A method for measuring luminous efficiency of organic electroluminescent device

Abstract

The present invention provides a method for measuring the luminous efficiency of an organic electroluminescent device, which relates to the technical field of luminous efficiency detection, and includes: obtaining an initial spectrum image of a target organic electroluminescent device in a current luminous cycle, performing image processing, and obtaining a first spectrum image, thereby determining a first brightness and a first luminous flux of the target organic electroluminescent device; obtaining a real-time power supply parameter of the target organic electroluminescent device based on preset software, and obtaining a first power supply parameter; determining a first current efficiency of the organic electroluminescent device based on the first brightness and the first power supply parameter of the organic electroluminescent device, and determining a first optical power efficiency at the same time; establishing an initial efficiency model based on the standard luminous efficiency of the organic electroluminescent device, and performing model optimization, and inputting the first current efficiency and the first optical power efficiency into the optimized efficiency model to obtain a comprehensive luminous efficiency. By combining current efficiency and optical power efficiency, the luminous efficiency measurement can be made more accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of luminous efficiency detection, and in particular to a method for measuring the luminous efficiency of an organic electroluminescent device. Background Art

[0002] At present, organic electroluminescent devices have broad application prospects in the fields of display and lighting due to their self-luminescence, high contrast, wide viewing angle, and fast response.

[0003] However, the luminous efficiency of organic electroluminescent devices is one of the key indicators for their performance evaluation, which is directly related to the energy consumption and light efficiency of the device. In the prior art, the measurement of the luminous efficiency of organic electroluminescent devices usually involves complex photoelectric conversion and data processing processes, and there is a problem of low measurement accuracy.

[0004] Therefore, the present invention provides a method for measuring the luminous efficiency of an organic electroluminescent device. Summary of the invention

[0005] The invention provides a method for measuring the luminous efficiency of an organic electroluminescent device, which is used to solve the problems of inaccurate luminous efficiency measurement and single measurement method in the prior art.

[0006] The present invention provides a method for measuring the luminous efficiency of an organic electroluminescent device, comprising:

[0007] Step 1: obtaining an initial spectrum image of the target organic electroluminescent device in the current light-emitting period based on a preset device, performing image processing on the initial spectrum image to obtain a first spectrum image, and analyzing and determining a first brightness and a first luminous flux of the target organic electroluminescent device in the current light-emitting period;

[0008] Step 2: acquiring the real-time power supply parameter of the target organic electroluminescent device based on the preset software, and performing parameter processing to obtain the first power supply parameter;

[0009] Step 3: determining a first current efficiency of the target organic electroluminescent device based on a first brightness and a first power supply parameter of the target organic electroluminescent device, and at the same time, determining a first optical power efficiency of the target organic electroluminescent device based on a first luminous flux and a first power supply parameter of the target organic electroluminescent device;

[0010] Step 4: Establish an initial efficiency model based on the standard luminous efficiency of the target organic electroluminescent device, and optimize the model. Input the first current efficiency and the first light power efficiency into the optimized efficiency model to obtain the comprehensive luminous efficiency.

[0011] According to the present invention, the analysis and determination of the first brightness and the first luminous flux of the target organic electroluminescent device in the current light-emitting period includes:

[0012] Step 11: acquiring an initial spectrum image of the target organic electroluminescent device at each moment of the current light-emitting cycle based on a preset device;

[0013] Step 12: Compare the initial spectral images at adjacent moments, so as to determine the two initial spectral images with the smallest change in the initial spectral images at adjacent moments as the first spectral image and the second spectral image;

[0014] Step 13: performing image analysis on the first spectrum image and the second spectrum image, thereby comprehensively determining the first brightness and the first luminous flux of the target organic electroluminescent device in the current light-emitting period based on the analysis results.

[0015] According to the present invention, the method for comprehensively determining the first brightness and the first luminous flux of the target organic electroluminescent device in the current light-emitting period includes:

[0016] Step 131: filtering the first spectral image and the second spectral image to obtain a first optimized spectral image and a second optimized spectral image;

[0017] Step 132: performing a first analysis on the first optimized spectrum image to obtain a first initial brightness and a first initial luminous flux, and performing a second analysis on the second optimized spectrum image to obtain a second initial brightness and a second initial luminous flux;

[0018] Step 133: determining a first brightness of the target organic electroluminescent device based on a brightness average of the first initial brightness and the second initial brightness, and obtaining a first luminous flux of the target organic electroluminescent device based on an average of the first initial luminous flux and the second initial luminous flux.

[0019] According to the present invention, the real-time power supply parameter of the target organic electroluminescent device is obtained based on the preset software, and the parameter is processed to obtain the first power supply parameter, including:

[0020] Step 21: obtaining the real-time power supply parameters of the target organic electroluminescent device at each moment in the current light-emitting cycle based on the preset software to obtain a real-time power supply parameter set;

[0021] Step 22: comparing the parameter similarity of the real-time power supply parameters at each adjacent moment in the real-time power supply parameter set, and extracting the first real-time power supply parameter and the second real-time power supply parameter with the highest similarity;

[0022] Step 23: performing a first comparison between the first real-time power supply parameter and the standard power supply parameter to obtain a first power supply parameter difference of each power supply parameter, and performing a second comparison between the second real-time power supply parameter and the standard power supply parameter to obtain a second power supply parameter difference of each power supply parameter;

[0023] Step 24: comparing the first power supply parameter difference and the second power supply parameter difference, thereby extracting the first real-time power supply parameter or the second real-time power supply parameter with the smaller parameter difference as the initial power supply parameter;

[0024] Step 25: Perform parameter standardization processing on the initial power supply parameters to obtain first power supply parameters.

[0025] According to the present invention, a first current efficiency of a target organic electroluminescent device is determined based on a first brightness and a first power supply parameter of the target organic electroluminescent device, and a first optical power efficiency of the target organic electroluminescent device is determined based on a first luminous flux and a first power supply parameter of the target organic electroluminescent device, including:

[0026] Step 31: extracting a power supply parameter related to current efficiency from the first power supply parameter to obtain a second power supply parameter, and at the same time extracting a power supply parameter related to optical power efficiency from the first power supply parameter to obtain a third power supply parameter;

[0027] Step 32: Obtaining an initial current efficiency based on a ratio of the first brightness and the second power supply parameter;

[0028] Step 33: obtaining the real-time power supply parameters at the moment corresponding to the first brightness, and extracting the power supply parameters related to the current efficiency as reference power supply parameters;

[0029] Step 34: Obtaining a reference current efficiency based on a ratio of the first brightness and a reference power supply parameter;

[0030] Step 35: Compare the initial current efficiency with the reference current efficiency;

[0031] If the efficiency difference between the initial current efficiency and the reference current efficiency is less than the preset efficiency difference, the initial current efficiency is used as the first current efficiency of the target organic electroluminescent device;

[0032] Otherwise, it is necessary to redetermine the first power supply parameter;

[0033] Step 36: Obtaining an initial optical power efficiency based on a ratio of the first luminous flux of the target organic electroluminescent device to the third power supply parameter;

[0034] Step 37: Obtain the external environment brightness of the target organic electroluminescent device in the current light-emitting period, and determine the real-time environmental impact index of the target organic electroluminescent device in combination with the historical environmental impact index of the historical external environment on the luminous flux;

[0035] Step 38: extracting a corresponding efficiency deviation from a preset impact-deviation database based on the real-time environmental impact index to obtain a first efficiency deviation;

[0036] Step 39: The initial light power efficiency and the first efficiency deviation are combined to obtain the first light power efficiency of the target organic electroluminescent device.

[0037] The historical environmental impact index of the historical external environment on the luminous flux provided by the present invention includes:

[0038] Calculate the historical environmental impact index S of the historical external environment of the target organic electroluminescent device on the luminous flux;

[0039] ; Wherein, S is the historical environmental impact index of the historical external environment of the target organic electroluminescent device on the luminous flux; is the ambient brightness of the i-th historical external environment of the target organic electroluminescent device; is the historical luminous flux of the target organic electroluminescent device under the i-th historical external environment; is the standard luminous flux of the target organic electroluminescent device under the i-th historical external environment; is the input electric power of the target organic electroluminescent device under the i-th historical external environment; Ambient brightness conversion coefficient; n is the number of times the historical external environment has had a historical impact on the luminous flux, and e is the base of the natural logarithm.

[0040] According to the present invention, the first current efficiency and the first light power efficiency are input into the optimized efficiency model to obtain the comprehensive luminous efficiency, including:

[0041] Step 41: constructing an initial efficiency model based on the standard luminous efficiency of the target organic electroluminescent device in the current luminous cycle;

[0042] Step 42: Obtaining the historical luminous efficiency of the target organic electroluminescent device based on the historical current efficiency and the corresponding historical light power efficiency of the target organic electroluminescent device;

[0043] Step 43: input each historical luminous efficiency into the initial efficiency model, thereby optimizing the model parameters of the initial efficiency model to obtain a first efficiency model;

[0044] Step 44: Input the first current efficiency and the first light power efficiency into the first efficiency model to obtain the comprehensive luminous efficiency of the target organic electroluminescent device.

[0045] According to the present invention, the model parameters of the initial efficiency model are optimized to obtain a first efficiency model, including:

[0046] Compare the environmental similarity between the historical external environment corresponding to each historical luminous efficiency and the real-time external environment;

[0047] Based on the degree of environmental similarity, the model parameters of the initial efficiency model are weighted optimized to obtain a first efficiency model, wherein the higher the environmental similarity, the greater the weight of the weighted optimization.

[0048] Compared with the prior art, the beneficial effects of the present invention are as follows: a method for measuring the luminous efficiency of an organic electroluminescent device provided by the present invention determines the brightness and luminous flux by analyzing the spectral image of the organic electroluminescent device, and obtains the current efficiency and optical power efficiency of the target organic electroluminescent device in combination with the real-time power supply parameters, and inputs them into the efficiency model to obtain the comprehensive luminous efficiency after efficiency processing based on the corresponding model parameters, which can make the measurement of the luminous efficiency of the organic electroluminescent device more comprehensive and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] 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.

[0050] Figure 1 The present invention provides a flow chart of a method for measuring the luminous efficiency of an organic electroluminescent device. DETAILED DESCRIPTION

[0051] 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.

[0052] Embodiment 1:

[0053] The embodiment of the present invention provides a method for measuring the luminous efficiency of an organic electroluminescent device, such as Figure 1 As shown, including:

[0054] Step 1: obtaining an initial spectrum image of the target organic electroluminescent device in the current light-emitting period based on a preset device, performing image processing on the initial spectrum image to obtain a first spectrum image, and analyzing and determining a first brightness and a first luminous flux of the target organic electroluminescent device in the current light-emitting period;

[0055] Step 2: acquiring the real-time power supply parameter of the target organic electroluminescent device based on the preset software, and performing parameter processing to obtain the first power supply parameter;

[0056] Step 3: determining a first current efficiency of the target organic electroluminescent device based on a first brightness and a first power supply parameter of the target organic electroluminescent device, and at the same time, determining a first optical power efficiency of the target organic electroluminescent device based on a first luminous flux and a first power supply parameter of the target organic electroluminescent device;

[0057] Step 4: Establish an initial efficiency model based on the standard luminous efficiency of the target organic electroluminescent device, and optimize the model. Input the first current efficiency and the first light power efficiency into the optimized efficiency model to obtain the comprehensive luminous efficiency.

[0058] In this embodiment, the initial spectral image refers to a light-emitting image of the target organic electroluminescent device at each moment of the current light-emitting cycle acquired based on a preset image acquisition device.

[0059] In this embodiment, the first spectral image is obtained by performing image filtering processing on the initial spectral image.

[0060] In this embodiment, the first brightness and the first luminous flux are obtained after performing image analysis on the first spectrum image.

[0061] In this embodiment, the real-time power supply parameters include current, voltage, current density, input power, resistance value of the organic electroluminescent device and other parameters.

[0062] In this embodiment, the first power supply parameter is a power supply parameter obtained by standardizing the real-time power supply parameter.

[0063] In this embodiment, the first current efficiency is determined by the ratio of the first brightness to the power supply parameter related to the current efficiency in the first power supply parameter, and the first light power efficiency is determined by the ratio of the first luminous flux to the power supply parameter related to the light power efficiency in the first power supply parameter.

[0064] In this embodiment, the standard luminous efficiency refers to the standard luminous efficiency of the organic electroluminescent device in the current luminous cycle and the real-time device state.

[0065] In this embodiment, the initial efficiency model is determined based on the standard luminous efficiency and the device parameters of the target organic light-emitting device.

[0066] In this embodiment, the comprehensive luminous efficiency refers to combining the first current efficiency and the first light power efficiency and inputting them into the optimization model of the initial efficiency model to obtain the luminous efficiency of the target organic electroluminescent device.

[0067] The beneficial effect of the above technical solution is: by analyzing the spectral image of the organic electroluminescent device, the brightness and luminous flux are determined, and the current efficiency and light power efficiency of the target organic electroluminescent device are obtained in combination with the real-time power supply parameters, and the comprehensive luminous efficiency is obtained after inputting the efficiency into the efficiency model and performing efficiency processing based on the corresponding model parameters, which can make the measurement of the luminous efficiency of the organic electroluminescent device more comprehensive and accurate.

[0068] Embodiment 2:

[0069] Based on Example 1, analyzing and determining the first brightness and the first luminous flux of the target organic electroluminescent device in the current light-emitting period includes:

[0070] Step 11: acquiring an initial spectrum image of the target organic electroluminescent device at each moment of the current light-emitting cycle based on a preset device;

[0071] Step 12: Compare the initial spectral images at adjacent moments, so as to determine the two initial spectral images with the smallest change in the initial spectral images at adjacent moments as the first spectral image and the second spectral image;

[0072] Step 13: performing image analysis on the first spectrum image and the second spectrum image, thereby comprehensively determining the first brightness and the first luminous flux of the target organic electroluminescent device in the current light-emitting period based on the analysis results.

[0073] In this embodiment, the initial spectral image refers to a light-emitting image of the target organic electroluminescent device at each moment of the current light-emitting cycle acquired based on a preset image acquisition device.

[0074] In this embodiment, the first spectral image and the second spectral image are obtained by comparing the initial spectral images at each adjacent moment in the current light-emitting cycle, thereby extracting adjacent spectral images with the smallest image change.

[0075] In this embodiment, the first brightness is the light emitting brightness of the organic electroluminescent device in the current light emitting period determined by performing image analysis on the first spectrum image and the second spectrum image.

[0076] In this embodiment, the first luminous flux is the luminous flux of the organic electroluminescent device in the current light-emitting period determined by performing image analysis on the first spectral image and the second spectral image.

[0077] The beneficial effect of the above technical solution is that by comparing the spectral images at adjacent moments, the first luminous flux and the first brightness of the organic electroluminescent device can be determined, so that the determined luminous flux and the first brightness can be made more accurate, thereby obtaining a more accurate luminous efficiency.

[0078] Embodiment 3:

[0079] Based on Example 2, image analysis is performed on the first spectrum image and the second spectrum image, so as to comprehensively determine the first brightness and the first luminous flux of the target organic electroluminescent device in the current light-emitting period based on the analysis results, including:

[0080] Step 131: filtering the first spectral image and the second spectral image to obtain a first optimized spectral image and a second optimized spectral image;

[0081] Step 132: performing a first analysis on the first optimized spectrum image to obtain a first initial brightness and a first initial luminous flux, and performing a second analysis on the second optimized spectrum image to obtain a second initial brightness and a second initial luminous flux;

[0082] Step 133: determining a first brightness of the target organic electroluminescent device based on a brightness average of the first initial brightness and the second initial brightness, and obtaining a first luminous flux of the target organic electroluminescent device based on an average of the first initial luminous flux and the second initial luminous flux.

[0083] In this embodiment, the first optimized spectrum image is obtained by filtering the first spectrum image, and the second optimized spectrum image is obtained by filtering the second spectrum image.

[0084] In this embodiment, the first initial brightness and the first initial luminous flux are obtained after extracting and analyzing the image information of the first optimized spectrum image; the second initial brightness and the second initial luminous flux are obtained after extracting and analyzing the second optimized spectrum image.

[0085] In this embodiment, the first brightness is a brightness average value obtained by comparing a brightness value of the first initial brightness with a brightness value of the second initial brightness.

[0086] In this embodiment, the first luminous flux is an average luminous flux obtained by comparing the first initial luminous flux and the second initial luminous flux.

[0087] The beneficial effect of the above technical solution is that by comparing the spectral images at adjacent moments, the first luminous flux and the first brightness of the organic electroluminescent device can be determined, so that the determined luminous flux and the first brightness can be made more accurate, thereby obtaining a more accurate luminous efficiency.

[0088] Embodiment 4:

[0089] Based on Example 2, the real-time power supply parameters of the target organic electroluminescent device are obtained based on the preset software, and the parameters are processed to obtain the first power supply parameters, including:

[0090] Step 21: obtaining the real-time power supply parameters of the target organic electroluminescent device at each moment in the current light-emitting cycle based on the preset software to obtain a real-time power supply parameter set;

[0091] Step 22: comparing the parameter similarity of the real-time power supply parameters at each adjacent moment in the real-time power supply parameter set, and extracting the first real-time power supply parameter and the second real-time power supply parameter with the highest similarity;

[0092] Step 23: performing a first comparison between the first real-time power supply parameter and the standard power supply parameter to obtain a first power supply parameter difference of each power supply parameter, and performing a second comparison between the second real-time power supply parameter and the standard power supply parameter to obtain a second power supply parameter difference of each power supply parameter;

[0093] Step 24: comparing the first power supply parameter difference and the second power supply parameter difference, thereby extracting the first real-time power supply parameter or the second real-time power supply parameter with the smaller parameter difference as the initial power supply parameter;

[0094] Step 25: Perform parameter standardization processing on the initial power supply parameters to obtain first power supply parameters.

[0095] In this embodiment, the real-time power supply parameters include current, voltage, current density, input power, resistance value of the organic electroluminescent device and other parameters.

[0096] In this embodiment, the real-time power supply parameter set is a set of real-time power supply parameters at each moment in the current light-emitting cycle.

[0097] In this embodiment, parameter similarity refers to the degree of parameter similarity between power supply parameters at adjacent moments, wherein the higher the parameter similarity, the more stable the current at the corresponding moment.

[0098] In this embodiment, the first real-time power supply parameter and the second real-time power supply parameter are power supply parameters at adjacent moments with the highest parameter similarity extracted from the real-time power supply parameters according to parameter similarity.

[0099] In this embodiment, the first comparison is to compare the first real-time power supply parameter with each corresponding sub-parameter in the standard power supply parameter one by one, and obtain the first power supply parameter difference based on the first comparison result, and the second comparison is to compare the second real-time power supply parameter with each corresponding sub-parameter in the standard power supply parameter one by one, and obtain the second power supply parameter difference based on the second comparison result.

[0100] In this embodiment, the initial power supply parameter is determined based on the real-time power supply parameter with the smaller parameter difference between the first power supply parameter difference of the first comparison result and the second power supply parameter difference of the second comparison result. For example, the comprehensive parameter difference corresponding to the first power supply parameter difference in the first comparison result is 1, and the comprehensive parameter difference corresponding to the second power supply parameter difference in the second comparison result is 1.2, then the first real-time power supply parameter corresponding to the first comparison result is used as the initial power supply parameter.

[0101] In this embodiment, the first power supply parameter is a power supply parameter obtained by standardizing the initial power supply parameter.

[0102] The beneficial effect of the above technical solution is that by obtaining the power supply parameters of the target organic electroluminescent device, more accurate current efficiency and light power efficiency can be determined in combination with luminous flux and brightness, thereby making the measurement of luminous efficiency more accurate.

[0103] Embodiment 5:

[0104] Based on Example 4, a first current efficiency of the target organic electroluminescent device is determined based on a first brightness and a first power supply parameter of the target organic electroluminescent device, and a first optical power efficiency of the target organic electroluminescent device is determined based on a first luminous flux and a first power supply parameter of the target organic electroluminescent device, including:

[0105] Step 31: extracting a power supply parameter related to current efficiency from the first power supply parameter to obtain a second power supply parameter, and at the same time extracting a power supply parameter related to optical power efficiency from the first power supply parameter to obtain a third power supply parameter;

[0106] Step 32: Obtaining an initial current efficiency based on a ratio of the first brightness and the second power supply parameter;

[0107] Step 33: obtaining the real-time power supply parameters at the moment corresponding to the first brightness, and extracting the power supply parameters related to the current efficiency as reference power supply parameters;

[0108] Step 34: Obtaining a reference current efficiency based on a ratio of the first brightness and a reference power supply parameter;

[0109] Step 35: Compare the initial current efficiency with the reference current efficiency;

[0110] If the efficiency difference between the initial current efficiency and the reference current efficiency is less than the preset efficiency difference, the initial current efficiency is used as the first current efficiency of the target organic electroluminescent device;

[0111] Otherwise, it is necessary to redetermine the first power supply parameter;

[0112] Step 36: Obtaining an initial optical power efficiency based on a ratio of the first luminous flux of the target organic electroluminescent device to the third power supply parameter;

[0113] Step 37: Obtain the external environment brightness of the target organic electroluminescent device in the current light-emitting period, and determine the real-time environmental impact index of the target organic electroluminescent device in combination with the historical environmental impact index of the historical external environment on the luminous flux;

[0114] Step 38: extracting a corresponding efficiency deviation from a preset impact-deviation database based on the real-time environmental impact index to obtain a first efficiency deviation;

[0115] Step 39: The initial light power efficiency and the first efficiency deviation are combined to obtain the first light power efficiency of the target organic electroluminescent device.

[0116] In this embodiment, the power supply parameter related to the current efficiency is extracted from the first power supply parameter to obtain the second power supply parameter, and the power supply parameter related to the optical power efficiency is extracted from the first power supply parameter to obtain the third power supply parameter. For example, the current density is related to the current efficiency, and the input electric power is related to the optical power efficiency.

[0117] In this embodiment, the initial current efficiency is obtained by performing parameter conversion on the first brightness and the second power supply parameter to determine the ratio.

[0118] In this embodiment, the reference power supply parameter refers to a power supply parameter related to current efficiency extracted from the real-time power supply parameters at the moment corresponding to the first brightness.

[0119] In this embodiment, the reference current efficiency is obtained by performing parameter conversion on the first brightness and the reference power supply parameter to determine a ratio.

[0120] In this embodiment, the first current efficiency is when the efficiency difference between the initial current efficiency and the reference current efficiency is less than a preset efficiency difference, then the initial current efficiency is used as the first current efficiency of the target organic electroluminescent device, wherein the preset efficiency difference has a value range of [0.01, 0.10].

[0121] In this embodiment, the initial optical power efficiency is obtained based on the ratio of the first luminous flux of the target organic electroluminescent device to the third power supply parameter.

[0122] In this embodiment, the environmental impact index refers to the impact index of the external environment brightness on the optical power efficiency.

[0123] In this embodiment, the first efficiency deviation is obtained by extracting the corresponding efficiency deviation from a preset impact-deviation database based on the real-time environmental impact index.

[0124] In this embodiment, the first optical power efficiency is obtained by combining the initial optical power efficiency and the first efficiency deviation.

[0125] The beneficial effect of the above technical solution is: by determining the historical environmental impact index, the real-time environmental impact index of the target organic electroluminescent device is determined, thereby optimizing the initial light power efficiency, obtaining the first light power efficiency, and combining it with the first current efficiency to make the measurement of the luminous efficiency of the target organic electroluminescent device more accurate and effective.

[0126] Embodiment 6:

[0127] Based on Example 5, the historical environmental impact index of the historical external environment on the luminous flux includes:

[0128] Calculate the historical environmental impact index S of the historical external environment of the target organic electroluminescent device on the luminous flux;

[0129] ; Wherein, S is the historical environmental impact index of the historical external environment of the target organic electroluminescent device on the luminous flux; is the ambient brightness of the i-th historical external environment of the target organic electroluminescent device; is the historical luminous flux of the target organic electroluminescent device under the i-th historical external environment; is the standard luminous flux of the target organic electroluminescent device under the i-th historical external environment; is the input electric power of the target organic electroluminescent device under the i-th historical external environment; Ambient brightness conversion coefficient; n is the number of times the historical external environment has had a historical impact on the luminous flux, and e is the base of the natural logarithm.

[0130] In this embodiment, the first power supply parameter includes input electrical power.

[0131] The beneficial effect of the above technical solution is: by determining the historical environmental impact index, the real-time environmental impact index of the target organic electroluminescent device is determined, thereby optimizing the initial light power efficiency, making the measurement of the luminous efficiency more accurate and effective.

[0132] Embodiment 7:

[0133] Based on Example 5, an initial efficiency model is established based on the standard luminous efficiency of the organic electroluminescent device, and the model is optimized. The first current efficiency and the first light power efficiency are input into the optimized efficiency model to obtain the comprehensive luminous efficiency, including:

[0134] Step 41: constructing an initial efficiency model based on the standard luminous efficiency of the target organic electroluminescent device in the current luminous cycle;

[0135] Step 42: Obtaining the historical luminous efficiency of the target organic electroluminescent device based on the historical current efficiency and the corresponding historical light power efficiency of the target organic electroluminescent device;

[0136] Step 43: input each historical luminous efficiency into the initial efficiency model, thereby optimizing the model parameters of the initial efficiency model to obtain a first efficiency model;

[0137] Step 44: Input the first current efficiency and the first light power efficiency into the first efficiency model to obtain the comprehensive luminous efficiency of the target organic electroluminescent device.

[0138] In this embodiment, the standard luminous efficiency refers to the standard luminous efficiency of the target organic electroluminescent device in the current luminous cycle.

[0139] In this embodiment, the historical luminous efficiency includes the historical current efficiency and the corresponding historical light power efficiency.

[0140] In this embodiment, the first efficiency model is a luminous efficiency model obtained by optimizing parameters of the initial efficiency model according to each historical luminous efficiency.

[0141] In this embodiment, the comprehensive luminous efficiency is obtained by combining the first current efficiency and the first light power efficiency and inputting them into the first efficiency model, thereby obtaining the luminous efficiency of the target organic electroluminescent device.

[0142] The beneficial effect of the above technical solution is that by optimizing the initial efficiency model in combination with the historical luminous efficiency, the efficiency model can be made more accurate, thereby being able to more accurately determine the real-time luminous efficiency of the organic electroluminescent device.

[0143] Embodiment 8:

[0144] Based on Example 7, the model parameters of the initial efficiency model are optimized to obtain a first efficiency model, including:

[0145] Compare the environmental similarity between the historical external environment corresponding to each historical luminous efficiency and the real-time external environment;

[0146] Based on the degree of environmental similarity, the model parameters of the initial efficiency model are weighted optimized to obtain a first efficiency model, wherein the higher the environmental similarity, the greater the weight of the weighted optimization.

[0147] In this embodiment, each historical external environment is compared with the real-time external environment to determine the environmental similarity between each historical external environment and the real-time external environment. For example, the environmental similarities between the a1, a2, and a3 historical external environments and the real-time external environment are (0.67, 0.65, and 0.70). The environmental similarities are sorted from high to low as a3, a1, and a2. The corresponding weights are sorted from high to low as a3 corresponding weight, a1 corresponding weight, and a2 corresponding weight.

[0148] The beneficial effect of the above technical solution is that by optimizing the initial efficiency model in combination with the historical luminous efficiency, the efficiency model can be made more accurate, thereby being able to more accurately determine the real-time luminous efficiency of the organic electroluminescent device.

[0149] 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 measuring the luminous efficiency of an organic electroluminescent device, characterized in that: include: Step 1: obtaining an initial spectrum image of the target organic electroluminescent device in the current light-emitting period based on a preset device, performing image processing on the initial spectrum image to obtain a first spectrum image, and analyzing and determining a first brightness and a first luminous flux of the target organic electroluminescent device in the current light-emitting period; Step 2: acquiring the real-time power supply parameter of the target organic electroluminescent device based on the preset software, and performing parameter processing to obtain the first power supply parameter; Step 3: determining a first current efficiency of the target organic electroluminescent device based on a first brightness of the target organic electroluminescent device and a power supply parameter related to current efficiency in the first power supply parameter, and at the same time, determining a first optical power efficiency of the target organic electroluminescent device based on a first luminous flux of the target organic electroluminescent device and a power supply parameter related to optical power in the first power supply parameter; Step 4: establishing an initial efficiency model based on the standard luminous efficiency of the target organic electroluminescent device, and optimizing the model, inputting the first current efficiency and the first light power efficiency into the optimized efficiency model to obtain the comprehensive luminous efficiency; Among them, an initial efficiency model is established based on the standard luminous efficiency of the target organic electroluminescent device, and the model is optimized, and the first current efficiency and the first light power efficiency are input into the optimized efficiency model to obtain the comprehensive luminous efficiency, including: Step 41: constructing an initial efficiency model based on the standard luminous efficiency of the target organic electroluminescent device in the current luminous cycle; Step 42: Obtaining the historical luminous efficiency of the target organic electroluminescent device based on the historical current efficiency and the corresponding historical light power efficiency of the target organic electroluminescent device; Step 43: input each historical luminous efficiency into the initial efficiency model, thereby optimizing the model parameters of the initial efficiency model to obtain a first efficiency model; Step 44: inputting the first current efficiency and the first light power efficiency into a first efficiency model to obtain a comprehensive luminous efficiency of the target organic electroluminescent device; The model parameters of the initial efficiency model are optimized to obtain the first efficiency model, including: Compare the environmental similarity between the historical external environment corresponding to each historical luminous efficiency and the real-time external environment; Based on the degree of environmental similarity, the model parameters of the initial efficiency model are weighted optimized to obtain a first efficiency model, wherein the higher the environmental similarity, the greater the weight of the weighted optimization.

2. The method for measuring the luminous efficiency of an organic electroluminescent device according to claim 1, characterized in that: Based on a preset device, an initial spectrum image of a target organic electroluminescent device in a current light-emitting period is acquired, and image processing is performed on the initial spectrum image to obtain a first spectrum image, and a first brightness and a first luminous flux of the target organic electroluminescent device in the current light-emitting period are analyzed and determined, including: Step 11: acquiring an initial spectrum image of the target organic electroluminescent device at each moment of the current light-emitting cycle based on a preset device; Step 12: Compare the initial spectral images at adjacent moments, so as to determine the two initial spectral images with the smallest change in the initial spectral images at adjacent moments as the first spectral image and the second spectral image; Step 13: performing image analysis on the first spectrum image and the second spectrum image, thereby comprehensively determining the first brightness and the first luminous flux of the target organic electroluminescent device in the current light-emitting period based on the analysis results.

3. The method for measuring the luminous efficiency of an organic electroluminescent device according to claim 2, characterized in that: Performing image analysis on the first spectrum image and the second spectrum image, thereby comprehensively determining a first brightness and a first luminous flux of the target organic electroluminescent device in a current light-emitting period based on the analysis results, including: Step 131: filtering the first spectral image and the second spectral image to obtain a first optimized spectral image and a second optimized spectral image; Step 132: performing a first analysis on the first optimized spectrum image to obtain a first initial brightness and a first initial luminous flux, and performing a second analysis on the second optimized spectrum image to obtain a second initial brightness and a second initial luminous flux; Step 133: determining a first brightness of the target organic electroluminescent device based on a brightness average of the first initial brightness and the second initial brightness, and obtaining a first luminous flux of the target organic electroluminescent device based on an average of the first initial luminous flux and the second initial luminous flux.

4. The method for measuring the luminous efficiency of an organic electroluminescent device according to claim 2, characterized in that: Acquiring the real-time power supply parameters of the target organic electroluminescent device based on the preset software and performing parameter processing to obtain the first power supply parameters includes: Step 21: obtaining the real-time power supply parameters of the target organic electroluminescent device at each moment in the current light-emitting cycle based on the preset software to obtain a real-time power supply parameter set; Step 22: comparing the parameter similarity of the real-time power supply parameters at each adjacent moment in the real-time power supply parameter set, and extracting the first real-time power supply parameter and the second real-time power supply parameter with the highest similarity; Step 23: performing a first comparison on the first real-time power supply parameter and the standard power supply parameter to obtain a first power supply parameter difference of each power supply parameter, and performing a second comparison on the second real-time power supply parameter and the standard power supply parameter to obtain a second power supply parameter difference of each power supply parameter; Step 24: comparing the first power supply parameter difference and the second power supply parameter difference, thereby extracting the first real-time power supply parameter or the second real-time power supply parameter with the smaller parameter difference as the initial power supply parameter; Step 25: Perform parameter standardization processing on the initial power supply parameters to obtain first power supply parameters.

5. The method for measuring the luminous efficiency of an organic electroluminescent device according to claim 4, characterized in that: Determining a first current efficiency of the target organic electroluminescent device based on a first brightness of the target organic electroluminescent device and a power supply parameter related to current efficiency in the first power supply parameter, and determining a first optical power efficiency of the target organic electroluminescent device based on a first luminous flux of the target organic electroluminescent device and a power supply parameter related to optical power in the first power supply parameter, including: Step 31: extracting a power supply parameter related to current efficiency from the first power supply parameter to obtain a second power supply parameter, and at the same time extracting a power supply parameter related to optical power efficiency from the first power supply parameter to obtain a third power supply parameter; Step 32: Obtaining an initial current efficiency based on a ratio of the first brightness and the second power supply parameter; Step 33: obtaining the real-time power supply parameters at the moment corresponding to the first brightness, and extracting the power supply parameters related to the current efficiency as reference power supply parameters; Step 34: Obtaining a reference current efficiency based on a ratio of the first brightness and a reference power supply parameter; Step 35: Compare the initial current efficiency with the reference current efficiency; If the efficiency difference between the initial current efficiency and the reference current efficiency is less than the preset efficiency difference, the initial current efficiency is used as the first current efficiency of the target organic electroluminescent device; Otherwise, it is necessary to redetermine the first power supply parameter; Step 36: Obtaining an initial optical power efficiency based on a ratio of the first luminous flux of the target organic electroluminescent device to the third power supply parameter; Step 37: Obtain the external environment brightness of the target organic electroluminescent device in the current light-emitting period, and determine the real-time environmental impact index of the target organic electroluminescent device in combination with the historical environmental impact index of the historical external environment on the luminous flux; Step 38: extracting a corresponding efficiency deviation from a preset impact-deviation database based on the real-time environmental impact index to obtain a first efficiency deviation; Step 39: The initial light power efficiency and the first efficiency deviation are combined to obtain the first light power efficiency of the target organic electroluminescent device.

6. The method for measuring the luminous efficiency of an organic electroluminescent device according to claim 5, characterized in that: The historical environmental impact index of the historical external environment on the light flux includes: Calculate the historical environmental impact index S of the historical external environment of the target organic electroluminescent device on the luminous flux; ; Wherein, S is the historical environmental impact index of the historical external environment of the target organic electroluminescent device on the luminous flux; is the ambient brightness of the i-th historical external environment of the target organic electroluminescent device; is the historical luminous flux of the target organic electroluminescent device under the i-th historical external environment; is the standard luminous flux of the target organic electroluminescent device under the i-th historical external environment; is the input electric power of the target organic electroluminescent device under the i-th historical external environment; Ambient brightness conversion coefficient; n is the number of times the historical external environment has had a historical impact on the luminous flux, and e is the base of the natural logarithm.

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