CN115931299A - Maximum brightness and service life acquisition method and device, storage medium and electronic equipment - Google Patents
Maximum brightness and service life acquisition method and device, storage medium and electronic equipment Download PDFInfo
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Abstract
The invention provides a method and a device for acquiring maximum brightness and service life, a storage medium and electronic equipment, which are used for accurately acquiring the maximum brightness when the service life of a display device is tested.
Description
Technical Field
The application belongs to the field of display device testing, and particularly relates to a method and a device for acquiring maximum brightness and service life, a storage medium and electronic equipment.
Background
In recent years, with the increasing demand for illumination and display, various display devices with excellent performance come into the field of vision of developers, and in the process of developing display devices, life test evaluation of materials of display devices is required. For example, the material life T95 is calculated by estimating the life of the display material from the time consumed when the display material is decreased from the maximum luminance to 95% luminance. In the existing life test experiment, the obtained material life is often different from the actual life of the material, and the test result is not accurate.
Disclosure of Invention
The embodiment of the application provides a method, a device, equipment and a system for obtaining the maximum brightness of a display device, which can improve the accuracy of the service life test of the display device.
In a first aspect, an embodiment of the present application provides a method for obtaining maximum brightness of a display device, where the method includes: providing a constant preset voltage to the display device; acquiring a first brightness change relation and a current change relation of a display device along with time change under constant preset voltage; providing a preset initial voltage and a preset cut-off voltage for the display device, and acquiring a second brightness change relation of the brightness of the display device along with the change of the voltage and the current from the preset initial voltage to the preset cut-off voltage; acquiring a first current value and a first brightness value corresponding to a preset voltage in a second brightness variation relation; the highest luminance value of the display device in the first luminance variation relationship is determined by the first current value and the first luminance value.
Further, determining a highest luminance value of the display device in the first luminance variation relationship by the first current value and the first luminance value includes: acquiring a first current point which is the same as the first current value in the current change relation; acquiring a first brightness point of a first brightness change relation at the same time point through the first current point; determining the first brightness value as the brightness value of the first brightness point; and obtaining the brightness value corresponding to the highest brightness point in the first brightness change relation through the brightness value of the first brightness point, namely obtaining the highest brightness value of the display device.
Further, the initial brightness point in the first brightness change relationship is the virtual initial brightness value, and the first brightness change relationship is a relationship curve between the virtual brightness value and time obtained according to the virtual initial brightness value; obtaining a brightness value corresponding to the highest brightness point in the first brightness change relationship by the brightness value of the first brightness point, including: acquiring a virtual brightness value of a first brightness point and a virtual brightness value of a highest brightness point in a first brightness change relation; and acquiring a brightness value corresponding to the highest brightness point according to the first brightness value, the virtual brightness value of the first brightness point and the virtual brightness value of the highest brightness point.
Further, acquiring a brightness value corresponding to the maximum brightness point according to the first brightness value, the virtual brightness value of the first brightness point, and the virtual brightness of the maximum brightness point, includes: acquiring the ratio of the first brightness value to the virtual brightness value of the first brightness point; and obtaining the product of the virtual brightness value of the highest brightness point and the ratio, and obtaining the brightness value corresponding to the highest brightness point.
Further, obtaining a brightness value corresponding to the highest brightness point according to the first brightness value, the virtual brightness value of the first brightness point, and the virtual brightness of the highest brightness point, includes: and obtaining the ratio of the virtual brightness value of the highest brightness point to the virtual brightness value of the first brightness point, and obtaining the product of the first brightness value and the ratio to obtain the brightness value corresponding to the highest brightness point.
In a second aspect, an embodiment of the present invention provides an apparatus for obtaining maximum brightness of a display device, where the apparatus includes: the testing module is configured to acquire a first brightness change relation and a current change relation of the display device changing along with time under a constant preset voltage, and acquire a second brightness change relation of the display device changing along with the voltage and the current from a preset initial voltage to a preset cut-off voltage; the parameter obtaining module is configured to obtain a first current value and a first brightness value corresponding to a preset voltage in a second brightness change relation; and the calculation module is configured to determine the highest brightness value of the display device in the first brightness variation relation through the first current value and the first brightness value.
Further, the device further comprises a parameter determining module configured to determine a first current point in the current variation relation, which is the same as the first current value, according to the first current value and the first brightness value, and determine a first brightness point in the first brightness variation relation at the same time point according to the first current point, and determine the first brightness value as the brightness value of the first brightness point; and the computing module is configured to obtain a brightness value corresponding to the highest brightness point in the first brightness change relationship through the brightness value of the first brightness point, so that the highest brightness value of the display device is obtained.
In a third aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed on a computer, the computer program causes the computer to execute the method as provided in the first aspect of the embodiment of the present invention.
In a fourth aspect, an embodiment of the present invention provides an electronic device, which includes a memory and a processor, where the processor executes the method according to the first aspect by calling a computer program stored in the memory.
In a fifth aspect, an embodiment of the present invention provides a method for acquiring a lifetime of a display device, including: acquiring the highest brightness value of the display device acquired by the method provided by the first aspect of the embodiment of the invention; obtaining the attenuation time of the display device from the attenuation of the highest brightness value to a preset brightness value in the first brightness change relation; the lifetime of the display device is obtained by the decay time.
Compared with the traditional mode, the method has the advantages that the inventor creatively discovers the reason causing the error between the test service life and the actual service life, so that an efficient solution is provided, the same current is taken as a reference factor, the error possibly caused by the change of the voltage is also considered, the consistency of the voltage is also considered under the condition that the contrast brightness current value is consistent with the service life, the accuracy of determining the maximum brightness is improved through the consistency of the two parameters, and the accuracy of calculating the service life of the display device is improved.
Drawings
The technical solutions and advantages of the present application will become apparent from the following detailed description of specific embodiments of the present application when taken in conjunction with the accompanying drawings.
Fig. 1 is a graph illustrating the luminance and current of a display device according to an embodiment of the present invention during a lifetime test.
Fig. 2 is a graph illustrating luminance and current variation with voltage during luminance testing of a display device according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Fig. 4 is a flowchart of a method for obtaining the maximum brightness of a display device according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of a functional module architecture of a maximum brightness obtaining apparatus of a display device according to an embodiment of the present invention.
Icon: an electronic device-10; display device maximum brightness obtaining means-11; test module-111; a parameter obtaining module-112; a parameter determination module-113; a computing module-114; a memory-12; a processor-13.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
At present, a constant voltage test mode is commonly used in the life test evaluation of materials, and the process of the test mode is to perform life test first, then perform brightness test, and bring the corresponding brightness value measured in the brightness test into the corresponding point in the life test for conversion, so as to obtain the maximum brightness of the display device in the life test process, and the life of the display device can be calculated and obtained through the maximum brightness and the test time. Of course, as another test mode, the brightness test may be performed first, then the life test may be performed, and then the corresponding brightness value measured in the brightness test may be substituted into the corresponding point in the life test for conversion. Compared with the two phases, the service life test is carried out firstly, then the brightness test is carried out, the electrical property of the display device is relatively more stable, and the obtained data error is smaller.
Specifically, for the life test, the change of the current and the brightness of the display device is tested from the beginning to the end of the test under a constant voltage, wherein the selection of the test end point is set by people, for example, the test is stopped when the brightness of the display device is reduced to 95% of the initial brightness. Through the above process, the trend of the luminance of the display device with time can be obtained, and for example, the trend can be represented by a curve, as shown by the line I in fig. 1, the first luminance change relationship of the display device measured at a constant voltage of 6.5V is expressed in the form of a curve, and it is easily understood that in other embodiments, the trend can also be expressed in other forms, and the internal logic is the corresponding relationship between the voltage and the luminance. Meanwhile, in the lifetime test process, a trend of the current of the display device with time can be obtained as shown by line II in fig. 1.
The life test of the display device is usually to test a large number of display devices at the same time, in order to increase the test efficiency, it is difficult to match a spectrometer for each display device in the life test process, so that the real brightness of each display device cannot be directly obtained, the brightness value of the I-line in fig. 1 is a virtual brightness value artificially given to an initial brightness value in advance, then an optical signal of the display device is converted into an electrical signal by a silicon photodiode to obtain simple data change, and further a first brightness change relation such as the I-line is obtained to reflect the change trend of the brightness of the display device along with time, but in the life test of the display device, the real highest brightness of the display device needs to be known. Therefore, after the lifetime test is finished, the brightness test of the display device is further required to be continued so as to obtain a real brightness value. In the brightness test process, the brightness value of the display device at the voltage position which is the same as the preset voltage in the life test process is obtained, the brightness value is brought into the test end point in the life test, so that the ratio between the real brightness value and the virtual brightness value is obtained, the maximum real brightness value corresponding to the maximum virtual brightness value is further determined in the first brightness change relation, and then the maximum real brightness value and the life test time are calculated, so that the service life of the display device is obtained.
The above process can perform relatively accurate test calculation on the service life of the display device on the premise of meeting the maximum test efficiency, however, a certain difference may exist between the actual service life of the display device and the test service life, and the accuracy is not high. To date, researchers in the industry are unaware of the reasons why this gap occurs, and there is no test method that is more accurate and meets efficient testing.
Through repeated research of the inventor of the application, the reason that the service life of the display device measured by the test experiment is larger than the real service life is found, and the reason that the test result is inaccurate is that the ratio between the real brightness and the virtual brightness is calculated to have deviation in the process of determining the maximum brightness of the display device by the service life test experiment. Taking a 6.5V constant voltage test as an example, in the current test method, the brightness at 6.5V measured in the brightness test of the display device is directly substituted into the brightness at the end point of the life test, and the current at the end of the life is ignored, and the current corresponding to the brightness value at 6.5V in the brightness test may not be the same as the current at the same brightness value at 6.5V in the life test.
For example, referring to fig. 1 and 2, fig. 2 shows a graph of the luminance and current of the display device as a function of voltage during a luminance test. The current measuring and calculating method is to read the brightness value recorded under 6.5V in the variation relation obtained by the brightness test in fig. 2, that is, the brightness value corresponding to the point 4 in fig. 2, and substitute the position of the point 3 in fig. 1, that is, the brightness value corresponding to the point 4 in fig. 2 is considered as the real brightness value of the point 3 in fig. 1, compare the brightness value of the point 4 in fig. 2 with the brightness value of the point 3 in fig. 1, so as to obtain a ratio, fit the line I in fig. 1 through the ratio to obtain the brightness value of the whole line I, and then obtain the brightness value of the highest point in the line I, that is, the highest brightness value. However, it can be seen from the comparison between the point 3 in fig. 1 and the point 4 in fig. 2 that the current values at the same 6.5V are different, the voltage at the point 3 in fig. 1 is 3mA, and the voltage at the point 4 in fig. 2 is 3.5mA, and the difference in current values directly affects the change of the brightness, so that the current estimation method may have a large error.
In the whole life test process, the state of the device is always in a constant voltage lighting state, and the voltage value is constant. The change of the brightness of the display device can be reflected by the change of the current value, and the brightness is in a correlation relation with the current. So that not only the voltage value of the display device but also the current variation is considered when substituting the true luminance value into the calculation for the back-calculation.
Through research of the inventor, the reason of the service life error caused in the current constant voltage test mode is determined, and aiming at the defect, the method for acquiring the maximum brightness of the display device provided by the invention is further designed, is executed through the electronic equipment 10, and improves the selection value of the real brightness value acquired in the current brightness test, which is substituted into the service life test. An embodiment of the present invention provides an electronic device 10, please refer to fig. 3, which is a schematic structural diagram of the electronic device 10, and the electronic device 10 includes a display device maximum brightness obtaining apparatus 11, a memory 12 and a processor 13. The memory 12 and the processor 13 are electrically connected to each other directly or indirectly to realize data transmission or interaction. For example, electrical connections may be made through one or more communication buses or signal lines. The display device maximum brightness acquiring means 11 includes at least one software function module which can be stored in the memory 12 in the form of software or firmware (firmware) or is solidified in an Operating System (OS) of the electronic device 10. The processor 13 is used for executing executable modules stored in the memory 12, such as software functional modules and computer programs included in the display device maximum brightness acquiring apparatus 11.
The Memory 12 may be, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read Only Memory (PROM), an Erasable Read Only Memory (EPROM), an electrically Erasable Read Only Memory (EEPROM), and the like. The memory 12 is used for storing programs, and the processor 13 executes the programs after receiving execution instructions.
The display device maximum brightness acquiring apparatus 11 according to the embodiment of the present invention is configured to execute the display device maximum brightness acquiring method according to the embodiment of the present invention, and the display device maximum brightness acquiring method according to the embodiment of the present invention is described in detail below.
The embodiment of the invention improves the existing display device life testing and calculating method, considers the consistency of voltage under the condition of ensuring the consistency of brightness, current value and life, and improves the accuracy of life brightness reverse estimation through the consistency of two parameters.
Fig. 4 is a flowchart of a method for obtaining maximum brightness of a display device according to an embodiment of the present invention, including:
step S101, acquiring a first brightness change relation and a current change relation of the display device changing along with time under a constant preset voltage.
It is easy to understand that before the test, a constant preset voltage needs to be input to the display device, for example, the electronic device may control a constant voltage generating device to generate the constant preset voltage and transmit the constant preset voltage to the display device, the step S102 corresponds to a life test stage, the process is a conventional test process, and the magnitude of the constant preset voltage may be selected according to the specific situation of the display device, for example, 6.5V, which is not repeated herein. Before step S101, the method further includes: setting a virtual initial brightness value of the display device. The virtual initial brightness value is freely defined, may be preset by a human, or may be randomly generated or selected by the electronic device 10. After the initial virtual brightness value is determined, the change trend of the virtual brightness of the display device in the service life test interval along with time can be obtained through an optical sensor, and the change trend of the corresponding virtual brightness value is obtained, namely the first brightness change relation is obtained. Meanwhile, the change trend of the current of the display device along with the time is obtained, namely the current change relation is obtained.
And S102, acquiring a second brightness change relation of the brightness of the display device along with the change of the voltage and the current from the preset initial voltage to the preset cut-off voltage.
The step S102 corresponds to a luminance testing stage, the testing process is driven by voltage, the display device is placed in the efficiency testing apparatus, the efficiency testing apparatus sets an initial voltage and a cut-off voltage, and the initial voltage and the cut-off voltage are respectively used as a preset initial voltage and a preset cut-off voltage, a voltage value gradually rises from the initial voltage to the cut-off voltage, during a voltage change process, parameters such as current, efficiency, luminance and the like corresponding to the display device are collected and acquired by the electronic device 10, and then a second luminance change relationship of the luminance of the display device along with the voltage and current changes is obtained. The setting of the off-voltage is not limited, but it is necessary to make the voltage of the display device reach a constant preset voltage in the first luminance variation relation. The values of the initial voltage and the cut-off voltage are not limited in the embodiments of the present invention, for example, the initial voltage may be 0V, and the cut-off voltage may be 7V.
After the lifetime test and the brightness test are finished, the real maximum brightness in the lifetime test needs to be determined. Specifically, the method provided by this embodiment includes:
step S103, in the second brightness variation relationship, a first current value and a first brightness value corresponding to the preset voltage are obtained.
It was mentioned in the foregoing that not only the voltage value of the display device but also the change in current are considered when the actual luminance value is substituted into the calculation for the back-calculation.
Therefore, in the embodiment of the present invention, not only the voltage value identical to the preset voltage is found, but also the corresponding first current value is found according to the voltage value. Referring to fig. 1 and 2, in fig. 1, a line I is a first luminance variation relationship, a line II is a current variation relationship, and fig. 2 is a second luminance variation relationship, which are expressed by a relatively intuitive curve.
In fig. 2, the voltage value corresponding to the point 4 is 6.5V, and is the same as the preset voltage, the first current value, i.e., 3.5mA, corresponding to the point 4 is obtained, and the first luminance value 35000cd/m corresponding to the point 4 is obtained at the same time 2 . First Current value 3.5mA and first luminance value 35000cd/m 2 I.e., selected, to participate in subsequent calculations.
Step S104, determining the highest brightness value of the display device in the first brightness variation relation according to the first current value and the first brightness value.
As shown in fig. 1, in the constant voltage life test process, the voltage is constant, and there are only two variations of current and brightness, so that only the first current point that is the same as the first current value needs to be selected in the current variation relationship during the life test, and the time point of the same current and the same voltage as the current state of the display device can be located, thereby avoiding errors. In fig. 1, a current point 1 in a current variation relation II corresponding to a first current value 3.5mA can be obtained through a time point corresponding to the current point 1, where the time point corresponds to a first brightness point 2 in a first brightness variation relation I, and a virtual brightness value corresponding to the first brightness point 2 is a virtual brightness value that needs to be brought into calculation.
The first brightness point 2 determined by the first brightness change relationship I in fig. 1 is the same as the display device state corresponding to the point 4 in the second brightness change relationship in fig. 2, that is, has the same voltage and the same current, the first brightness value is determined as the brightness value of the first brightness point, and the brightness value corresponding to the highest brightness point in the first brightness change relationship is obtained from the brightness value of the first brightness point, that is, the highest brightness value of the display device is obtained. Since the first luminance point 2 corresponds to a virtual luminance value, and the point 4 in the second luminance variation relationship corresponds to a real luminance value, the conversion ratio, i.e., the ratio, between the virtual luminance value and the real luminance value in the first variation relationship I in fig. 1 can be obtained by performing ratio calculation on the luminance values of the two. And then acquiring a virtual brightness value of the highest brightness point in the first brightness change relation, and acquiring the product of the virtual brightness value of the highest brightness point and the ratio to obtain a brightness value corresponding to the highest brightness point, wherein the brightness value corresponding to the highest brightness point is the highest brightness of the display device. As another embodiment, in the process of obtaining the brightness value corresponding to the highest brightness point according to the first brightness value, the virtual brightness value of the first brightness point, and the virtual brightness value of the highest brightness point, the ratio between the virtual brightness value of the highest brightness point and the virtual brightness value of the first brightness point may be obtained first, and then the product of the first brightness value and the ratio may be obtained, so as to obtain the brightness value corresponding to the highest brightness point. Of course, both of the two calculation manners are conversion performed by the corresponding relationship between the virtual luminance value and the real luminance value, which is not limited in this embodiment.
After the maximum brightness value of the display device is obtained, the embodiment of the invention also provides a method for obtaining the service life of the display device, which includes the steps of firstly obtaining the maximum brightness value of the display device obtained by the method for obtaining the maximum brightness value of the display device, then obtaining the decay time of the display device from the maximum brightness value to the preset brightness value in the first brightness change relation, and finally obtaining the service life of the display device through the decay time. Since the process of obtaining the lifetime of the display device from the decay time is a conventional lifetime estimation process, it is not described herein.
In summary, compared with the conventional method, the method for obtaining the maximum brightness of the display device provided by the embodiment of the invention creatively discovers the cause of the error, thereby providing an efficient solution, not only taking the same voltage as a reference factor, but also considering the error possibly caused by the change of the current, and also considering the consistency of the current under the condition of ensuring the consistency of the back-derived brightness voltage value and the service life, and improving the accuracy of determining the maximum brightness through the consistency of the two parameters, thereby improving the accuracy of calculating the service life of the display device.
The method for obtaining the maximum brightness of the display device provided in this embodiment can be executed by the maximum brightness obtaining apparatus 11 of the display device, please refer to fig. 5, which is a schematic diagram of a functional module architecture of the maximum brightness obtaining apparatus 11 of the display device. The apparatus includes an acquisition module 111, a parameter acquisition module 112, a parameter determination module 113, and a calculation module 114.
The test module 111 is configured to obtain a first luminance variation relation and a current variation relation of the display device changing with time under a constant preset voltage, and obtain a second luminance variation relation of the display device changing with voltage and current from a preset initial voltage to a preset cut-off voltage.
It should be noted that, in other life test experiments, the test module 111 may further obtain a first luminance change relationship and a current change relationship that are not limited to time changes under a constant preset voltage, for example, may further obtain a first luminance change relationship and a current change relationship that are time changes under a changing voltage, a first luminance change relationship and a voltage change relationship that are time changes under a constant preset current, or a first luminance change relationship and a voltage change relationship that are time changes under a changing current, and the like.
The parameter obtaining module 112 is configured to obtain a first current value and a first brightness value corresponding to a preset voltage in the second brightness variation relationship; the calculation module 114 is configured to determine a highest luminance value of the display device in the first luminance variation relationship by the first current value and the first luminance value.
The test module 111 may be configured to perform steps S101, S102 of the maximum brightness obtaining method; the parameter obtaining module 112 is configured to execute step S103; the calculation module 114 may be configured to perform step S104.
In addition, the parameter determining module 113 is configured to determine a first current point in the current variation relationship, which is the same as the first current value, according to the first current value and the first brightness value, and determine a first brightness point in the first brightness variation relationship at the same time point according to the first current point, and determine the first brightness value as the brightness value of the first brightness point. The calculating module 114 is configured to obtain a brightness value corresponding to the highest brightness point in the first brightness change relationship through the brightness value of the first brightness point, that is, obtain the highest brightness value of the display device.
Since the execution processes of the steps in the foregoing method for obtaining the maximum brightness of the display device are described in detail, the working processes of the modules of the device 11 for obtaining the maximum brightness of the display device are not described again here. It will be understood by those skilled in the art that all or part of the steps of the methods of the above embodiments may be performed by instructions, or by instructions controlling associated hardware, which may be stored in a computer-readable storage medium and loaded and executed by a processor.
Therefore, the present application provides a computer-readable storage medium, in which a plurality of instructions are stored, and the instructions can be loaded by a processor to execute the steps of the method corresponding to any embodiment of fig. 4 in the present application, and for specific operations, reference may be made to the description of the method corresponding to any embodiment of fig. 4, which is not repeated herein.
Since the instructions stored in the computer-readable storage medium can execute the steps of the method in any embodiment corresponding to fig. 4 in the present application, the beneficial effects that can be achieved by the method in any embodiment corresponding to fig. 4 in the present application can be achieved, for details, see the foregoing description, and are not described again here.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, the functional modules in the embodiments of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes. It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
Claims (10)
1. A method for obtaining the maximum brightness of a display device is characterized by comprising the following steps:
acquiring a first brightness change relation and a current change relation of a display device along with time change under a constant preset voltage;
acquiring a second brightness change relation of the brightness of the display device along with the change of voltage and current from a preset initial voltage to a preset cut-off voltage;
acquiring a first current value and a first brightness value corresponding to the preset voltage in the second brightness variation relation;
determining a highest luminance value of the display device in the first luminance variation relationship from the first current value and the first luminance value.
2. The maximum luminance obtaining method according to claim 1, wherein the determining the maximum luminance value of the display device in the first luminance variation relationship by the first current value and the first luminance value includes:
acquiring a first current point which is the same as the first current value in the current change relation;
acquiring a first brightness point of the first brightness change relation at the same time point through the first current point;
determining the first brightness value as a brightness value of the first brightness point;
and acquiring a brightness value corresponding to the highest brightness point in the first brightness change relationship according to the brightness value of the first brightness point, namely acquiring the highest brightness value of the display device.
3. The method according to claim 2, wherein the initial brightness point in the first brightness variation relationship is an assigned virtual initial brightness value, and the first brightness variation relationship is a relationship curve of a virtual brightness value obtained according to the virtual initial brightness value with time;
the obtaining, by the brightness value of the first brightness point, the brightness value corresponding to the highest brightness point in the first brightness change relationship includes:
acquiring a virtual brightness value of the first brightness point and a virtual brightness value of the highest brightness point in the first brightness change relation;
and acquiring the brightness value corresponding to the highest brightness point according to the first brightness value, the virtual brightness value of the first brightness point and the virtual brightness value of the highest brightness point.
4. The method according to claim 3, wherein the obtaining the brightness value corresponding to the maximum brightness point according to the first brightness value, the virtual brightness value of the first brightness point, and the virtual brightness of the maximum brightness point comprises:
acquiring the ratio of the first brightness value to the virtual brightness value of the first brightness point;
and obtaining the product of the virtual brightness value of the highest brightness point and the ratio to obtain the brightness value corresponding to the highest brightness point.
5. The method according to claim 3, wherein the obtaining the brightness value corresponding to the maximum brightness point according to the first brightness value, the virtual brightness value of the first brightness point, and the virtual brightness of the maximum brightness point comprises:
acquiring the ratio of the virtual brightness value of the highest brightness point to the virtual brightness value of the first brightness point;
and obtaining the product of the first brightness value and the ratio to obtain the brightness value corresponding to the highest brightness point.
6. An apparatus for obtaining the maximum brightness of a display device, the apparatus comprising:
the testing module is configured to acquire a first brightness change relation and a current change relation of the display device changing along with time under a constant preset voltage, and acquire a second brightness change relation of the display device changing along with the voltage and the current from a preset initial voltage to a preset cut-off voltage; a parameter obtaining module configured to obtain a first current value and a first brightness value corresponding to the preset voltage in the second brightness variation relation;
a calculation module configured to determine a highest luminance value of the display device in the first luminance change relationship from the first current value and the first luminance value.
7. The apparatus for obtaining the maximum brightness of the display device according to claim 6, further comprising:
a parameter determination module configured to determine a first current point in the current variation relationship, which is the same as the first current value, according to the first current value and the first brightness value, and determine a first brightness point in the first brightness variation relationship at the same time point according to the first current point, and determine the first brightness value as a brightness value of the first brightness point;
the calculation module is configured to obtain a brightness value corresponding to a highest brightness point in the first brightness change relationship through the brightness value of the first brightness point, that is, obtain the highest brightness value of the display device.
8. A computer-readable storage medium, on which a computer program is stored, which, when executed on a computer, causes the computer to carry out the method according to any one of claims 1 to 5.
9. An electronic device comprising a memory and a processor, wherein the processor executes the method of any one of claims 1 to 5 by invoking a computer program stored in the memory.
10. A method for acquiring a lifetime of a display device, comprising:
obtaining a maximum luminance value of the display device obtained by the method according to any one of claims 1 to 5;
obtaining the attenuation time of the display device from the highest brightness value to a preset brightness value in a first brightness change relation;
and obtaining the service life of the display device through the decay time.
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