Method for prolonging service life of organic light-emitting device
By comparing initial and standard parameters, combining real-time and historical operation data analysis curves, determining performance evaluation indexes and formulating optimization strategies, the problem of time-consuming and cost-effective traditional life evaluation methods is solved, and the life of organic electroluminescent devices is significantly improved.
Patent Information
- Application Number
- CN202411402709.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2024-12-27
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The traditional life evaluation method of organic electroluminescent devices is time-consuming, costly and difficult to accurately reflect the performance degradation of the device under actual use conditions.
By obtaining initial and standard device parameters for comparison, combining real-time and historical operating parameters to analyze the operating curve, and determining the performance evaluation index, thus developing optimization strategies to improve device life.
A more accurate and efficient life evaluation is achieved, significantly improving the life of organic electroluminescent devices.
Smart Images
Figure CN119202512A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of lifespan assessment, and in particular to a method for improving the lifespan of an organic electroluminescent device. Background Art
[0002] Currently, organic electroluminescent devices have attracted extensive attention in the display and lighting fields due to their excellent display performance and broad application prospects. The life evaluation of devices has always been the focus of industry and academia.
[0003] However, traditional lifetime assessment methods are often time-consuming, costly, and difficult to accurately reflect the performance degradation of devices under actual usage conditions.
[0004] Therefore, the present invention provides a method for increasing the lifespan of an organic electroluminescent device. Summary of the invention
[0005] The invention provides a method for improving the service life of an organic electroluminescent device, which is used to solve the problems of short service life and weak performance evaluation capability of the device in the prior art.
[0006] The present invention provides a method for improving the life of an organic electroluminescent device, comprising: Step 1: obtaining initial device parameters of a target organic electroluminescent device, and comparing the initial device parameters with standard device parameters to obtain a first comparison result, thereby determining a first life basis of the target organic electroluminescent device; Step 2: acquiring real-time operating parameters and historical operating parameters of the target organic electroluminescent device, thereby obtaining an operating curve of each sub-operating parameter, thereby obtaining a first operating curve set; Step 3: determining the operating state of each first operating curve in the first operating curve set, thereby determining the parameter stability of the corresponding sub-operating parameter, thereby determining the second life basis of the target organic electroluminescent device, and combining the first life basis to obtain the performance evaluation index of the target organic electroluminescent device; Step 4: Determine a device optimization strategy for the target organic electroluminescent device based on the performance evaluation index, thereby improving the device lifespan.
[0007] The first basis for determining the life span of the target organic electroluminescent device provided by the present invention includes: Step 11: acquiring initial device parameters and an initial device image of the target organic electroluminescent device based on a preset sensor; Step 12: Performing an initial judgment on the appearance of the target organic electroluminescent device based on the initial device image; If the initial judgment result shows that the appearance is damaged, then the initial life of the target organic electroluminescent device is obtained based on the damage range; If the initial judgment result shows that there is no appearance damage, the initial life of the organic electroluminescent device is judged to be 0; Step 13: Perform a first comparison between the initial device parameters and the standard device parameters of the target organic electroluminescent device to obtain a first comparison result, thereby determining a first life span basis of the target organic electroluminescent device.
[0008] The first basis for determining the life span of the target organic electroluminescent device provided by the present invention includes: Step 131: performing a first comparison between the initial device parameters and the standard device parameters of the target organic electroluminescent device to obtain a first parameter difference between the initial device parameters and each parameter in the standard device parameters; Step 132: extracting initial device parameters whose first parameter difference is greater than the preset parameter difference to obtain second device parameters; Step 133: comprehensively determining a first life basis of the target organic electroluminescent device based on a ratio of a second parameter value of the second device parameter to the first parameter value of the initial device parameter and a parameter value of the second device parameter.
[0009] According to the present invention, the real-time operating parameters and historical operating parameters of the target organic electroluminescent device are obtained, so as to obtain the operating curve of each sub-operating parameter, thereby obtaining a first operating curve set, including: Step 21: obtaining the real-time operating parameters of the target organic electroluminescent device and a set of historical operating parameters of the target organic electroluminescent device during its historical operation; Step 22: Sort the historical moments corresponding to each historical operating parameter in the historical operating parameter set to obtain an ordered first ordered operating parameter set; Step 23: classify the first set of operating parameters based on the parameter type corresponding to each sub-operating parameter in the first set of ordered operating parameters to obtain a second set of ordered operating parameters; Step 24: inputting the operating parameters of each second ordered operating parameter subset in the second ordered operating parameter set into the same coordinate system to obtain a second operating curve of the current second ordered operating parameter subset; Step 25: Obtain a first operating curve set of the target organic electroluminescent device based on each second operating curve.
[0010] The performance evaluation index of the target organic electroluminescent device provided by the present invention includes: Step 31: determining a curve reference value corresponding to the second operation curve based on a curve peak value and a curve valley value of each second operation curve in the first operation curve set; Step 32: Compare the deviation degree of the data point of each operating parameter in the second operating curve with the curve reference value, so as to determine the comprehensive deviation degree of each second operating curve; Step 33: determining the first parameter stability of the target organic electroluminescent device based on the comprehensive deviation degree of each second operating curve; Step 34: Acquire the real-time environmental parameters of the target organic electroluminescent device and the historical environmental parameters during the historical working process; Step 35: Compare the historical environment parameter with the real-time environment parameter, so as to determine the historical environment parameter at the historical moment with the highest degree of consistency with the real-time environment parameter as the first environment parameter; Step 36: Classify each sub-environment parameter in the historical environment parameter based on the parameter type to obtain a first classified environment parameter set; Step 37: Compare each classified environment parameter subset in the first classified environment parameter set, thereby extracting the median of each classified parameter subset as the first historical sub-parameter of the current parameter type; Step 38: combining each first historical sub-parameter in the first classification environmental parameter set to obtain a second environmental parameter of the target organic electroluminescent device; Step 39: extracting the historical device parameters corresponding to the first environmental parameters as the first historical device parameters, and predicting the historical device parameters corresponding to the second environmental parameters based on the historical device parameters corresponding to each historical environmental parameter to obtain the second historical device parameters; Step 310: obtaining a second parameter stability of the target organic electroluminescent device based on a first device parameter difference between the first historical device parameter and the initial device parameter and a second device parameter difference between the second historical device parameter and the initial device parameter; Step 311: combining the first parameter stability with the second parameter stability to obtain a second life basis of the target organic electroluminescent device, thereby determining a performance evaluation index of the target organic electroluminescent device in combination with the first life basis.
[0011] The performance evaluation index provided by the present invention includes: Get the performance evaluation index S; ; Wherein, S is the performance evaluation index of the target organic electroluminescent device, is the number of the second device parameters, is the i-th initial device parameter of the target organic electroluminescent device, is the standard device parameter corresponding to the i-th initial device parameter of the target organic electroluminescent device, is the characteristic conversion coefficient, is the real-time temperature of the target organic electroluminescent device, is the temperature conversion coefficient, is the operating driving current of the target organic electroluminescent device at the jth measurement moment, is the operating driving current of the target organic electroluminescent device at the j-1th measurement moment, is the operating driving current of the target organic electroluminescent device at the j+1th measurement moment, is the current conversion coefficient, The performance evaluation influence weights of the initial device parameters, The performance evaluation impact weight of real-time temperature, is the performance evaluation influence weight of the driving current, n is the number of initial device parameters, m is the number of measurement moments of the target organic electroluminescent device in the current measurement cycle, The first lifespan basis for the target organic electroluminescent device, It is a second lifespan basis of the target organic electroluminescent device.
[0012] According to the present invention, a device optimization strategy for determining a target organic electroluminescent device based on a performance evaluation index, thereby improving the device life, includes: Step 41: comparing the performance evaluation index of the target organic electroluminescent device with a preset evaluation strategy database, thereby extracting a first device optimization strategy corresponding to the performance evaluation index; Step 42: combining the initial device parameters of the target organic electroluminescent device with the first device optimization strategy, thereby optimizing the device parameters and improving the life of the target organic electroluminescent device.
[0013] After the device parameter optimization is performed according to the present invention, the method further includes: testing the parameter optimization result, specifically including: Step 01: Obtaining the second initial device parameters of the target organic electroluminescent device after device parameter optimization; Step 02: determining a second performance evaluation index based on the second initial device parameter, and comparing the second performance evaluation index with the performance evaluation index; If the second performance evaluation index is greater than the performance evaluation index, the parameter optimization result is qualified; If the second performance evaluation index is not greater than the performance evaluation index, the device parameter optimization needs to be performed again.
[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a method for improving the lifespan of an organic electroluminescent device, which obtains a first lifespan basis by comparing device parameters of the organic electroluminescent device, obtains operating parameters to determine a second lifespan basis, and combines the first lifespan basis and the second lifespan basis to determine a multi-dimensional performance evaluation index, thereby being able to improve the lifespan of the organic electroluminescent device to a greater extent. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0016] Figure 1 The present invention provides a flowchart of a method for improving the life of an organic electroluminescent device. DETAILED DESCRIPTION
[0017] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0018] Embodiment 1: The embodiment of the present invention provides a method for improving the life of an organic electroluminescent device, such as Figure 1 As shown, including: Step 1: obtaining initial device parameters of a target organic electroluminescent device, and comparing the initial device parameters with standard device parameters to obtain a first comparison result, thereby determining a first life basis of the target organic electroluminescent device; Step 2: acquiring real-time operating parameters and historical operating parameters of the target organic electroluminescent device, thereby obtaining an operating curve of each sub-operating parameter, thereby obtaining a first operating curve set; Step 3: determining the operating state of each first operating curve in the first operating curve set, thereby determining the parameter stability of the corresponding sub-operating parameter, thereby determining the second life basis of the target organic electroluminescent device, and combining the first life basis to obtain the performance evaluation index of the target organic electroluminescent device; Step 4: Determine a device optimization strategy for the target organic electroluminescent device based on the performance evaluation index, thereby improving the device lifespan.
[0019] In this embodiment, the initial device parameters include device material parameters, device morphology parameters, device brightness and other parameters.
[0020] In this embodiment, the standard device parameters refer to the standard parameters of the target organic electroluminescent device under the current circuit state, wherein the standard device parameters include: device material parameters, device morphology parameters (length, width, shape, state and other parameters), device brightness and the like.
[0021] In this embodiment, the first life basis is determined based on the comparison result after comparing the initial device parameters with the standard device parameters.
[0022] In this embodiment, the real-time operating parameters include operating parameters such as start-up voltage, driving voltage, current density, luminous brightness, luminous efficiency, and emission spectrum.
[0023] In this embodiment, the historical operating parameters are operating parameters of the organic electroluminescent device during the historical light-emitting process.
[0024] In this embodiment, the first operating curve set is a curve set obtained by orderly arranging each operating parameter of the target organic electroluminescent device in the historical operating process, inputting them into the same coordinate system to obtain the second operating curve, and integrating each second operating curve.
[0025] In this embodiment, parameter stability includes the stability of operating parameters and the stability of parameters under different historical environments.
[0026] In this embodiment, the second lifespan is based on the degree of parameter deviation and environmental factors.
[0027] In this embodiment, the performance evaluation index is comprehensively determined based on the first life basis and the second life basis.
[0028] In this embodiment, the device optimization strategy is to compare the performance evaluation index of the target organic electroluminescent device with a preset evaluation strategy database to determine the device optimization strategy corresponding to the performance evaluation index, wherein the first device optimization strategy includes: adjusting the pass current, adjusting the pass voltage, adjusting the operating temperature, adjusting the stability of the input current, etc.
[0029] The beneficial effect of the above technical solution is: by comparing the device parameters of the organic electroluminescent device, a first life basis is obtained, and the operating parameters are obtained to determine the second life basis, and a multi-dimensional performance evaluation index is determined by combining the first life basis and the second life basis, thereby being able to maximize the life of the organic electroluminescent device.
[0030] Embodiment 2: Based on Example 1, the first lifespan basis of the target organic electroluminescent device is determined, including: Step 11: acquiring initial device parameters and an initial device image of the target organic electroluminescent device based on a preset sensor; Step 12: Performing an initial judgment on the appearance of the target organic electroluminescent device based on the initial device image; If the initial judgment result shows that the appearance is damaged, then the initial life of the target organic electroluminescent device is obtained based on the damage range; If the initial judgment result shows that there is no appearance damage, the initial life of the organic electroluminescent device is judged to be 0; Step 13: Perform a first comparison between the initial device parameters and the standard device parameters of the target organic electroluminescent device to obtain a first comparison result, thereby determining a first life span basis of the target organic electroluminescent device.
[0031] In this embodiment, the initial device parameters include device material parameters, device morphology parameters, device brightness and other parameters.
[0032] In this embodiment, the initial device image refers to a device appearance image of the target organic electroluminescent device in the current circuit state.
[0033] In this embodiment, the initial lifespan is based on a judgment result obtained by initially judging the device lifespan of the organic electroluminescent device according to the degree of damage and the damaged area when the initial device image shows that the target organic electroluminescent device has device appearance damage.
[0034] In this embodiment, the first life basis is determined based on the comparison result after comparing the initial device parameters with the standard device parameters.
[0035] The beneficial effect of the above technical solution is: by comparing the initial device parameters of the organic electroluminescent device with the standard device parameters, a first life basis is obtained, and a multi-parameter and multi-dimensional performance evaluation can be performed in combination with the second life basis, thereby greatly improving the life of the organic electroluminescent device.
[0036] Embodiment 3: Based on Example 2, the first lifespan basis of the target organic electroluminescent device is determined, including: Step 131: performing a first comparison between the initial device parameters and the standard device parameters of the target organic electroluminescent device to obtain a first parameter difference between the initial device parameters and each parameter in the standard device parameters; Step 132: extracting initial device parameters whose first parameter difference is greater than the preset parameter difference to obtain second device parameters; Step 133: comprehensively determining a first life basis of the target organic electroluminescent device based on a ratio of a second parameter value of the second device parameter to the first parameter value of the initial device parameter and a parameter value of the second device parameter.
[0037] In this embodiment, the initial device parameters include device material parameters, device morphology parameters, device brightness and other parameters.
[0038] In this embodiment, the standard device parameters refer to the standard parameters of the target organic electroluminescent device under the current circuit state, wherein the standard device parameters include: device material parameters, device morphology parameters (length, width, shape, state and other parameters), device brightness and the like.
[0039] In this embodiment, the first parameter difference refers to the parameter difference between each parameter in the initial device parameters and each parameter of the corresponding standard device parameters. For example, if the device brightness in the initial device parameters is 1050 cd / m² and the device brightness in the standard device parameters is 1000 cd / m², then the corresponding first parameter difference is 50 cd / m².
[0040] In this embodiment, the second device parameters refer to a parameter set consisting of device parameters whose first parameter difference is greater than the preset parameter difference in the initial device parameters.
[0041] In this embodiment, the second parameter quantity refers to the number of device parameters in the second device parameters, and the first parameter quantity refers to the number of device parameters in the initial device parameters.
[0042] In this embodiment, the first life basis is determined based on a ratio of the second parameter quantity to the first parameter quantity and a parameter value in the second device parameter.
[0043] The beneficial effect of the above technical solution is: by comparing the initial device parameters of the organic electroluminescent device with the standard device parameters, a first life basis is obtained, and a multi-parameter and multi-dimensional performance evaluation can be performed in combination with the second life basis, thereby greatly improving the life of the organic electroluminescent device.
[0044] Embodiment 4: Based on Example 2, a first operation curve set is obtained, including: Step 21: obtaining the real-time operating parameters of the target organic electroluminescent device and a set of historical operating parameters of the target organic electroluminescent device during its historical operation; Step 22: Sort the historical moments corresponding to each historical operating parameter in the historical operating parameter set to obtain an ordered first ordered operating parameter set; Step 23: classify the first set of operating parameters based on the parameter type corresponding to each sub-operating parameter in the first set of ordered operating parameters to obtain a second set of ordered operating parameters; Step 24: inputting the operating parameters of each second ordered operating parameter subset in the second ordered operating parameter set into the same coordinate system to obtain a second operating curve of the current second ordered operating parameter subset; Step 25: Obtain a first operating curve set of the target organic electroluminescent device based on each second operating curve.
[0045] In this embodiment, the real-time operating parameters include operating parameters such as start-up voltage, driving voltage, current density, luminous brightness, luminous efficiency, and emission spectrum.
[0046] In this embodiment, the historical operating parameter set is a set consisting of operating parameters of the organic electroluminescent device during the historical light-emitting process.
[0047] In this embodiment, the first ordered operating parameter set is an operating parameter set obtained by arranging the operating times of the historical operating parameters in order.
[0048] In this embodiment, the second ordered operating parameter set is an operating parameter set obtained by classifying the operating parameters of each parameter type in the first ordered operating parameter set according to different parameter types. For example, the first ordered operating parameter set includes {(A, a, h1)(B, b, h2)(C, c, h3)}, where A, B, and C are operating parameters of the same parameter type, and the second ordered operating parameter set is {(A, B, C)(a, b, c)(h1, h2, h3)}.
[0049] In this embodiment, the second operation curve is determined based on the parameter value of each second operation parameter subset in the second ordered operation parameters and the corresponding operation time, wherein the horizontal axis of the second operation curve represents the operation time and the vertical axis represents the operation parameter value.
[0050] In this embodiment, the first operating curve set is a curve set obtained by integrating each second operating curve of the target organic electroluminescent device.
[0051] The beneficial effect of the above technical solution is: by obtaining the operating curve of each operating parameter of the organic electroluminescent device to analyze the second life basis of the organic electroluminescent device, the performance evaluation index can be more accurately determined in combination with the first life basis to optimize the parameters and achieve life extension.
[0052] Embodiment 5: Based on Example 4, the performance evaluation index of the target organic electroluminescent device is obtained, including: Step 31: determining a curve reference value corresponding to the second operation curve based on a curve peak value and a curve valley value of each second operation curve in the first operation curve set; Step 32: Compare the deviation degree of the data point of each operating parameter in the second operating curve with the curve reference value, so as to determine the comprehensive deviation degree of each second operating curve; Step 33: determining the first parameter stability of the target organic electroluminescent device based on the comprehensive deviation degree of each second operating curve; Step 34: Acquire the real-time environmental parameters of the target organic electroluminescent device and the historical environmental parameters during the historical working process; Step 35: Compare the historical environment parameter with the real-time environment parameter, so as to determine the historical environment parameter at the historical moment with the highest degree of consistency with the real-time environment parameter as the first environment parameter; Step 36: Classify each sub-environment parameter in the historical environment parameter based on the parameter type to obtain a first classified environment parameter set; Step 37: Compare each classified environment parameter subset in the first classified environment parameter set, thereby extracting the median of each classified parameter subset as the first historical sub-parameter of the current parameter type; Step 38: combining each first historical sub-parameter in the first classification environmental parameter set to obtain a second environmental parameter of the target organic electroluminescent device; Step 39: extracting the historical device parameters corresponding to the first environmental parameters as the first historical device parameters, and predicting the historical device parameters corresponding to the second environmental parameters based on the historical device parameters corresponding to each historical environmental parameter to obtain the second historical device parameters; Step 310: obtaining a second parameter stability of the target organic electroluminescent device based on a first device parameter difference between the first historical device parameter and the initial device parameter and a second device parameter difference between the second historical device parameter and the initial device parameter; Step 311: combining the first parameter stability with the second parameter stability to obtain a second life basis of the target organic electroluminescent device, thereby determining a performance evaluation index of the target organic electroluminescent device in combination with the first life basis.
[0053] In this embodiment, the curve reference value refers to the curve average value determined by the curve peak value and the curve valley value of each second operation curve. For example, if the curve peak value is 3 and the curve valley value is 1, then the curve reference value is 2.
[0054] In this embodiment, the data point deviation degree refers to the deviation degree between the parameter value of the operating parameter at each operating moment in the second operating curve and the curve reference value.
[0055] In this embodiment, the comprehensive deviation degree is based on the average deviation degree of the parameter values of the operating parameters at all operating moments in the second operating curve from the data points of the curve reference value.
[0056] In this embodiment, the stability of the first parameter is determined based on the comprehensive deviation degree. The larger the value of the comprehensive deviation degree is, the worse the corresponding stability of the first parameter is.
[0057] In this embodiment, the first environmental parameter is a historical environmental parameter at a historical moment that has the highest degree of consistency with the real-time environmental parameter.
[0058] In this embodiment, the first historical sub-parameter is determined by comparing each classification environment parameter subset in the first classification environment parameter set, thereby extracting the median of each classification parameter subset, wherein each classification parameter subset corresponds to a first historical sub-parameter.
[0059] In this embodiment, the second environmental parameter is an environmental parameter determined by arranging each first historical sub-parameter.
[0060] In this embodiment, the first historical device parameter is a historical device parameter corresponding to the first environmental parameter, and the second historical device parameter is a historical device parameter corresponding to the second environmental parameter predicted based on the historical device parameter corresponding to each historical environmental parameter.
[0061] In this embodiment, the first device parameter difference is a parameter difference between the first historical device parameter and the initial device parameter, and the second device parameter difference is a parameter difference between the second historical device parameter and the initial device parameter.
[0062] In this embodiment, the second parameter stability is determined based on the difference fluctuation between the first device parameter difference and the second device parameter difference, wherein the greater the difference between the device parameter differences, the worse the second parameter stability.
[0063] In this embodiment, the second life span is determined by combining the first parameter stability and the second parameter stability.
[0064] In this embodiment, the performance evaluation index is comprehensively determined based on the first life basis and the second life basis.
[0065] The beneficial effect of the above technical solution is: by combining the first life basis with the second life basis to determine the performance evaluation index of the organic electroluminescent device, the device performance of the target organic electroluminescent device can be determined more intuitively and accurately, thereby more accurately optimizing the device parameters and improving the device life.
[0066] Embodiment 6: Based on Example 5, the performance evaluation index is obtained, including: Get the performance evaluation index S; ; Wherein, S is the performance evaluation index of the target organic electroluminescent device, is the number of the second device parameters, is the i-th initial device parameter of the target organic electroluminescent device, is the standard device parameter corresponding to the i-th initial device parameter of the target organic electroluminescent device, is the characteristic conversion coefficient, is the real-time temperature of the target organic electroluminescent device, is the temperature conversion coefficient, is the operating driving current of the target organic electroluminescent device at the jth measurement moment, is the operating driving current of the target organic electroluminescent device at the j-1th measurement moment, is the operating driving current of the target organic electroluminescent device at the j+1th measurement moment, is the current conversion coefficient, The performance evaluation influence weights of the initial device parameters, The performance evaluation impact weight of real-time temperature, is the performance evaluation influence weight of the driving current, n is the number of initial device parameters, m is the number of measurement moments of the target organic electroluminescent device in the current measurement cycle, The first lifespan basis for the target organic electroluminescent device, It is a second lifespan basis of the target organic electroluminescent device.
[0067] In this embodiment, the operating drive current is the parameter type that has the greatest impact on parameter stability.
[0068] The beneficial effect of the above technical solution is that by determining the performance evaluation index of the organic electroluminescent device, the device performance of the target organic electroluminescent device can be determined more intuitively and accurately, thereby optimizing the device parameters more accurately and improving the device life.
[0069] Embodiment 7: Based on Example 5, a device optimization strategy for a target organic electroluminescent device is determined based on the performance evaluation index, thereby improving the device life, including: Step 41: comparing the performance evaluation index of the target organic electroluminescent device with a preset evaluation strategy database, thereby extracting a first device optimization strategy corresponding to the performance evaluation index; Step 42: combining the initial device parameters of the target organic electroluminescent device with the first device optimization strategy, thereby optimizing the device parameters and improving the life of the target organic electroluminescent device.
[0070] In this embodiment, the first device optimization strategy is to compare the performance evaluation index of the target organic electroluminescent device with a preset evaluation strategy database to determine the device optimization strategy corresponding to the performance evaluation index, wherein the first device optimization strategy includes: adjusting the pass current, adjusting the pass voltage, adjusting the operating temperature, adjusting the stability of the input current, etc.
[0071] The beneficial effect of the above technical solution is that by comparing the performance evaluation index with the preset evaluation strategy database, the device parameters of the target organic electroluminescent device can be adjusted more accurately, thereby improving the device life.
[0072] Embodiment 8: Based on Example 7, after device parameter optimization is performed, the method further includes: testing the parameter optimization results, specifically including: Step 01: Obtaining the second initial device parameters of the target organic electroluminescent device after device parameter optimization; Step 02: determining a second performance evaluation index based on the second initial device parameter, and comparing the second performance evaluation index with the performance evaluation index; If the second performance evaluation index is greater than the performance evaluation index, the parameter optimization result is qualified; If the second performance evaluation index is not greater than the performance evaluation index, the device parameter optimization needs to be performed again.
[0073] In this embodiment, the second initial device parameters are initial device parameters of the target organic electroluminescent device after device parameter optimization is completed.
[0074] In this embodiment, the second performance evaluation index is a performance evaluation index of the target organic electroluminescent device determined based on the second initial device parameter.
[0075] The beneficial effect of the above technical solution is that by testing the device parameter optimization result of the organic electroluminescent device, the life of the organic electroluminescent device can be improved more timely.
[0076] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A method for increasing the life of an organic electroluminescent device, characterized in that: include: Step 1: obtaining initial device parameters of a target organic electroluminescent device, and comparing the initial device parameters with standard device parameters to obtain a first comparison result, thereby determining a first life basis of the target organic electroluminescent device; Step 2: acquiring real-time operating parameters and historical operating parameters of the target organic electroluminescent device, thereby obtaining an operating curve of each sub-operating parameter, thereby obtaining a first operating curve set; Step 3: determining the operating state of each first operating curve in the first operating curve set, thereby determining the parameter stability of the corresponding sub-operating parameter, thereby determining the second life basis of the target organic electroluminescent device, and combining the first life basis to obtain a performance evaluation index of the target organic electroluminescent device; Step 4: Determine a device optimization strategy for the target organic electroluminescent device based on the performance evaluation index, thereby improving the device lifespan.
2. A method for increasing the life of an organic electroluminescent device according to claim 1, characterized in that: Acquiring initial device parameters of a target organic electroluminescent device, and comparing the initial device parameters with standard device parameters to obtain a first comparison result, thereby determining a first life basis of the target organic electroluminescent device, including: Step 11: acquiring initial device parameters and an initial device image of the target organic electroluminescent device based on a preset sensor; Step 12: Performing an initial judgment on the appearance of the target organic electroluminescent device based on the initial device image; If the initial judgment result shows that the appearance is damaged, then the initial life of the target organic electroluminescent device is obtained based on the damage range; If the initial judgment result shows that there is no appearance damage, the initial life of the organic electroluminescent device is judged to be 0; Step 13: Perform a first comparison between the initial device parameters and the standard device parameters of the target organic electroluminescent device to obtain a first comparison result, thereby determining a first life span basis of the target organic electroluminescent device.
3. A method for improving the life of an organic electroluminescent device according to claim 2, characterized in that: The first basis for determining the life of the target organic electroluminescent device includes: Step 131: performing a first comparison between the initial device parameters and the standard device parameters of the target organic electroluminescent device to obtain a first parameter difference between the initial device parameters and each parameter in the standard device parameters; Step 132: extracting initial device parameters whose first parameter difference is greater than the preset parameter difference to obtain second device parameters; Step 133: comprehensively determining a first life basis of the target organic electroluminescent device based on a ratio of a second parameter value of the second device parameter to the first parameter value of the initial device parameter and a parameter value of the second device parameter.
4. A method for increasing the life of an organic electroluminescent device according to claim 2, characterized in that: Acquire the real-time operating parameters and historical operating parameters of the target organic electroluminescent device, thereby obtaining an operating curve of each sub-operating parameter, thereby obtaining a first operating curve set, including: Step 21: obtaining the real-time operating parameters of the target organic electroluminescent device and a set of historical operating parameters of the target organic electroluminescent device during its historical operation; Step 22: Sort the historical moments corresponding to each historical operating parameter in the historical operating parameter set to obtain an ordered first ordered operating parameter set; Step 23: classify the first set of operating parameters based on the parameter type corresponding to each sub-operating parameter in the first set of ordered operating parameters to obtain a second set of ordered operating parameters; Step 24: inputting the operating parameters of each second ordered operating parameter subset in the second ordered operating parameter set into the same coordinate system to obtain a second operating curve of the current second ordered operating parameter subset; Step 25: Obtain a first operating curve set of the target organic electroluminescent device based on each second operating curve.
5. A method for increasing the life of an organic electroluminescent device according to claim 4, characterized in that: The performance evaluation index of the target organic electroluminescent device is obtained, including: Step 31: determining a curve reference value corresponding to the second operation curve based on a curve peak value and a curve valley value of each second operation curve in the first operation curve set; Step 32: Compare the deviation degree of the data point of each operating parameter in the second operating curve with the curve reference value, so as to determine the comprehensive deviation degree of each second operating curve; Step 33: determining the first parameter stability of the target organic electroluminescent device based on the comprehensive deviation degree of each second operating curve; Step 34: Acquire the real-time environmental parameters of the target organic electroluminescent device and the historical environmental parameters during the historical working process; Step 35: Compare the historical environment parameter with the real-time environment parameter, so as to determine the historical environment parameter at the historical moment with the highest degree of consistency with the real-time environment parameter as the first environment parameter; Step 36: Classify each sub-environment parameter in the historical environment parameter based on the parameter type to obtain a first classified environment parameter set; Step 37: Compare each classified environment parameter subset in the first classified environment parameter set, thereby extracting the median of each classified parameter subset as the first historical sub-parameter of the current parameter type; Step 38: combining each first historical sub-parameter in the first classification environmental parameter set to obtain a second environmental parameter of the target organic electroluminescent device; Step 39: extracting the historical device parameters corresponding to the first environmental parameters as the first historical device parameters, and predicting the historical device parameters corresponding to the second environmental parameters based on the historical device parameters corresponding to each historical environmental parameter to obtain the second historical device parameters; Step 310: obtaining a second parameter stability of the target organic electroluminescent device based on a first device parameter difference between the first historical device parameter and the initial device parameter and a second device parameter difference between the second historical device parameter and the initial device parameter; Step 311: combining the first parameter stability with the second parameter stability to obtain a second life basis of the target organic electroluminescent device, thereby determining a performance evaluation index of the target organic electroluminescent device in combination with the first life basis.
6. A method for increasing the life of an organic electroluminescent device according to claim 5, characterized in that: Get performance evaluation indexes, including: Get the performance evaluation index S; ; Wherein, S is the performance evaluation index of the target organic electroluminescent device, is the number of the second device parameters, is the i-th initial device parameter of the target organic electroluminescent device, is the standard device parameter corresponding to the i-th initial device parameter of the target organic electroluminescent device, is the characteristic conversion coefficient, is the real-time temperature of the target organic electroluminescent device, is the temperature conversion coefficient, is the operating driving current of the target organic electroluminescent device at the jth measurement moment, is the operating driving current of the target organic electroluminescent device at the j-1th measurement moment, is the operating driving current of the target organic electroluminescent device at the j+1th measurement moment, is the current conversion coefficient, The performance evaluation influence weights of the initial device parameters, The performance evaluation impact weight of real-time temperature, is the performance evaluation influence weight of the driving current, n is the number of initial device parameters, m is the number of measurement moments of the target organic electroluminescent device in the current measurement cycle, The first lifespan basis for the target organic electroluminescent device, It is a second lifespan basis of the target organic electroluminescent device.
7. The method for increasing the life of an organic electroluminescent device according to claim 5, characterized in that: Determine the device optimization strategy of the target organic electroluminescent device based on the performance evaluation index to improve the device life, including: Step 41: comparing the performance evaluation index of the target organic electroluminescent device with a preset evaluation strategy database, thereby extracting a first device optimization strategy corresponding to the performance evaluation index; Step 42: combining the initial device parameters of the target organic electroluminescent device with the first device optimization strategy, thereby optimizing the device parameters and improving the life of the target organic electroluminescent device.
8. The method for increasing the life of an organic electroluminescent device according to claim 7, characterized in that: After device parameter optimization, the process also includes: testing the parameter optimization results, including: Step 01: Obtaining the second initial device parameters of the target organic electroluminescent device after device parameter optimization; Step 02: determining a second performance evaluation index based on the second initial device parameter, and comparing the second performance evaluation index with the performance evaluation index; If the second performance evaluation index is greater than the performance evaluation index, the parameter optimization result is qualified; If the second performance evaluation index is not greater than the performance evaluation index, the device parameter optimization needs to be performed again.