased, so that the current flowing through the pixel 4 is reduced, thereby increasing the light-emitting brightness of the pixel 4.
In some examples of this embodiment, before the light emitting parameters of the pixels 4 are acquired by the at least two pixel 4 detection modules, the method further includes: detecting the temperature of the environment outside the pixel 4 by an environment temperature detection module; determining a pre-compensation scheme corresponding to the pixels 4 with different colors according to the temperature of the environment outside the pixels 4; the pixels 4 are precompensated based on the precompensation scheme.
It can be understood that the relative light intensities of the pixels 4 with different colors at different ambient temperatures are different, where, as shown in fig. 3, fig. 3 is a basic schematic diagram of the ambient temperature and the relative light intensity of the pixel 4, where, in fig. 3, the abscissa is the ambient temperature change axis and the ordinate is the relative light intensity change axis, and, as shown in fig. 5, when the ambient temperature exceeds 30 °, the relative light intensity of the red pixel 4 is far lower than the light intensities of the blue pixel 4 and the green pixel 4, and if the red pixel 4, the blue pixel 4 and the green pixel 4 are driven by the same data signal Dm or the constant current source VDD, the light intensity of the red pixel 4 is necessarily lower than the light intensity of the green pixel 4, resulting in poor display effect; based on this, the present example also detects the temperature of the environment outside the pixel 4 by an ambient temperature detection module; determining a pre-compensation scheme corresponding to the pixels 4 with different colors according to the temperature of the environment outside the pixels 4; the pixels 4 are pre-compensated based on the pre-compensation scheme, so that the relative luminous intensity areas of the pixels 4 with different colors are consistent.
In the pixel compensation method provided by the embodiment, in the process of driving the pixels to emit light, the light emitting parameters of the pixels are obtained through at least two different pixel detection modules, wherein different pixel detection modules detect different kinds of light emitting parameters; respectively determining compensation parameters corresponding to each luminous parameter, and carrying out luminous compensation on the pixels according to at least two determined compensation parameters; after obtaining at least two kinds of luminous parameters, respectively determining the compensation parameters corresponding to each luminous parameter, then respectively compensating the pixels according to the determined compensation parameters, and carrying out luminous compensation on the pixels at least twice through different compensation parameters in the process of driving the pixels to emit light, thereby improving the precision and accuracy of luminous compensation, ensuring the luminous compensation to be more reliable and accurate, further improving the display effect of the pixels, and avoiding the problems that in the related art, the pixels are subjected to luminous compensation through one-time luminous compensation, the compensation deviation exists, the pixels cannot be accurately compensated, and the display effect is poor.
Example two
Based on the same concept, the present embodiment provides a pixel compensation circuit, as shown in fig. 4, the pixel 4 compensation circuit includes: the system comprises a control module 5 and at least two pixel detection modules, wherein each pixel detection module is connected with the control module 5;
The pixel 4 detection module is configured to obtain a light emitting parameter of the pixel 4 during driving the pixel 4 to emit light, where different pixel 4 detection modules detect different types of light emitting parameters;
the control module 5 is configured to determine compensation parameters corresponding to each of the light emission parameters, and perform light emission compensation on the pixel 4 according to the determined at least two compensation parameters.
It can be understood that the pixel compensation circuit further comprises a pixel driving circuit body, wherein the pixel driving circuit comprises a control switch 1, a driving switch 2 and a storage module 3, the output end of the driving switch 2 is connected with a pixel anode, the input end of the driving switch 2 is connected with a constant current source VDD, the control end of the control switch 1 is connected with a scanning signal Sn, the input end of the control switch 1 is connected with a data signal Dm, the output end of the control switch 1 is connected with the control end of the driving switch 2, one end of the storage module 3 is connected between the output end of the control switch 1 and the control end of the driving switch 2, and the other end of the storage module 3 is connected with the constant current source VDD; the working principle of the pixel driving circuit is that the t1 time line scanning circuit is turned on, the control switch 1 is turned on, a pixel driving signal is input at the same time, the driving switch 2 is turned on, the pixel signal is written into the storage module 3, the t2 time scanning signal is turned off, the voltage of the storage module 3 keeps the driving switch 2 on, and VDD continuously supplies current to the pixels 4.
It can be understood that the specific configuration of the brightness detection module 8 and/or the temperature detection module 6 is not limited in this example, in some examples, the brightness detection module 8 includes a photo resistor and a fixed resistor, one end of the fixed resistor is grounded, the other end of the fixed resistor is connected to one end of the photo resistor, the other end of the photo resistor is connected to the voltage output end, and the photo resistor is disposed near the pixel 4, so that when the pixel 4 emits light, the resistance value is adjusted according to the brightness of the pixel 4, so as to realize outputting a brightness signal; in some examples, the other end of the photoresistor is connected with the output end of the control switch 1, that is, the output end of the control switch 1 is used as the voltage output end, so that when the control switch 1 outputs a data signal, the photoresistor is connected with the output end of the control switch 1 to receive the voltage when the drive switch 2 drives the pixel 4 to emit light, and outputs a brightness signal according to the brightness of the pixel 4, wherein the brightness signal is an electrical signal converted from the brightness of the pixel 4; when the control switch 1 does not output a data signal, the side, connected with the output end of the control switch 1, of the photoresistor does not receive voltage, so that a brightness signal is avoided, the condition that the photoresistor is always outputting the brightness signal is avoided, the service life of the photoresistor is prolonged, and the service life of the brightness detection module 8 is prolonged; meanwhile, the other end of the photoresistor is connected with the output end of the control switch 1, multiplexing of data signals is achieved, a power supply is prevented from being independently arranged for the brightness detection module 8, and therefore circuit size is reduced;
In some examples, the temperature detection module 6 includes a thermistor and a fixed resistor, one end of the fixed resistor is grounded, the other end of the fixed resistor is connected with one end of the thermistor, the other end of the thermistor is connected with the voltage output end, and the thermistor is arranged near the pixel 4, so that when the pixel 4 emits light, a temperature signal is output according to the temperature regulation resistance value of the pixel 4, and the temperature signal is an electrical signal converted from the temperature of the pixel 4; in some examples, the other end of the thermistor is connected with the constant current source, and the constant current source is directly used as a voltage output end, so that multiplexing of the constant current source is realized, a power supply is prevented from being independently arranged for the temperature detection module 6, and further the circuit size is reduced.
It will be appreciated that in some examples, the other end of the photoresistor may also be connected to a constant current source; in some examples, the other end of the thermistor may also be connected to the output of the control switch 1; in some examples, the power supply may be separately set, and the other end of the thermistor are connected to the set power supply, so as to supply power to the brightness detection module 8 and the temperature detection module 6, which is not limited in this embodiment.
The pixel 4 compensation circuit further includes: the voltage detection module 7 is used for acquiring the conduction voltage drop of the pixel 4 when the pixel emits light; the control module 5 is further configured to determine an aging degree of the pixel 4 according to the on-voltage drop, and determine a light emitting efficiency and a power consumption of the pixel 4 according to the aging degree.
The voltage detection module 7 can respectively obtain voltages of an anode of the pixel 4 and a cathode of the pixel 4, so as to obtain a conduction voltage drop of the pixel 4 in a light emitting process of the pixel 4, wherein the target conduction voltage drop is a parameter updated according to the ageing degree of the pixel 4; specifically, when each pixel 4 leaves the factory, a conduction voltage drop exists, the conduction voltage drop is directly used as a target conduction voltage drop at the beginning, then the conduction voltage drop of the pixel 4 is obtained when the pixel 4 emits light, if the conduction voltage drop of the pixel 4 is not matched with the target conduction voltage drop, the aging occurs in the period, at this time, the aging degree of the pixel 4 is determined according to the conduction voltage drop, and the conduction voltage drop is used as a new target conduction voltage drop; if the on-voltage drop of the pixel 4 matches the target on-voltage drop, it indicates that the pixel 4 is not aged.
If the conduction voltage drop is not matched with the target conduction voltage drop, determining the aging degree of the pixel 4 according to the conduction voltage drop; the luminous efficiency and the power consumption of the pixel 4 are determined according to the aging degree, so that the luminous efficiency and the power consumption of the pixel 4 are updated, and the problem that the display effect is poor because the same luminous efficiency and/or the same power consumption are used for carrying out luminous compensation on the aged pixel 4 and the pixel 4 cannot be accurately subjected to luminous compensation is solved; in the process of driving the pixels 4 to emit light, the luminous efficiency and the power consumption are updated, and after the luminous efficiency and the power consumption are determined, the pixels 4 are subjected to luminous compensation at least twice through different compensation parameters, so that the precision and the accuracy of the luminous compensation are improved, the luminous compensation is more reliable and accurate, and the display effect of the pixels 4 is further improved.
Wherein performing light emission compensation on the pixel 4 according to the determined at least two compensation parameters comprises: compensating data signals corresponding to the pixels 4 according to the determined at least two compensation parameters, wherein the data signals are used for controlling the conduction degree of the driving switch 2 corresponding to the pixels 4; and/or compensating the constant current source corresponding to the pixel 4 according to the determined at least two compensation parameters.
It can be understood that the larger the current flowing through the pixel 4, the brighter the pixel 4 emits light, whereas the smaller the current flowing through the pixel 4, the less the pixel 4 emits light; compensating the data signal corresponding to the pixel 4 according to the determined at least two compensation parameters comprises: increasing the voltage value of the data signal corresponding to the pixel 4 according to the determined at least two compensation parameters; or reducing the voltage value of the data signal corresponding to the pixel 4 according to the determined at least two compensation parameters; the compensation of the constant current sources corresponding to the pixels 4 according to the determined at least two compensation parameters comprises: increasing the voltage value of the constant current source corresponding to the pixel 4 according to the determined at least two compensation parameters; or reducing the voltage value of the constant current source corresponding to the pixel 4 according to the determined at least two compensation parameter values.
In some examples of this embodiment, the pixel 4 compensation circuit further includes: an ambient temperature detection module 9, wherein the ambient temperature detection module 9 is configured to detect a temperature of an environment outside the pixel 4; determining a pre-compensation scheme corresponding to the pixels 4 with different colors according to the temperature of the environment outside the pixels 4; the pixels 4 are precompensated based on the precompensation scheme.
It can be understood that the combination of the modules of the pixel 4 compensation circuit provided in this example can implement each step of the above-mentioned pixel 4 compensation method, so as to achieve the same technical effects as each step of the above-mentioned pixel 4 compensation method, which is not described herein in detail.
Example III
The embodiment of the application provides a pixel compensation circuit, which comprises: the brightness detection module 8, the temperature detection module 6, the voltage detection module 7 and the ambient temperature detection module 9, wherein the brightness detection module 8 outputs a sense1 brightness signal, the temperature detection module 6 outputs a sense2 temperature signal, the voltage detection module 7 outputs a sense4 conduction voltage drop signal, and the ambient temperature detection module 9 outputs a sense3 external ambient temperature signal. As shown in fig. 5, fig. 5 is a basic schematic diagram of a pixel compensation circuit, where the pixel compensation circuit is used for compensating a pixel, and the pixel compensation circuit further includes a pixel driving circuit body, where the pixel driving circuit includes a control switch 1, a driving switch 2, and a storage module 3, where an output end of the driving switch 2 is connected to a pixel anode, an input end of the driving switch 2 is connected to a constant current source VDD, a control end of the control switch 1 is connected to a scan signal Sn, an input end of the control switch 1 is connected to a data signal Dm, an output end of the control switch 1 is connected to a control end of the driving switch 2, one end of the storage module 3 is connected between an output end of the control switch 1 and a control end of the driving switch 2, and another end of the storage module 3 is connected to the constant current source VDD;
In the bearing example, the driving switch 2 consists of a first thin film transistor M1, the control switch 1 consists of a second thin film transistor M2, the storage switch consists of a storage capacitor C1, the pixel is an OLED, wherein the output end of the M1 is connected with the anode of the OLED, the input end of the M1 is connected with a constant current source VDD, the control end of the M2 is connected with a scanning signal Sn, the input end of the M2 is connected with a data signal Dm, the output end of the M2 is connected with the control end of the M1, one end of the C1 is connected between the output end of the M2 and the control end of the M1, and the other end of the C1 is connected with the constant current source VDD; the working principle of the pixel driving circuit is that the line scanning circuit is turned on at the time of t1, M2 is turned on, a pixel driving signal is input at the same time, M1 is turned on, a pixel signal is written into C1, the scanning signal at the time of t2 is turned off, the C1 voltage keeps M1 on, and VDD continuously supplies current to the OLED.
In some examples, the brightness detection module is disposed near the OLED to detect the brightness of the OLED when the OLED emits light, and one end of the brightness detection module is connected to the output end of the control switch 1, for outputting a brightness signal sense1; specifically, the brightness detection module comprises a photoresistor R1 and a fixed resistor R2, one end of the fixed resistor R2 is grounded, the other end of the fixed resistor R2 is connected with one end of the photoresistor R1, the other end of the photoresistor R1 is connected with the output end of the M2, and the photoresistor is arranged nearby the OLED, so that when the OLED emits light, the resistance value is adjusted according to the brightness of the OLED, and a brightness signal Sense1 is output; it can be understood that one end of the photoresistor is connected with the output end of the M2, that is, the data signal Dm is further output by the M2, so that when the M1 drives the OLED to emit light, the voltage is received by the side, connected with the output end of the M2, of the photoresistor R1, and the brightness signal Sense1 is output according to the brightness of the OLED; when the data signal Dm is not output by the M2, the voltage is not received at the side, connected with the output end of the M2, of the photoresistor, so that the brightness signal is not output, the condition that the brightness detection module 8 is always outputting the brightness signal is avoided, the service life of the thermistor R1 is prolonged, and the service life of the brightness detection module 8 is prolonged; meanwhile, the other end of the photoresistor R1 is connected with the output end of the M2, multiplexing of a data signal Dm is achieved, a power supply is prevented from being independently arranged for the brightness detection module 8, and therefore the circuit size is reduced;
In some examples, the temperature detection module 6 is disposed near the OLED to detect the temperature of the OLED when the OLED emits light, and the temperature detection module 6 is connected to VDD; specifically, the temperature detection module 6 includes a first thermistor RT1 and a second fixed resistor R3, one end of the second fixed resistor R3 is grounded, the other end of the second fixed resistor R3 is connected with one end of the first thermistor RT1, the other end of the first thermistor RT1 is connected with a constant current source VDD, the constant current source VDD is directly used as a voltage output end, the first thermistor RT1 is arranged near an OLED, and when the OLED emits light, a temperature signal sense2 is output according to the temperature regulation resistance of the OLED, and the temperature signal sense2 is an electrical signal converted from the OLED temperature.
In some examples, the voltage detection module 7 includes two input ends, where the two input ends are respectively disposed at a cathode and an anode of the OLED, and are used to obtain voltages of the anode and the cathode of the OLED, so as to obtain a conduction voltage drop of the OLED in a light emitting process of the OLED, and output a conduction voltage drop signal Sense4, where the target conduction voltage drop is a parameter updated according to an aging degree of the OLED; specifically, when each OLED leaves the factory, a conduction voltage drop exists, the conduction voltage drop is directly used as a target conduction voltage drop at the beginning, then the conduction voltage drop of the OLED is obtained when the OLED emits light, if the conduction voltage drop of the OLED is not matched with the target conduction voltage drop, aging occurs in the period, at this time, the aging degree of the OLED is determined according to the conduction voltage drop, and the conduction voltage drop is used as a new target conduction voltage drop; if the on-voltage drop of the OLED is matched with the target on-voltage drop, the fact that the OLED is not aged continuously is indicated.
In some examples, the ambient temperature detection module 9 includes: the constant current source, the second thermistor RT2 and the third fixed resistor R4 are sequentially connected, one end of the third fixed resistor R4 is grounded, and the ambient temperature detection module 9 is used for outputting an external ambient temperature signal sense3;
it can be understood that the control module 5 is connected to the above-mentioned brightness detection module 8, temperature detection module 6, voltage detection module 7 and ambient temperature detection module 9, respectively, and is configured to receive signals returned from the brightness detection module 8, temperature detection module 6, voltage detection module 7 and ambient temperature detection module 9.
Before leaving the factory, the difference of the brightness and the temperature can be caused by the manufacturing difference of the OLED lamps, the balance adjustment is carried out, only one unit is adjusted at a time, the OLED1 is lightened, the ambient temperature is room temperature, the temperature detected by the sense2 is approximately equal to the temperature of the OLED lamps, but the light intensity and the temperature difference of the OLED lamps which are manufactured in the same way can be caused because the OLED lamps cannot be manufactured completely. The temperature, the conduction voltage drop (VF) and the light brightness at the moment are recorded, the VF is less influenced by the temperature, and the VF is more influenced by the ageing degree of the device. Initial data for each OLED lamp at ambient temperature (-40 ℃,60 ℃) were collected, first compensating for the different devices. The control module needs to store a plurality of initial data (device characteristic relation) of VF, OLED temperature and luminous efficiency at first, so that later recall of compensation after aging is facilitated.
For the working state after leaving the factory, the electronic product is started, and the temperature test is carried out through the ambient temperature detection module, because the application scene and the temperature change of the electronic product are quick, and the RGB curves are different along with the temperature, before each start, the ambient temperature is detected, and if the temperature is changed, the initial coefficient of the current is adjusted according to the relation between the temperature curve and the light intensity. After the scanning signal and the data signal, C1 is charged, sense1 is a brightness signal, sense the brightness change of the OLED lamp and compare with the target brightness, if the brightness changes due to other factors, feed back to the control module to carry out brightness correction, when M1 is closed, M3 is opened, the temperature of the displayed OLED lamp is detected, when VF detected by sense4 is unchanged, the device is considered to be in an aging-free state,
the temperature supplement at this point invokes the original data. However, as the device ages, VF increases, power consumption increases and luminous efficiency decreases after VF increases, and if the initial data is reused at this time, the offset of compensation will be larger, and at this time, the temperature and luminous efficiency relationships corresponding to different VF of the control module are called to revise the compensation data again.
The method has reasonable correction means at the initial stage, after aging and when the temperature changes, so that the display brightness is more accurate.
The method can solve the problems of ageing of the circuit and offset caused by temperature change, the luminous brightness of the OLED can be adjusted at any time, and the accuracy is high, so that the display is more uniform.
Example IV
An embodiment of the present application provides a display panel, as shown in fig. 6, including: a plurality of pixels 4 arranged in an array, each of the pixels being connected to a corresponding drive circuit 10, and at least part of the pixels being provided with a pixel compensation circuit as described in any one of the above.
The present application also provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the pixel compensation method provided by any one of the method embodiments described above.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is only a specific embodiment of the invention to enable those skilled in the art to understand or practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A pixel compensation method, the pixel compensation method comprising:
in the process of driving a pixel to emit light, obtaining the light emitting parameters of the pixel through at least two different pixel detection modules, wherein the different pixel detection modules detect different kinds of light emitting parameters;
and respectively determining compensation parameters corresponding to each luminous parameter, and carrying out luminous compensation on the pixels according to the determined at least two compensation parameters.
2. The pixel compensation method of claim 1, wherein the at least two different pixel detection modules comprise: a brightness detection module and a temperature detection module; obtaining, by at least two different pixel detection modules, a light emission parameter of the pixel, comprising:
Acquiring the brightness of the pixel when the pixel emits light through the brightness detection module;
and acquiring the temperature of the pixel during light emission through the temperature detection module.
3. The pixel compensation method according to claim 2, wherein determining compensation parameters corresponding to each of the light emission parameters, respectively, and performing light emission compensation on the pixel according to the determined at least two compensation parameters, comprises:
determining a first compensation parameter according to the brightness of the pixel, and determining a second compensation parameter according to the temperature of the pixel;
and respectively carrying out luminescence compensation on the pixels according to the first compensation parameter and the second compensation parameter.
4. The pixel compensation method of claim 3, wherein the at least two different pixel detection modules further comprise: a voltage detection module; acquiring the light emitting parameters of the pixels by at least two different pixel detection modules further comprises: acquiring the conduction voltage drop of the pixel during light emission through the voltage detection module;
before performing light emission compensation on the pixel according to the first compensation parameter and the second compensation parameter, the method further includes:
if the conduction voltage drop is not matched with the target conduction voltage drop, determining the aging degree of the pixel according to the conduction voltage drop;
And determining the luminous efficiency and the power consumption of the pixel according to the aging degree, wherein the luminous efficiency is used for determining the first compensation parameter in cooperation with the brightness of the pixel, and the power consumption is used for determining the second compensation parameter in cooperation with the temperature of the pixel.
5. The pixel compensation method according to claim 1, wherein performing light emission compensation on the pixel according to the determined at least two compensation parameters comprises:
compensating data signals corresponding to the pixels according to the determined at least two compensation parameters, wherein the data signals are used for controlling the conduction degree of the driving switches corresponding to the pixels; and/or the number of the groups of groups,
and compensating the constant current source corresponding to the pixel according to the determined at least two compensation parameters.
6. The pixel compensation method of claim 1, wherein prior to obtaining the light emission parameters of the pixel by at least two pixel detection modules, the method further comprises:
detecting the temperature of the environment outside the pixel through an environment temperature detection module;
determining a pre-compensation scheme corresponding to the pixels with different colors according to the temperature of the external environment of the pixels;
the pixels are precompensated based on the precompensation scheme.
7. A pixel compensation circuit, the pixel compensation circuit comprising: the system comprises a control module and at least two pixel detection modules, wherein each pixel detection module is connected with the control module;
the pixel detection module is used for acquiring the luminous parameters of the pixels in the process of driving the pixels to emit light, wherein different pixel detection modules detect different kinds of luminous parameters;
the control module is used for respectively determining compensation parameters corresponding to each luminous parameter and carrying out luminous compensation on the pixels according to the determined at least two compensation parameters.
8. The pixel compensation circuit of claim 7, wherein the pixel compensation circuit further comprises: the voltage detection module is used for acquiring the conduction voltage drop of the pixel when the pixel emits light;
the control module is also used for determining the aging degree of the pixel according to the conduction voltage drop and determining the luminous efficiency and the power consumption of the pixel according to the aging degree.
9. The pixel compensation circuit of claim 7, wherein the pixel compensation circuit further comprises: the ambient temperature detection module is used for detecting the temperature of the external environment of the pixel;
The control module is also used for determining a precompensation scheme corresponding to the pixels with different colors according to the temperature of the environment outside the pixels, and precompensating the pixels based on the precompensation scheme.
10. A display panel, the display panel comprising: a plurality of pixels arranged in an array, each of the pixels being connected to a corresponding drive circuit, and at least part of the pixels being provided with a pixel compensation circuit as claimed in any one of claims 7 to 9.
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CN115662329A (en) * 2022-10-24 2023-01-31 集创北方(珠海)科技有限公司 Display device and driving method thereof

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