Display brightness range testing method, system, storage medium and electronic device

Abstract

The present invention relates to a display brightness range test method, system, storage medium and electronic device, including: S1, obtaining a target conversion table between an expected brightness value and an expected grayscale value of a display device to be tested; S2, generating a brightness range test signal according to the expected brightness value corresponding to each expected grayscale value in the target conversion table; S3, sending the brightness range test signal to the display device to be tested for testing, obtaining a target test screen of the display device to be tested, and obtaining a maximum brightness value corresponding to a recognizable bright grayscale and a minimum brightness value corresponding to a recognizable dark grayscale from the target test screen; S4, determining a target brightness range of the display device to be tested according to the maximum brightness value and the minimum brightness value. The present invention has simple and reliable measurement results, an efficient method and low cost.

Description

Background Art

[0002] The brightness test methods currently available on the market are complex and require a brightness meter. When the brightness and contrast of a display device are adjusted, the display brightness range of the display device will change, and the test method is complex. Therefore, it is urgent to provide a technical solution to solve the above technical problems. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a display brightness range testing method, system, storage medium and electronic device.

[0004] The technical solution of a display brightness range testing method of the present invention is as follows:

[0005] S1, obtaining a target conversion table between an expected brightness value and an expected grayscale value of a display device to be tested;

[0006] S2, generating a brightness range test signal according to the expected brightness value corresponding to each expected gray value in the target conversion table;

[0007] S3, sending the brightness range test signal to the display device to be tested for testing, obtaining a target test screen of the display device to be tested, and obtaining a maximum brightness value corresponding to a recognizable bright grayscale and a minimum brightness value corresponding to a recognizable dark grayscale from the target test screen;

[0008] S4. Determine a target brightness range of the display device to be tested according to the maximum brightness value and the minimum brightness value.

[0009] The beneficial effects of a display brightness range testing method of the present invention are as follows:

[0010] The display brightness range testing method of the present invention has simple and reliable measurement results, is efficient, and has low cost.

[0011] Based on the above solution, a display brightness range testing method of the present invention can also be improved as follows.

[0012] Further, the S1 includes:

[0013] The target conversion table between the expected brightness value and the expected grayscale value of the display device to be tested is obtained by using the PQ-OETF conversion function.

[0014] Further, each expected grayscale value in the target conversion table corresponds to an expected brightness value; S2 includes:

[0015] S21, generating a gray value ladder according to each expected gray value in the target conversion table;

[0016] S22, performing brightness identification on each step in the grayscale value ladder according to the expected brightness value corresponding to each expected grayscale value, to obtain a brightness identification corresponding to each expected grayscale value;

[0017] S23: Generate the brightness range test signal according to the gray value ladder and the brightness identifier corresponding to each expected gray value.

[0018] Furthermore, the type of the gray value ladder is any one of a U-shaped gray value ladder, a circular gray value ladder, a horizontally arranged gray value ladder or a vertically arranged gray value ladder.

[0019] The technical solution of a display brightness range test system of the present invention is as follows:

[0020] Including: acquisition module, generation module, processing module and operation module;

[0021] The acquisition module is used to: acquire a target conversion table between an expected brightness value and an expected grayscale value of a display device to be tested;

[0022] The generating module is used to: generate a brightness range test signal according to the expected brightness value corresponding to each expected gray value in the target conversion table;

[0023] The processing module is used to: send the brightness range test signal to the display device to be tested for testing, obtain a target test screen of the display device to be tested, and obtain a maximum brightness value corresponding to a recognizable bright grayscale and a minimum brightness value corresponding to a recognizable dark grayscale from the target test screen;

[0024] The operation module is used to determine a target brightness range of the display device to be tested according to the maximum brightness value and the minimum brightness value.

[0025] Furthermore, the acquisition module is specifically used for:

[0026] The target conversion table between the expected brightness value and the expected grayscale value of the display device to be tested is obtained by using the PQ-OETF conversion function.

[0027] Furthermore, each expected grayscale value in the target conversion table corresponds to an expected brightness value; and the generating module is specifically used for:

[0028] Generating a grayscale value ladder according to each expected grayscale value in the target conversion table;

[0029] According to the expected brightness value corresponding to each expected gray value, each step in the gray value ladder is marked with brightness to obtain the brightness mark corresponding to each expected gray value;

[0030] The brightness range test signal is generated according to the gray value ladder and the brightness identifier corresponding to each expected gray value.

[0031] Furthermore, the type of the gray value ladder is any one of a U-shaped gray value ladder, a circular gray value ladder, a horizontally arranged gray value ladder or a vertically arranged gray value ladder.

[0032] The beneficial effects of a display brightness range test system of the present invention are as follows:

[0033] The display brightness range test system of the present invention has simple and reliable measurement results, efficient methods and low costs.

[0034] Based on the above solution, a display brightness range testing system of the present invention can also be improved as follows.

[0035] A technical solution of a storage medium of the present invention is as follows:

[0036] The storage medium stores instructions, and when a computer reads the instructions, the computer executes the steps of a display brightness range testing method of the present invention.

[0037] The technical solution of an electronic device of the present invention is as follows:

[0038] The invention comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the computer executes the steps of a display brightness range testing method according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic diagram of a flow chart of a display brightness range testing method according to an embodiment of the present invention;

[0040] Figure 2 A schematic diagram of a target display screen in a display brightness range testing method according to an embodiment of the present invention;

[0041] Figure 3 The figure is a schematic diagram of the structure of a display brightness range testing system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0042] like Figure 1 As shown, a display brightness range testing method according to an embodiment of the present invention comprises the following steps:

[0043] S1. Obtain a target conversion table between an expected brightness value and an expected grayscale value of a display device to be tested.

[0044] The display device to be tested is a conventional display device on the market, and there is no restriction here.

[0045] Among them, the expected brightness value is: multiple brightness values ​​of the display device to be tested obtained by the PQ-OETF conversion function. The brightness value is the brightness value under ideal conditions, and it is necessary to test it before determining whether it can be displayed normally on the corresponding device; the expected brightness value is: multiple grayscale values ​​of the display device to be tested obtained by the PQ-OETF conversion function.

[0046] Specifically, a PQ-OETF conversion function is used to form a conversion method between scene linear light and nonlinear signal values ​​(R, G, B), and through this conversion method, a correspondence table between expected brightness values ​​and expected grayscale values ​​is formed.

[0047] It should be noted that the PQ-OETF conversion function is a prior art and will not be described in detail here. In addition, when the bit depth of the test signal is 10 bits, the brightness value range is 0-10000, and the gray value range is 0-1023.

[0048] S2. Generate a brightness range test signal according to the expected brightness value corresponding to each expected grayscale value in the target conversion table.

[0049] The brightness range test signal is generated by inputting each expected gray value into a signal generation program respectively, and executing the signal generation program to generate the brightness range test signal.

[0050] Specifically, the target conversion table in this embodiment is shown in the following Table 1. Each expected brightness value corresponds to an expected grayscale value, and the expected grayscale value is selected from a wide range of grayscale values.

[0051] Table 1:

[0052] Expected brightness value Expected grayscale value (RGB) 0 0 0.2 85 0.4 111 0.6 128 0.8 142 1 153 2 193 4 238 6 267 8 289 10 298 40 429 80 497 100 520 200 592 400 668 600 712 800 744 1000 769 2000 846 4000 923 6000 968 8000 999 10000 1023

[0053] It should be noted that the signal generation program is a signal generation tool software written in C# language under the Windows platform, which is a prior art. In this embodiment, the signal generation program is not limited to the above program, and can also be implemented by programming in other languages ​​or using some existing tool software on the market to implement the signal, which is not limited here.

[0054] S3. Send the brightness range test signal to the display device to be tested for testing, obtain a target test screen of the display device to be tested, and obtain a maximum brightness value corresponding to a recognizable bright grayscale and a minimum brightness value corresponding to a recognizable dark grayscale from the target test screen.

[0055] The target test picture is a picture obtained by executing a brightness range test signal on the display device to be tested.

[0056] The recognizable light grayscale is a light grayscale that can be recognized in the target test picture; the recognizable dark grayscale is a dark grayscale that can be recognized in the target test picture.

[0057] It should be noted that the process of testing the display device to be tested with the brightness range test signal is: controlling the display device to be tested to display the brightness range test signal, and reading a corresponding identifiable brightness mark from the displayed image.

[0058] S4. Determine a target brightness range of the display device to be tested according to the maximum brightness value and the minimum brightness value.

[0059] Specifically, the maximum brightness value read from the target test screen is determined as the upper brightness limit value of the display device to be tested, and the minimum brightness value read from the target test screen is determined as the lower brightness limit value of the display device to be tested.

[0060] Preferably, each expected grayscale value in the target conversion table corresponds to an expected brightness value; S2 includes:

[0061] S21. Generate a grayscale value ladder according to each expected grayscale value in the target conversion table.

[0062] The grayscale value ladder is a grayscale value ladder generated according to the order of expected grayscale values ​​in the target conversion table and according to a preset grayscale value ladder type.

[0063] S22. According to the expected brightness value corresponding to each expected gray value, perform brightness identification on each step in the gray value ladder to obtain a brightness identification corresponding to each expected gray value.

[0064] The brightness mark is: the expected brightness value corresponding to each expected gray value marked on each gray value ladder. The specific schematic diagram of the brightness mark in the target test screen is as follows: Figure 2 shown.

[0065] S23: Generate the brightness range test signal according to the gray value ladder and the brightness identifier corresponding to each expected gray value.

[0066] It should be noted that the brightness test signal includes grayscale value steps and a brightness identifier of each step (expected grayscale value).

[0067] Preferably, the type of the gray value ladder is any one of a U-shaped gray value ladder, a circular gray value ladder, a horizontally arranged gray value ladder or a vertically arranged gray value ladder.

[0068] Specifically, in Figure 2In the target test screen of the display device to be tested, when the brightness value is 4000 and the grayscale value steps above the brightness, it is displayed in white and the steps cannot be seen clearly. Therefore, the maximum brightness value corresponding to the recognizable bright grayscale obtained from the target test screen is 4000; in the target test screen of the display device to be tested, the grayscale value steps with a brightness value of 0 can be clearly seen. Therefore, the minimum brightness value corresponding to the recognizable dark grayscale obtained from the target test screen is 0.

[0069] It should be noted that in addition to the U-shaped grayscale value ladder, various types of grayscale value ladders such as circular grayscale value ladders, horizontally arranged grayscale value ladders or vertically arranged grayscale value ladders can be generated according to each expected grayscale value in the target conversion table. As long as different grayscale values ​​can be filled into different positions to generate distinguishable images, it is not limited to the several types of grayscale value ladders listed above.

[0070] The technical solution of this embodiment has simple and reliable measurement results, efficient methods and low costs.

[0071] like Figure 3 As shown, a display brightness range test system 200 according to an embodiment of the present invention includes: an acquisition module 210, a generation module 220, a processing module 230 and an operation module 240;

[0072] The acquisition module 210 is used to: acquire a target conversion table between an expected brightness value and an expected grayscale value of the display device to be tested;

[0073] The generating module 220 is used to: generate a brightness range test signal according to the expected brightness value corresponding to each expected gray value in the target conversion table;

[0074] The processing module 230 is used to: send the brightness range test signal to the display device to be tested for testing, obtain a target test screen of the display device to be tested, and obtain a maximum brightness value corresponding to a recognizable bright grayscale and a minimum brightness value corresponding to a recognizable dark grayscale from the target test screen;

[0075] The operation module 240 is used to determine a target brightness range of the display device to be tested according to the maximum brightness value and the minimum brightness value.

[0076] Preferably, the acquisition module 210 is specifically used for:

[0077] The target conversion table between the expected brightness value and the expected grayscale value of the display device to be tested is obtained by using the PQ-OETF conversion function.

[0078] Preferably, each expected grayscale value in the target conversion table corresponds to an expected brightness value; the generating module 220 is specifically used for:

[0079] Generating a grayscale value ladder according to each expected grayscale value in the target conversion table;

[0080] According to the expected brightness value corresponding to each expected gray value, each step in the gray value ladder is marked with brightness to obtain the brightness mark corresponding to each expected gray value;

[0081] The brightness range test signal is generated according to the gray value ladder and the brightness identifier corresponding to each expected gray value.

[0082] Preferably, the type of the gray value ladder is any one of a U-shaped gray value ladder, a circular gray value ladder, a horizontally arranged gray value ladder or a vertically arranged gray value ladder.

[0083] The technical solution of this embodiment has simple and reliable measurement results, efficient methods and low costs.

[0084] The above parameters and steps for each module to implement corresponding functions in a display brightness range testing system 200 of this embodiment can refer to the parameters and steps in the embodiment of a display brightness range testing method above, and will not be repeated here.

[0085] A storage medium provided by an embodiment of the present invention includes: instructions are stored in the storage medium, and when a computer reads the instructions, the computer executes steps such as a display brightness range test method. For details, please refer to the parameters and steps in the embodiment of a display brightness range test method above, which will not be repeated here.

[0086] Computer storage media such as USB flash drives, mobile hard disks, etc.

[0087] An electronic device provided by an embodiment of the present invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the computer executes the steps of a display brightness range test method. For details, reference may be made to the parameters and steps in the embodiment of a display brightness range test method described above, which will not be elaborated here.

[0088] Those skilled in the art will appreciate that the present invention may be implemented as a method, a system, a storage medium, and an electronic device.

[0089] Therefore, the present invention can be specifically implemented in the following forms, that is, it can be complete hardware, it can be complete software (including firmware, resident software, microcode, etc.), or it can be a combination of hardware and software, which is generally referred to as "circuit", "module" or "system" herein. In addition, in some embodiments, the present invention can also be implemented in the form of a computer program product in one or more computer-readable media, and the computer-readable medium contains computer-readable program code. Any combination of one or more computer-readable media can be used. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to - an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media (a non-exhaustive list) include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this document, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in conjunction with an instruction execution system, apparatus, or device. Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be construed as limiting the present invention, and those skilled in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A display brightness range testing method, characterized in that: include: S1, obtaining a target conversion table between an expected brightness value and an expected grayscale value of a display device to be tested; S2, generating a brightness range test signal according to the expected brightness value corresponding to each expected gray value in the target conversion table; S3, sending the brightness range test signal to the display device to be tested for testing, obtaining a target test screen of the display device to be tested, and obtaining a maximum brightness value corresponding to a recognizable bright grayscale and a minimum brightness value corresponding to a recognizable dark grayscale from the target test screen; S4, determining a target brightness range of the display device to be tested according to the maximum brightness value and the minimum brightness value; Each expected grayscale value in the target conversion table corresponds to an expected brightness value; S2 includes: S21, generating a gray value ladder according to each expected gray value in the target conversion table; S22, performing brightness identification on each step in the grayscale value ladder according to the expected brightness value corresponding to each expected grayscale value, to obtain a brightness identification corresponding to each expected grayscale value; S23: Generate the brightness range test signal according to the gray value ladder and the brightness identifier corresponding to each expected gray value.

2. A display brightness range testing method according to claim 1, characterized in that: The S1 includes: The target conversion table between the expected brightness value and the expected grayscale value of the display device to be tested is obtained by using the PQ-OETF conversion function.

3. A display brightness range testing method according to claim 1, characterized in that: The type of the gray value ladder is any one of a U-shaped gray value ladder, a circular gray value ladder, a horizontally arranged gray value ladder, or a vertically arranged gray value ladder.

4. A display brightness range test system, characterized in that: include: Acquisition module, generation module, processing module and operation module; The acquisition module is used to: acquire a target conversion table between an expected brightness value and an expected grayscale value of a display device to be tested; The generating module is used to: generate a brightness range test signal according to the expected brightness value corresponding to each expected gray value in the target conversion table; The processing module is used to: send the brightness range test signal to the display device to be tested for testing, obtain a target test screen of the display device to be tested, and obtain a maximum brightness value corresponding to a recognizable bright grayscale and a minimum brightness value corresponding to a recognizable dark grayscale from the target test screen; The operation module is used to: determine the target brightness range of the display device to be tested according to the maximum brightness value and the minimum brightness value; Each expected grayscale value in the target conversion table corresponds to an expected brightness value; the generation module is specifically used for: Generating a grayscale value ladder according to each expected grayscale value in the target conversion table; According to the expected brightness value corresponding to each expected gray value, each step in the gray value ladder is marked with brightness to obtain the brightness mark corresponding to each expected gray value; The brightness range test signal is generated according to the gray value ladder and the brightness identifier corresponding to each expected gray value.

5. A display brightness range test system according to claim 4, characterized in that: The acquisition module is specifically used for: The target conversion table between the expected brightness value and the expected grayscale value of the display device to be tested is obtained by using the PQ-OETF conversion function.

6. A display brightness range test system according to claim 4, characterized in that: The type of the gray value ladder is any one of a U-shaped gray value ladder, a circular gray value ladder, a horizontally arranged gray value ladder, or a vertically arranged gray value ladder.

7. A storage medium, characterized in that: The storage medium stores instructions, and when a computer reads the instructions, the computer executes a display brightness range testing method as claimed in any one of claims 1 to 3.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the computer is caused to execute a display brightness range testing method according to any one of claims 1 to 3.

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