System for testing brightness of organic light-emitting device
By introducing a heat dissipation module into the brightness testing system of organic electroluminescent devices, the heat accumulation problem caused by the lack of a heat dissipation device in the prior art is solved, and the stability and device life during the test are improved.
Patent Information
- Application Number
- CN202411405622.2
- 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 existing brightness test devices of organic electroluminescent devices lack heat dissipation devices, which leads to an increase in heat during long-term operation that affects the working performance and life of the device.
A test system including a brightness adjustment module, a brightness detection module, a timer, a heat dissipation module, a storage module and a main control module is designed to dissipate heat from the organic electroluminescent device and a brightness detection module through the heat dissipation module to avoid heat accumulation.
It effectively avoids the performance degradation and shortening of life caused by heat increase in organic electroluminescent devices and brightness test modules, ensuring stability and reliability during the test process.
Smart Images
Figure CN119199464A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of brightness testing, in particular to a brightness testing system for an organic electroluminescent device. Background Art
[0002] An organic electroluminescent device is a self-luminous device. Its principle is as follows: holes injected from the positive electrode and electrons injected from the negative electrode are recombined by applying an external electric field, and the energy generated by the recombination is used to make the fluorescent substance emit light.
[0003] When an organic electroluminescent device is processed or in use, it is sometimes necessary to perform a brightness test on it. Existing brightness test devices for organic electroluminescent devices, such as a test system for brightness characteristics of an organic electroluminescent device in CN102768315A, have the following problems: Without a heat dissipation device, the organic electroluminescent device and the brightness test module may have their working performance and life affected due to the increase in heat when working for a long time. Summary of the invention
[0004] The present invention provides a system for testing the brightness of an organic electroluminescent device, which is used to solve the technical problems raised by the above-mentioned background technology.
[0005] In order to solve the above problems, the present invention discloses a system for testing the brightness of an organic electroluminescent device, comprising: A brightness adjustment module, used to adjust the brightness of the organic electroluminescent device, the brightness adjustment module is electrically connected to the organic electroluminescent device control module; A brightness detection module, comprising a plurality of brightness detection units, wherein the plurality of brightness detection units are used to detect the brightness at different light-emitting parts of the organic electroluminescent device; A timer, used to time the working time of the organic electroluminescent device; A heat dissipation module, used for dissipating heat from the organic electroluminescent device and the brightness detection module; A storage module for storing standard brightness information of the organic electroluminescent device under different brightness adjustment module test control parameters; The main control module is electrically connected to the organic electroluminescent device control module, the brightness detection module, the timer, the heat dissipation module, the storage module, the display module and the alarm module respectively.
[0006] Preferably, it also includes: A work surface, wherein a hollow seat is arranged on the work surface, the upper end of the hollow seat is open, a screw rod is rotatably arranged in the hollow seat, the screw rod extends horizontally along the left and right directions, a motor for driving the screw rod to rotate is arranged on one side of the hollow seat, a slider is slidably connected in the hollow seat along the left and right directions, and the slider is threadedly connected to the screw rod; The L-shaped plate is composed of a first vertical fixing plate and a horizontal plate integrally fixedly arranged at the left portion of the lower end thereof, the first vertical fixing plate and the horizontal plate are fixedly connected to the left portion of the upper end of the worktable, the right side of the first vertical fixing plate is used to install an organic electroluminescent device, and the light-emitting surface of the organic electroluminescent device faces the right side; A second vertical fixing plate is fixedly connected to the upper end of the slider, the left side of the second vertical fixing plate is used to install the brightness detection module, and the second vertical fixing plate is located on the right side of the first vertical fixing plate; A third vertical fixing plate is fixedly connected to the upper end of the work surface, the third vertical fixing plate is located at the rear side of the hollow seat, and the front side of the third vertical fixing plate is used to install a heat dissipation module, and the heat dissipation module is a heat dissipation fan; A distance sensor, used to detect the vertical distance between the right side of the second vertical fixing plate and the left side of the first vertical fixing plate; The first control module is electrically connected to the motor, the distance sensor and the main control module respectively.
[0007] Preferably, a plurality of side support plates are integrally fixedly arranged between the left side of the first vertical fixed plate and the upper end of the horizontal plate.
[0008] Preferably, it also includes: The test area division module is used to obtain the model of the organic electroluminescent device to be tested, and divide the light-emitting surface of the organic electroluminescent device to be tested into several test areas, and arrange brightness detection units according to the positions of the test areas, and each test area corresponds to multiple brightness detection units.
[0009] Preferably, the number of brightness detection units arranged in each test area is calculated based on the following formula: ; is the number of brightness detection units arranged in the i-th test area; is the importance coefficient of brightness detection in the i-th test area; is the area of the i-th test area; is the area of the historical minimum brightness abnormality region of the organic electroluminescent device at the location of the i-th test area; is the rounding symbol; The number of brightness detection units for the i-th test area is The minimum distance between adjacent brightness detection units after evenly distributing the brightness detection units; To ensure the optimal distance for heat dissipation for adjacent brightness detection units; is the quantity adjustment coefficient; is the maximum projection area of the brightness detection unit vertically installed on the left side of the second vertical fixing plate on the left side of the second vertical fixing plate; is the natural logarithm, e is the natural logarithm; Indicates the maximum value.
[0010] Preferably, it also includes: a positioning control module, which is used to work before performing a batch brightness test on the current type of organic electroluminescent devices, and the positioning control module includes: The first acquisition unit is used to acquire the standard brightness value of the corresponding position of each brightness detection unit under the control parameters of the brightness adjustment module test for the organic electroluminescent device sample of the current type with qualified brightness; The wind speed detection unit is detachably arranged at: a key wind speed detection position of the second vertical fixing plate after the brightness detection unit is installed, and a key wind speed detection position of a sample of an organic electroluminescent device of the current type with qualified brightness; The first control module is electrically connected to the first acquisition unit, the wind speed detection unit and the main control module respectively.
[0011] Preferably, the working process of the positioning control module includes: Step S1: obtaining, by a first obtaining unit, a sample of an organic electroluminescent device of a current type with qualified brightness, and a standard brightness value of a corresponding position of each brightness detection unit under a control parameter of a brightness adjustment module test; Step S2: installing a sample of an organic electroluminescent device of the current type with qualified brightness on the right side of the first vertical fixing plate; and installing a heat dissipation module on the front side of the third vertical fixing plate; Step S3: Connect the wind speed detection unit to: the key wind speed detection position of the second vertical fixing plate after the brightness detection unit is installed, and the key wind speed detection position of the current type of organic electroluminescent device sample with qualified brightness; Step S4: obtaining a preset distance range corresponding to the current type of organic electroluminescent device, and selecting a number of first distances from the preset distance range according to preset distance intervals; The first control module controls the motor to work so that the distance sensor detection value is each first distance, and each first distance is maintained for a first preset time. During the first preset time, the main control module controls the heat dissipation module to work, and at the same time, the brightness adjustment module controls the current type of organic electroluminescent device sample with qualified brightness to work with the test control parameter, and controls the brightness detection unit and the wind speed detection unit to detect multiple times within the first preset time, and calculates the brightness evaluation value, wind speed evaluation value and comprehensive evaluation value at each first distance based on the brightness detection unit detection value and the wind speed detection unit detection value; Step S5: Select the first distance whose comprehensive evaluation value is greater than or equal to the preset comprehensive evaluation value and corresponds to the maximum comprehensive evaluation value as the target distance, and control the motor to work so that the distance sensor detection value is the target distance when testing the brightness of the current type of organic electroluminescent devices in batches.
[0012] Preferably, the brightness evaluation value, wind speed evaluation value and comprehensive evaluation value at each first distance position are calculated based on the following formulas: ; is the wind speed evaluation value at the hth first distance; is the total number of key wind speed detection locations of the second vertical fixed plate; is the average detection value of the wind speed detection unit at the i-th key wind speed detection position of the second vertical fixed plate within the first preset time period at the h-th first distance; is the preset reference wind speed of the i-th key wind speed detection position of the second vertical fixing plate; for The number of key wind speed detection locations of the second vertical fixing plate is less than a first preset value; The total number of key wind speed detection locations of the current type of organic electroluminescent device samples with qualified brightness; is the average wind speed detection value of the jth key wind speed detection position of the organic electroluminescent device sample of the current type with qualified brightness within the first preset time period at the hth first distance; is the preset reference wind speed of the jth key wind speed detection position of the organic electroluminescent device sample of the current type; for The number of key wind speed detection locations of the second vertical fixing plate is less than a second preset value; ; ; is the brightness evaluation value of the kth test area at the hth first distance; is the total number of brightness detection units in the kth test area; is the average detection value of the s-th brightness detection unit in the k-th test area at the h-th first distance and the first preset time under the current test control parameters; Under the current test control parameters, The standard brightness value of the corresponding position; is the first preset time length of the kth test area at the hth first distance under the current test control parameters The standard deviation of is the standard deviation of the detection value of the sth brightness detection unit in the kth test area at the hth first distance for the first preset time under the current test control parameters; is the brightness detection importance of the kth test area; is the brightness evaluation value at the hth first distance; is the unit brightness; , They are the first standard deviation weight and the second standard deviation weight respectively; ; is the comprehensive evaluation value at the hth first distance; , They are wind speed assessment weight and brightness assessment weight respectively.
[0013] Preferably, it also includes: The first acquisition module is used to acquire the test control parameters to be tested of the current type of organic electroluminescent device and the standard brightness value for testing of each test area of the organic electroluminescent device under the corresponding test control parameters; during the actual test, the organic electroluminescent device works for a set time under each test control parameter, and the brightness detection unit performs multiple tests within the set time; A first calculation module, configured to calculate a brightness state value and a first state value of each test area under each test control parameter based on an actual brightness detected by a brightness detection unit of the current type of organic electroluminescent device under the test control parameter to be tested and a first acquisition module; A first determination module, configured to determine, according to a first state value-first abnormality level comparison table, that each first state value corresponds to a first abnormality level; A second determination module is used to determine the first abnormality level corresponding to the maximum first state value under all test control parameters of each test area as the final first abnormality level of the test area, and determine the test control parameters corresponding to the final first abnormality level; A third determination module is used to determine the first test control parameter corresponding to the test standard brightness whose brightness state value under the test control parameter corresponding to the final first abnormality level of each test area is in the same brightness range; a second calculation module, configured to determine a second abnormality level of each test area based on the second determination module; A third calculation module, used to obtain a comprehensive abnormality level of each test area based on the first calculation module and the second calculation module; The marking module is used to obtain the regional distribution map of the current type of organic electroluminescent devices and mark the comprehensive abnormality level for each test area.
[0014] Compared with the prior art, the present invention has the following beneficial effects: the brightness of the organic electroluminescent device is adjusted by a brightness adjustment module, the actual brightness information of the organic electroluminescent device under different brightness adjustment module test control parameters is obtained by a brightness detection module, the actual brightness information of the organic electroluminescent device is compared with the standard brightness information of the corresponding organic electroluminescent device, when the absolute value of the difference between the actual brightness information of the organic electroluminescent device and the standard brightness information of the corresponding organic electroluminescent device is greater than a preset difference threshold value, the alarm module gives an alarm, and the alarm information and the difference between the actual brightness information of the organic electroluminescent device and the standard brightness information of the corresponding organic electroluminescent device can be displayed by a display module; The heat dissipation module is used for dissipating heat for the organic electroluminescent device and the brightness detection module. The invention avoids the organic electroluminescent device and the brightness detection module from working for a long time and possibly affecting their working performance and life due to heat increase.
[0015] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the logical structure of the system of the present invention; Figure 2 It is a partial structural schematic diagram of the system of the present invention.
[0017] In the figure: 1. work surface; 2. hollow seat; 3. screw rod; 4. motor; 5. slider; 61. first vertical fixing plate; 62. horizontal plate; 63. side support plate; 7. third vertical fixing plate; 8. second vertical fixing plate. DETAILED DESCRIPTION
[0018] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.
[0019] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0020] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments.
[0021] The present invention provides the following embodiments Embodiment 1, the present invention provides a system for testing the brightness of an organic electroluminescent device, such as Figure 1-Figure 2 As shown, including: A brightness adjustment module, used to adjust the brightness of the organic electroluminescent device, the brightness adjustment module is electrically connected to the organic electroluminescent device control module; A brightness detection module, comprising a plurality of brightness detection units, wherein the plurality of brightness detection units are used to detect the brightness at different light-emitting parts of the organic electroluminescent device; A timer, used to time the working time of the organic electroluminescent device; A heat dissipation module, used for dissipating heat from the organic electroluminescent device and the brightness detection module; A storage module for storing standard brightness information of the organic electroluminescent device under different brightness adjustment module test control parameters; The main control module is electrically connected to the organic electroluminescent device control module, the brightness detection module, the timer, the heat dissipation module, the storage module, the display module, and the alarm module. The display module is used to display the detection results of the brightness detection module.
[0022] The present invention can be used to test the brightness performance of a processed organic electroluminescent device in a short term, or to test the brightness performance of a certain organic electroluminescent device during long-term operation. The present invention should be placed in a dark environment during testing to reduce ambient light interference.
[0023] The working principle and beneficial effects of the above technical solution are as follows: the brightness of the organic electroluminescent device is adjusted by the brightness adjustment module, the actual brightness information of the organic electroluminescent device under different brightness adjustment module test control parameters is obtained by the brightness detection module, the actual brightness information of the organic electroluminescent device is compared with the standard brightness information of the corresponding organic electroluminescent device, when the absolute value of the difference between the actual brightness information of the organic electroluminescent device and the standard brightness information of the corresponding organic electroluminescent device is greater than the preset difference threshold value, the alarm module gives an alarm, and the alarm information and the difference between the actual brightness information of the organic electroluminescent device and the standard brightness information of the corresponding organic electroluminescent device can be displayed by the display module; The heat dissipation module is used for dissipating heat for the organic electroluminescent device and the brightness detection module. The invention avoids the organic electroluminescent device and the brightness detection module from working for a long time and possibly affecting their working performance and life due to heat increase.
[0024] Embodiment 2, on the basis of embodiment 1, as Figure 1-Figure 2 As shown, it also includes: A work surface 1, a hollow seat 2 is arranged on the work surface 1, the upper end of the hollow seat 2 is open, a screw rod 3 is rotatably arranged in the hollow seat 2, the screw rod 3 extends horizontally along the left and right directions, a motor 4 for driving the screw rod 3 to rotate is arranged on one side of the hollow seat 2, a slider 5 is slidably connected in the hollow seat 2 along the left and right directions, and the slider 5 is threadedly connected to the screw rod 3; The L-shaped plate is composed of a first vertical fixing plate 61 and a horizontal plate 62 integrally fixedly arranged at the left portion of the lower end thereof. The first vertical fixing plate 61 and the horizontal plate 62 are fixedly connected to the left portion of the upper end of the work surface 1. The right side of the first vertical fixing plate 61 is used to install an organic electroluminescent device, and the light-emitting surface of the organic electroluminescent device faces the right side; The second vertical fixing plate 8 is fixedly connected to the upper end of the slider 5. The left side of the second vertical fixing plate 8 is used to install the brightness detection module. The second vertical fixing plate 8 is located on the right side of the first vertical fixing plate 61. The third vertical fixing plate 7 is fixedly connected to the upper end of the work surface 1. The third vertical fixing plate 7 is located at the rear side of the hollow seat 2. The front side of the third vertical fixing plate 7 is used to install a heat dissipation module, which is a heat dissipation fan; A distance sensor for detecting the vertical distance between the right side of the second vertical fixing plate 8 and the left side of the first vertical fixing plate 61; The first control module is electrically connected to the motor 4, the distance sensor and the main control module respectively.
[0025] Preferably, a plurality of side support plates 63 are integrally fixedly disposed between the left side of the first vertical fixing plate 61 and the upper end of the horizontal plate 62 .
[0026] The working principle and beneficial effects of the above technical solution are: By controlling the motor 4 to work and drive the screw rod 3 to rotate, the slider 5 is driven to slide left and right on the hollow seat 2, thereby driving the second vertical fixing plate 8 and the brightness detection module thereon to slide left and right on the hollow seat 2, and adjusting the distance between the brightness detection module and the organic electroluminescent device to meet the brightness detection requirements of different organic electroluminescent devices; The first vertical fixing plate 61 , the horizontal plate 62 , and the side supporting plate 63 ensure the stability of the L-shaped plate and the reliability of the connection with the hollow seat 2 .
[0027] Embodiment 3, based on Embodiment 1 or 2, further comprises: The test area division module is used to obtain the model of the organic electroluminescent device to be tested, and divide the light-emitting surface of the organic electroluminescent device to be tested into several test areas, and arrange brightness detection units according to the positions of the test areas, and each test area corresponds to multiple brightness detection units.
[0028] The beneficial effect of the above technical solution is: by dividing the area and each test area corresponds to a plurality of brightness detection units, it is convenient to ensure reliable brightness detection of each test area.
[0029] Embodiment 4, based on Embodiment 3, the number of brightness detection units arranged in each test area is calculated based on the following formula: ; is the number of brightness detection units arranged in the i-th test area; is the importance coefficient of brightness detection in the i-th test area (the value is greater than 0 and less than 1); is the area of the i-th test area; is the area of the historical minimum brightness abnormality region of the organic electroluminescent device at the location of the i-th test area; is the rounding symbol; The number of brightness detection units for the i-th test area is The minimum distance between adjacent brightness detection units after evenly distributing the brightness detection units; The optimal distance between adjacent brightness detection units to ensure heat dissipation effect (can be obtained based on testing, this distance can ensure that when blowing air to dissipate heat, there can be a certain wind speed around the brightness detection unit); is the quantity adjustment coefficient (the value is greater than 0 and less than 1); is the maximum projection area of the brightness detection unit vertically installed on the left side of the second vertical fixing plate 8 on the left side of the second vertical fixing plate 8; is the natural logarithm, e is the natural logarithm; Indicates the maximum value.
[0030] The beneficial effects of the above technical solution are: based on the importance coefficient of brightness detection in the test area, the area of the test area, the area of the historical minimum brightness abnormality area of the organic electroluminescent device at the test area, the optimal distance between adjacent brightness detection units to ensure heat dissipation effect, and the maximum projection area of the brightness detection unit vertically installed on the left side of the second vertical fixed plate 8 on the left side of the second vertical fixed plate 8, the number of brightness detection units in each test area is determined, so as to ensure that the number of brightness detection units meets the testing requirements and heat dissipation requirements of different test areas.
[0031] Embodiment 5, based on any one of Embodiments 3-4, further comprises: a positioning control module, the positioning control module is used to work before performing a batch brightness test on the current type of organic electroluminescent devices, and the positioning control module comprises: The first acquisition unit is used to acquire the standard brightness value of the corresponding position of each brightness detection unit under the control parameters of the brightness adjustment module test for the organic electroluminescent device sample of the current type with qualified brightness; The wind speed detection unit is detachably arranged at: the key wind speed detection position of the second vertical fixing plate 8 after the brightness detection unit is installed, and the key wind speed detection position of the current type of organic electroluminescent device sample with qualified brightness; The first control module is electrically connected to the first acquisition unit, the wind speed detection unit and the main control module respectively.
[0032] The working process of the positioning and control module includes: Step S1: obtaining a sample of an organic electroluminescent device of the current type with qualified brightness through a first acquisition unit, and the standard brightness value of the corresponding position of each brightness detection unit under the test control parameter of the brightness adjustment module; the test control parameter of the working process of the positioning control module selects any one of the test control parameters that need to be tested for the organic electroluminescent device of the current type; Step S2: Install the current type of organic electroluminescent device sample with qualified brightness to the right side of the first vertical fixing plate 61; and install the heat dissipation module on the front side of the third vertical fixing plate 7; Step S3: Connect the wind speed detection unit to: the key wind speed detection position of the second vertical fixing plate 8 after the brightness detection unit is installed, and the key wind speed detection position of the current type of organic electroluminescent device sample with qualified brightness; Step S4: obtaining a preset distance range corresponding to the current type of organic electroluminescent device (the preset distance range may be set according to the attenuation state of light, and the preset distance range may correspond to the ideal allowable distance between the detection surface of the brightness detection unit and the light-emitting surface of the organic electroluminescent device sample from the contact point to the light attenuation state, and the detection surface of the brightness detection unit and the light-emitting surface of the organic electroluminescent device sample), and selecting a plurality of first distances from the preset distance range according to the preset distance interval; The first control module controls the motor 4 to work so that the distance sensor detection value is each first distance, and each first distance is maintained for a first preset time. During the first preset time, the main control module controls the heat dissipation module to work, and at the same time, the brightness adjustment module controls the current type of organic electroluminescent device sample with qualified brightness to work with the test control parameter, and controls the brightness detection unit and the wind speed detection unit to detect multiple times within the first preset time, and calculates the brightness evaluation value, wind speed evaluation value and comprehensive evaluation value at each first distance based on the brightness detection unit detection value and the wind speed detection unit detection value; Step S5: Select the first distance whose comprehensive evaluation value is greater than or equal to the preset comprehensive evaluation value and corresponds to the maximum comprehensive evaluation value as the target distance, and control the motor 4 to work so that the distance sensor detection value is the target distance when testing the batch brightness of the current type of organic electroluminescent devices.
[0033] Preferably, the brightness evaluation value, wind speed evaluation value and comprehensive evaluation value at each first distance position are calculated based on the following formulas: ; is the wind speed evaluation value at the hth first distance; is the total number of key wind speed detection locations of the second vertical fixing plate 8; is the average detection value of the wind speed detection unit at the i-th key wind speed detection position of the second vertical fixed plate 8 within the first preset time period at the h-th first distance; is the preset reference wind speed of the i-th key wind speed detection position of the second vertical fixing plate 8; for The number of key wind speed detection locations of the second vertical fixing plate 8 is less than a first preset value; The total number of key wind speed detection locations of the current type of organic electroluminescent device samples with qualified brightness; is the average wind speed detection value of the jth key wind speed detection position of the organic electroluminescent device sample of the current type with qualified brightness within the first preset time period at the hth first distance; is the preset reference wind speed of the jth key wind speed detection position of the organic electroluminescent device sample of the current type; for The number of key wind speed detection locations of the second vertical fixing plate 8 is less than a second preset value; ; ; is the brightness evaluation value of the kth test area at the hth first distance; is the total number of brightness detection units in the kth test area; is the average detection value of the sth brightness detection unit in the kth test area at the hth first distance and the first preset time under the current test control parameters; Under the current test control parameters, The standard brightness value of the corresponding position; is the first preset time length of the kth test area at the hth first distance under the current test control parameters The standard deviation of is the standard deviation of the detection value of the sth brightness detection unit in the kth test area at the hth first distance for the first preset time under the current test control parameters; is the brightness detection importance of the kth test area; is the brightness evaluation value at the hth first distance; is the unit brightness; , They are the first standard deviation weight and the second standard deviation weight (both values are greater than 0 and less than 1); ; is the comprehensive evaluation value at the hth first distance; , They are wind speed assessment weight and brightness assessment weight respectively.
[0034] The beneficial effects of the above technical solution are as follows: the distance between the brightness detection module and the organic electroluminescent device is different, and the detection results of the brightness detection module are different due to the attenuation state, irradiation state, etc. of the light. At the same time, due to the difference in the air inlet space, the key wind speed detection part of the second vertical fixing plate 8 after the brightness detection unit is installed and the key wind speed detection part of the current type of organic electroluminescent device sample with qualified brightness have different wind speeds, thereby different heat dissipation states; The positioning and control module is used to work before the batch brightness test of the current type of organic electroluminescent devices is carried out. When the positioning and control module is working, the current type of organic electroluminescent device samples with qualified brightness are subjected to irradiation test and ventilation test at different first distances, and the brightness evaluation value, wind speed evaluation value and comprehensive evaluation value at each first distance are calculated based on the detection value of the brightness detection unit and the detection value of the wind speed detection unit; the wind speed evaluation value It reflects the comprehensive wind speed satisfaction state of the key wind speed detection position of the second vertical fixing plate 8 after the brightness detection unit is installed, and the key wind speed detection position of the current type of organic electroluminescent device sample with qualified brightness (when The brightness evaluation value reflects the ratio of the actual brightness of each brightness detection point to the standard brightness. and uniform state ; It reflects the uniformity of the brightness ratio of each brightness detection point, thus reflecting the similarity between the overall brightness distribution and the standard brightness distribution; The first distance whose comprehensive evaluation value is greater than or equal to the preset comprehensive evaluation value and corresponds to the maximum comprehensive evaluation value is selected as the target distance. When the current type of organic electroluminescent devices are batch-brightness tested, the motor 4 is controlled to work so that the distance sensor detection value is the target distance, ensuring that the brightness detection module and the organic electroluminescent devices are at an appropriate distance when the current type of organic electroluminescent devices are batch-brightness tested, thereby ensuring the reliability of brightness detection and reliable heat dissipation.
[0035] When testing the brightness of batches of organic electroluminescent devices of the current type, the detection value of the real-time brightness detection unit is obtained, and the detection value of each brightness detection unit corresponding to the detection of the qualified brightness sample of the current type of organic electroluminescent device at the target distance is used as the standard brightness value for testing. The real-time brightness detection unit detection value is compared with the corresponding standard brightness value for testing to determine whether the tested organic electroluminescent device of the current type is qualified. If it is unqualified, the main control module controls the alarm module to alarm, thereby ensuring reliable testing of the current type of organic electroluminescent devices.
[0036] Embodiment 6, on the basis of any one of Embodiments 3-5, a first acquisition module is used to acquire the test control parameters to be tested of the current type of organic electroluminescent device and the standard brightness value for testing of each test area of the organic electroluminescent device under the corresponding test control parameters (corresponding to the distance between the current type of organic electroluminescent device and the brightness detection module during the test); during the actual test, the organic electroluminescent device works for a set time under each test control parameter, and the brightness detection unit performs multiple tests within the set time; A first calculation module, configured to calculate a brightness state value and a first state value of each test area under each test control parameter based on an actual brightness detected by a brightness detection unit of the current type of organic electroluminescent device under the test control parameter to be tested and a first acquisition module; ; ; The brightness state value of the rth test area under the dth test control parameter; is the first state value of the dth test control parameter in the rth test area; ln is the natural logarithm, is the dth test control parameter of the rth test area. The average detection value of brightness detection units; is the dth test control parameter of the rth test area. The standard brightness value for testing each brightness detection unit; The state division benchmark under the dth test control parameter; is the dth test control parameter of the rth test area. The standard deviation of the detection values of the brightness detection units; is the rth test area The standard deviation of is the logarithm to base 10; is the unit brightness; R is the total number of brightness detection units; A first determination module, configured to determine, according to a first state value-first abnormality level comparison table, that each first state value corresponds to a first abnormality level; A second determination module is used to determine the first abnormality level corresponding to the maximum first state value under all test control parameters of each test area as the final first abnormality level of the test area, and determine the test control parameters corresponding to the final first abnormality level; A third determination module is used to determine the first test control parameter corresponding to the test standard brightness whose brightness state value under the test control parameter corresponding to the final first abnormality level of each test area is in the same brightness range; a second calculation module, configured to determine a second abnormality level of each test area based on the second determination module; ; is the second anomaly level of the rth test area; is the test control parameter corresponding to the final first abnormality level of the rth test area; The total number of first test control parameters corresponding to the test standard brightness whose brightness state values under the test control parameters corresponding to the final first abnormality level of the rth test area are in the same brightness range; The brightness state value under the test control parameter corresponding to the final first abnormal level of the rth test area is in the same brightness range, and the yth first test control parameter corresponding to the test standard brightness; Assigning benchmark values for test control parameters; A third calculation module, used to obtain a comprehensive abnormality level of each test area based on the first calculation module and the second calculation module; ; is the comprehensive abnormality level of the rth test area; max represents the maximum value; ,
[0037] They are the first abnormality level weight and the second abnormality level weight (the values are greater than 0 and less than 1 respectively); The marking module is used to obtain the regional distribution map of the current type of organic electroluminescent devices and mark the comprehensive abnormality level for each test area.
[0038] The beneficial effects of the above technical solution are: The deviation between the brightness detection unit detection value of each test area and the corresponding test standard brightness value , and the brightness distribution state of the test area (when dividing the test area, the brightness of the organic electroluminescent devices in the same test area is close) to obtain the first state value of each test area, thereby obtaining the final first abnormality level of each test area; Then, a first test control parameter matching the brightness state value of the final first abnormal level is determined, and a second abnormal level is obtained according to the difference state between the first test control parameter and the test control parameter corresponding to the final first abnormal level, and the comprehensive abnormal level of each test area is obtained by combining the first abnormal level and the second abnormal level, so as to obtain the comprehensive abnormal state of each test area. A marking module is used to obtain a regional distribution map of the current type of organic electroluminescent devices, and mark the comprehensive abnormal level for each test area, so as to determine the treatment measures for the current type of organic electroluminescent devices according to the marking results (processing according to the preset processing rules, including scrapping or repair).
[0039] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.
Claims
1. A system for testing brightness of an organic electroluminescent device, characterized in that: include: A brightness adjustment module, used to adjust the brightness of the organic electroluminescent device, the brightness adjustment module is electrically connected to the organic electroluminescent device control module; A brightness detection module, comprising a plurality of brightness detection units, wherein the plurality of brightness detection units are used to detect the brightness at different light-emitting parts of the organic electroluminescent device; A timer, used to time the working time of the organic electroluminescent device; A heat dissipation module, used for dissipating heat from the organic electroluminescent device and the brightness detection module; A storage module for storing standard brightness information of the organic electroluminescent device under different brightness adjustment module test control parameters; The main control module is electrically connected to the organic electroluminescent device control module, the brightness detection module, the timer, the heat dissipation module, the storage module, the display module and the alarm module respectively.
2. The organic electroluminescent device brightness test system according to claim 1, characterized in that: Also includes: A work surface (1), wherein a hollow seat (2) is arranged on the work surface (1), the upper end of the hollow seat (2) is open, a screw rod (3) is rotatably arranged in the hollow seat (2), the screw rod (3) extends horizontally in the left-right direction, a motor (4) for driving the screw rod (3) to rotate is arranged on one side of the hollow seat (2), a slider (5) is slidably connected in the hollow seat (2) in the left-right direction, and the slider (5) is threadedly connected to the screw rod (3); The L-shaped plate is composed of a first vertical fixing plate (61) and a horizontal plate (62) integrally fixedly arranged at the left portion of the lower end thereof, the first vertical fixing plate (61) and the horizontal plate (62) are fixedly connected to the left portion of the upper end of the workbench (1), the right side of the first vertical fixing plate (61) is used to install an organic electroluminescent device, and the light-emitting surface of the organic electroluminescent device faces the right side; A second vertical fixing plate (8) is fixedly connected to the upper end of the slider (5); the left side of the second vertical fixing plate (8) is used to install a brightness detection module; the second vertical fixing plate (8) is located on the right side of the first vertical fixing plate (61); A third vertical fixing plate (7) is fixedly connected to the upper end of the work surface (1), the third vertical fixing plate (7) is located at the rear side of the hollow seat (2), and the front side of the third vertical fixing plate (7) is used to install a heat dissipation module, and the heat dissipation module is a heat dissipation fan; A distance sensor, used to detect the vertical distance between the right side of the second vertical fixing plate (8) and the left side of the first vertical fixing plate (61); The first control module is electrically connected to the motor (4), the distance sensor and the main control module respectively.
3. The organic electroluminescent device brightness test system according to claim 2, characterized in that: A plurality of side support plates (63) are integrally fixedly arranged between the left side of the first vertical fixed plate (61) and the upper end of the horizontal plate (62).
4. The organic electroluminescent device brightness test system according to claim 2, characterized in that: Also includes: The test area division module is used to obtain the model of the organic electroluminescent device to be tested, and divide the light-emitting surface of the organic electroluminescent device to be tested into several test areas, and arrange brightness detection units according to the positions of the test areas, and each test area corresponds to multiple brightness detection units.
5. The organic electroluminescent device brightness test system according to claim 4, characterized in that: The number of brightness detection units arranged in each test area is calculated based on the following formula: ; is the number of brightness detection units arranged in the i-th test area; is the importance coefficient of brightness detection in the i-th test area; is the area of the i-th test area; is the area of the historical minimum brightness abnormality region of the organic electroluminescent device at the location of the i-th test area; is the rounding symbol; The number of brightness detection units for the i-th test area is The minimum distance between adjacent brightness detection units after evenly distributing the brightness detection units; To ensure the optimal distance for heat dissipation for adjacent brightness detection units; is the quantity adjustment coefficient; is the maximum projection area of a brightness detection unit vertically mounted on the left side of the second vertical fixing plate (8) on the left side of the second vertical fixing plate (8); is the natural logarithm, e is the natural logarithm; Indicates the maximum value.
6. The organic electroluminescent device brightness test system according to claim 4, characterized in that: Also includes: Positioning and control module, the positioning and control module is used to work before batch brightness test of the current type of organic electroluminescent devices, the positioning and control module includes: The first acquisition unit is used to acquire the standard brightness value of the corresponding position of each brightness detection unit under the control parameters of the brightness adjustment module test for the organic electroluminescent device sample of the current type with qualified brightness; The wind speed detection unit is detachably arranged at: a key wind speed detection position of the second vertical fixing plate (8) after the brightness detection unit is installed, and a key wind speed detection position of a sample of an organic electroluminescent device of the current type with qualified brightness; The first control module is electrically connected to the first acquisition unit, the wind speed detection unit and the main control module respectively.
7. The organic electroluminescent device brightness test system according to claim 6, characterized in that: The working process of the positioning and control module includes: Step S1: obtaining, by a first obtaining unit, a sample of an organic electroluminescent device of a current type with qualified brightness, and a standard brightness value of a corresponding position of each brightness detection unit under a control parameter of a brightness adjustment module test; Step S2: installing a sample of an organic electroluminescent device of the current type with qualified brightness on the right side of the first vertical fixing plate (61); and installing a heat dissipation module on the front side of the third vertical fixing plate (7); Step S3: connecting the wind speed detection unit to: the key wind speed detection position of the second vertical fixing plate (8) after the brightness detection unit is installed, and the key wind speed detection position of the current type of organic electroluminescent device sample with qualified brightness; Step S4: obtaining a preset distance range corresponding to the current type of organic electroluminescent device, and selecting a number of first distances from the preset distance range according to preset distance intervals; The first control module controls the motor (4) to work so that the distance sensor detection value is each first distance, and each first distance is maintained for a first preset time length, the main control module controls the heat dissipation module to work within the first preset time length, and the brightness adjustment module controls the current type of organic electroluminescent device sample with qualified brightness to work with the test control parameter, and controls the brightness detection unit and the wind speed detection unit to detect multiple times within the first preset time length, and calculates the brightness evaluation value, wind speed evaluation value and comprehensive evaluation value at each first distance based on the brightness detection unit detection value and the wind speed detection unit detection value; Step S5: selecting a first distance whose comprehensive evaluation value is greater than or equal to a preset comprehensive evaluation value and corresponds to the maximum comprehensive evaluation value as the target distance, and controlling the motor (4) to work so that the distance sensor detection value is the target distance when performing a batch brightness test on the organic electroluminescent device of the current type.
8. The organic electroluminescent device brightness test system according to claim 7, characterized in that: The brightness evaluation value, wind speed evaluation value and comprehensive evaluation value of each first distance position are calculated based on the following formulas: ; is the wind speed evaluation value at the hth first distance; is the total number of key wind speed detection locations of the second vertical fixing plate (8); is the average detection value of the wind speed detection unit at the i-th key wind speed detection position of the second vertical fixed plate (8) within the first preset time period at the h-th first distance; is a preset reference wind speed at the i-th key wind speed detection position of the second vertical fixing plate (8); for The number of key wind speed detection locations of the second vertical fixing plate (8) is less than a first preset value; The total number of key wind speed detection locations of the current type of organic electroluminescent device samples with qualified brightness; is the average wind speed detection value of the jth key wind speed detection position of the organic electroluminescent device sample of the current type with qualified brightness within the first preset time period at the hth first distance; is the preset reference wind speed of the jth key wind speed detection position of the organic electroluminescent device sample of the current type; for The number of key wind speed detection locations of the second vertical fixing plate (8) is less than a second preset value; ； ; is the brightness evaluation value of the kth test area at the hth first distance; is the total number of brightness detection units in the kth test area; is the average detection value of the s-th brightness detection unit in the k-th test area at the h-th first distance and the first preset time under the current test control parameters; Under the current test control parameters, The standard brightness value of the corresponding position; is the first preset time length of the kth test area at the hth first distance under the current test control parameters The standard deviation of is the standard deviation of the detection value of the sth brightness detection unit in the kth test area at the hth first distance for the first preset time under the current test control parameters; is the brightness detection importance of the kth test area; is the brightness evaluation value at the hth first distance; is the unit brightness; , They are the first standard deviation weight and the second standard deviation weight respectively; ; is the comprehensive evaluation value at the hth first distance; , They are wind speed assessment weight and brightness assessment weight respectively.
9. The organic electroluminescent device brightness test system according to claim 2, characterized in that: Also includes: The first acquisition module is used to acquire the test control parameters to be tested of the current type of organic electroluminescent device and the standard brightness value for testing of each test area of the organic electroluminescent device under the corresponding test control parameters; during the actual test, the organic electroluminescent device works for a set time under each test control parameter, and the brightness detection unit performs multiple tests within the set time; A first calculation module, configured to calculate a brightness state value and a first state value of each test area under each test control parameter based on an actual brightness detected by a brightness detection unit of the current type of organic electroluminescent device under the test control parameter to be tested and a first acquisition module; A first determination module, configured to determine, according to a first state value-first abnormality level comparison table, that each first state value corresponds to a first abnormality level; A second determination module is used to determine the first abnormality level corresponding to the maximum first state value under all test control parameters of each test area as the final first abnormality level of the test area, and determine the test control parameters corresponding to the final first abnormality level; A third determination module is used to determine the first test control parameter corresponding to the test standard brightness whose brightness state value under the test control parameter corresponding to the final first abnormality level of each test area is in the same brightness range; a second calculation module, configured to determine a second abnormality level of each test area based on the second determination module; A third calculation module, used to obtain a comprehensive abnormality level of each test area based on the first calculation module and the second calculation module; The marking module is used to obtain the regional distribution map of the current type of organic electroluminescent devices and mark the comprehensive abnormality level for each test area.