A crosstalk test method and system for a mobile phone display screen

Abstract

The application provides a crosstalk test method and system for a mobile phone display screen, steps 10: input a signal on the display screen to be tested to display a detection picture; step 20: use the detection picture to detect the crosstalk of the display screen to be tested; wherein the detection picture is provided with a cross-shaped detection white block in the center, the gray scale value of the cross-shaped detection white block is 256, and the background color gray scale value of the detection picture is 128. The cross-shaped detection white block is provided with multiple steps, and multiple white blocks with different proportions are used as the test picture at the same time. The multiple white blocks with different proportions are used as the test picture at the same time, which is beneficial to test the crosstalk degree change caused by different steps. Through the display picture, the influence of 1 / 2 and 1 / 3 white blocks on the upper and lower sides can be observed at the same time, and the 1 / 2 picture and the 1 / 3 picture do not need to be switched back and forth. The test efficiency is improved. It is also convenient to compare the difference in strictness between 1 / 2 and 1 / 3 white blocks.

Description

Technical Field

[0001] This invention relates to the field of display screen testing technology, and specifically to a crosstalk testing method and system for mobile phone displays. Background Technology

[0002] Crosstalk detection is a crucial step in TFT-LCD manufacturing. Only products that pass this test can leave the factory. If crosstalk is detected (i.e., display defects caused by crosstalk), design or process improvements are necessary to eliminate or reduce the crosstalk issue. In mobile phone LCD testing, crosstalk occurs when the TFT LCD cell's display switch cannot be completely turned off, causing the on / off state of one pixel to affect the display effect of another pixel.

[0003] In existing technologies, a common testing pattern for detecting crosstalk in liquid crystal display panels is a 127 grayscale background with a central white block, which can be either 1 / 3 or 1 / 2 white. The 1 / 2 white block, due to the larger number of white pixels in the center, has a greater impact on the top and bottom edges than the 1 / 3 white block, making it a more stringent method for crosstalk detection. Therefore, the testing process requires switching between the 1 / 2 and 1 / 3 white blocks.

[0004] All pixels in areas other than the white block have the same color and grayscale value. If, using this method, the brightness of the central horizontal (or vertical) area on the LCD panel is higher than that of other areas, it indicates that crosstalk exists in the LCD panel; otherwise, the LCD panel has good performance and no crosstalk exists.

[0005] Chinese patent "CN115002268A A method and system for testing crosstalk on a mobile phone display screen" reduces the false negative rate, but the testing efficiency is low. Summary of the Invention

[0006] This invention proposes a crosstalk testing method and system for mobile phone displays, which improves both testing efficiency and accuracy.

[0007] Specifically, one aspect proposes a crosstalk testing method for mobile phone displays, including:

[0008] Step 10: Input the signal onto the display screen to be tested to display the test screen;

[0009] Step 20: Perform crosstalk detection on the display screen under test using the test screen;

[0010] The detection screen features a cross-shaped white detection block at its center, with a grayscale value of 256, while the background color of the detection screen has a grayscale value of 128.

[0011] As a preferred technical solution, the cross-shaped detection white block is set with multiple steps, and multiple white blocks with different proportions are used as the test screen at the same time.

[0012] As a preferred technical solution, step 10 further includes:

[0013] Step 101: Input signals to the gate line and data line to display a first rectangular white detection block in the center area of ​​the detection screen;

[0014] Step 102: Input signals to the gate line and data line to display a second rectangular white detection block in the center area of ​​the detection screen;

[0015] Among them, the second rectangular white block overlaps with the first rectangular white block to form a second-order cross-shaped white block, and the length and width of the first rectangular white block and the second rectangular white block are different.

[0016] As a preferred technical solution, step 10 further includes:

[0017] Step 103: Input signals to the gate line and data line to display a third rectangular white detection block in the center area of ​​the detection screen;

[0018] Step 104: Overlay the third rectangular white detection block onto the second-order cross-shaped white detection block to form a third-order cross-shaped white detection block.

[0019] As a preferred technical solution, steps 103 and 104 are repeated multiple times to form an N-order cross-shaped detection white block.

[0020] As a preferred technical solution, the first rectangular white block, the second rectangular white block, and the third rectangular white block are rectangular blocks arranged vertically.

[0021] As a preferred technical solution, the length of the first rectangular white block is 1 / 2 of the length of the display screen, and the width of the first rectangular white block is 1 / 2 of the width of the display screen.

[0022] As a preferred technical solution, the width of the second rectangular detection white block is 1 / 3 of the width of the display screen.

[0023] As a preferred technical solution, the width of the third rectangular white block is smaller than the width of the second rectangular white block, and the length of the third rectangular white block is greater than the length of the second rectangular white block.

[0024] On the other hand, a crosstalk testing system for mobile phone displays is also proposed, which utilizes the testing method described above. The system includes: a display screen under test, a signal unit, and a control unit.

[0025] The signal unit is used to input electrical signals to the gate lines and data lines of the display screen under test in order to drive the display screen under test to display.

[0026] The control unit is used to set the central area of ​​the display screen under test as a cross-shaped detection white block; wherein, the cross-shaped detection white block is set to include multiple steps, with multiple white blocks of different proportions serving as the test screen at the same time.

[0027] The present invention achieves the following technical effects compared to the prior art:

[0028] (1) A cross-shaped white detection block is set in the center of the detection screen. The grayscale value of the cross-shaped white detection block is 256, and the grayscale value of the background color of the detection screen is 128. The cross-shaped white detection block has multiple steps, and multiple white blocks with different proportions are used as the test screen at the same time. Using multiple white blocks with different proportions as the test screen at the same time is beneficial to testing the changes in crosstalk caused by different steps.

[0029] (2) This single display allows for simultaneous observation of the effects of the 1 / 2 and 1 / 3 white blocks on the upper and lower surfaces, eliminating the need to switch between the 1 / 2 and 1 / 3 screens. This speeds up testing efficiency and facilitates comparison of the stringency differences between the 1 / 2 and 1 / 3 white blocks. The crosshairs provide a direct visual indication of the specific stringency level and the severity of crosstalk defects, making it easier for process engineers to detect crosstalk issues on mobile phone displays and reducing the false negative rate.

[0030] Other features and advantages of this application will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing this application. Attached image description:

[0031] Figure 1 This is a schematic diagram of a crosstalk testing method for a mobile phone display screen according to Embodiment 1 of the present invention. Figure 1 ;

[0032] Figure 2 This is a schematic diagram of a crosstalk testing method for a mobile phone display screen according to Embodiment 1 of the present invention. Figure 2 ;

[0033] Figure 3 This is a schematic diagram of a crosstalk testing method for a mobile phone display screen according to Embodiment 1 of the present invention. Figure 3 ;

[0034] Figure 4 This is a schematic diagram of the detection screen proposed in Embodiment 1 of the present invention;

[0035] Figure 5 This is a schematic diagram of a crosstalk testing system for a mobile phone display screen proposed in Embodiment 2 of the present invention.

[0036] Explanation of reference numerals in the attached figures:

[0037] Cross-shaped detection of white block 10; First rectangle detection of white block 101; Second rectangle detection of white block 102; Third rectangle detection of white block 103;

[0038] The display screen under test is 20; the signal unit is 30; and the control unit is 40. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. In the description of this invention, it should be noted that the term "or" is generally used to include the meaning of "and / or," unless otherwise expressly indicated.

[0040] It should be understood that the steps described in the method embodiments of this application may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this application is not limited in this respect.

[0041] The term "comprising" and its variations as used in this invention are open-ended, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the description below.

[0042] It should be noted that the terms "one" and "multiple" used in this application are illustrative rather than restrictive, and those skilled in the art should understand that, unless explicitly stated otherwise in the context, they should be interpreted as "one or more". "Multiple" should be understood as two or more.

[0043] Example 1

[0044] like Figure 1-3 As shown, this is a crosstalk testing method for a mobile phone display screen proposed in an embodiment of the present invention.

[0045] Specifically, it includes:

[0046] Step 10: Input a signal onto the display screen 20 to display the test screen;

[0047] Step 20: Perform crosstalk detection on the display screen 20 under test using the test screen;

[0048] The detection screen has a cross-shaped white detection block 10 in the center, with a grayscale value of 256, and the background grayscale value of the detection screen is 128.

[0049] Preferred, such as Figure 4 As shown, the cross-shaped white detection block 10 has multiple steps, using multiple white blocks of different proportions as the test screen simultaneously. Using multiple white blocks of different proportions as the test screen simultaneously is beneficial for testing the changes in crosstalk caused by different steps.

[0050] like Figure 2 As shown, preferably, step 10 further includes:

[0051] Step 101: Input signals to the gate line and data line to display the first rectangular white detection block 101 in the center area of ​​the detection screen;

[0052] Step 102: Input signals to the gate line and data line to display the second rectangular white detection block 102 in the center area of ​​the detection screen;

[0053] Among them, the second rectangular white detection block 102 overlaps with the first rectangular white detection block 101 to form a second-order cross-shaped white detection block 10, and the length and width of the first rectangular white detection block 101 and the second rectangular white detection block 102 are different.

[0054] like Figure 3 As shown, preferably, step 10 further includes:

[0055] Step 103: Input signals to the gate line and data line to display the third rectangular white detection block 103 in the center area of ​​the detection screen;

[0056] Step 104: Overlay the third rectangular white detection block 103 onto the second-order cross-shaped white detection block 10 to form a third-order cross-shaped white detection block 10.

[0057] Preferably, steps 103 and 104 are repeated multiple times to form an N-order cross-shaped detection white block 10.

[0058] For the best options, please continue to refer to them. Figure 2 The first rectangular white block 101, the second rectangular white block 102, and the third rectangular white block 103 are rectangular blocks arranged vertically.

[0059] Preferably, the length of the first rectangular white detection block 101 is half the length of the display screen, and the width of the first rectangular white detection block 101 is half the width of the display screen.

[0060] Preferably, the width of the second rectangular detection white block 102 is 1 / 3 of the width of the display screen.

[0061] Preferably, the width of the third rectangular white block 103 is smaller than the width of the second rectangular white block 102, and the length of the third rectangular white block 103 is greater than the length of the second rectangular white block 102.

[0062] This single display allows for simultaneous observation of the effects of the 1 / 2 and 1 / 3 white blocks on the upper and lower surfaces, eliminating the need to switch back and forth between the 1 / 2 and 1 / 3 screens. This speeds up testing efficiency and facilitates comparison of the stringency differences between the 1 / 2 and 1 / 3 white blocks. The crosshairs provide a direct visual indication of the specific stringency level and the severity of crosstalk defects, making it easier for process engineers to detect crosstalk issues on mobile phone displays and reducing the false negative rate.

[0063] Example 2

[0064] like Figure 5 As shown, this embodiment proposes a crosstalk testing system for a mobile phone display screen. It utilizes the testing method described in Embodiment 1. Specifically, the system includes: a display screen under test 20, a signal unit 30, and a control unit 40.

[0065] The signal unit 30 is used to input electrical signals to the gate line and data line of the display screen 20 under test in order to drive the display screen 20 under test to display.

[0066] The control unit 40 is used to set the center area of ​​the display screen 20 under test as a cross-shaped detection white block 10.

[0067] The cross-shaped white detection block 10 is configured to include multiple steps, with multiple white blocks of different proportions simultaneously serving as the test image. The grayscale value of the cross-shaped white detection block 10 is 256, and the grayscale value of the background color of the detection image is 128. Using multiple white blocks of different proportions simultaneously as the test image is beneficial for testing the changes in crosstalk caused by different steps.

[0068] like Figure 4 As shown, the second rectangular white detection block 102 overlaps with the first rectangular white detection block 101 to form a second-order cross-shaped white detection block 10. The length and width of the first rectangular white detection block 101 and the second rectangular white detection block 102 are different.

[0069] The length of the first rectangular white detection block 101 is half the length of the display screen, and the width of the first rectangular white detection block 101 is half the width of the display screen. The width of the second rectangular white detection block 102 is one-third the width of the display screen.

[0070] Preferably, the width of the third rectangular white block 103 is smaller than the width of the second rectangular white block 102, and the length of the third rectangular white block 103 is greater than the length of the second rectangular white block 102.

[0071] This single display allows for simultaneous observation of the effects of the 1 / 2 and 1 / 3 white blocks on the upper and lower surfaces, eliminating the need to switch back and forth between the 1 / 2 and 1 / 3 screens. This speeds up testing efficiency and facilitates comparison of the stringency differences between the 1 / 2 and 1 / 3 white blocks. The crosshairs provide a direct visual indication of the specific stringency level and the severity of crosstalk defects, making it easier for process engineers to detect crosstalk issues on mobile phone displays and reducing the false negative rate.

[0072] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. A crosstalk testing method for a mobile phone display screen, characterized in that, include: Step 10: Input the signal onto the display screen to be tested to display the test screen; Step 20: Perform crosstalk detection on the display screen under test using the detection screen; The detection screen has a cross-shaped white detection block in the center, the grayscale value of the cross-shaped white detection block is 256, and the grayscale value of the background color of the detection screen is 128. Step 10 also includes: Step 101: Input signals to the gate line and data line to display a first rectangular white detection block in the center area of ​​the detection screen; Step 102: Input signals to the gate line and data line to display a second rectangular white detection block in the center area of ​​the detection screen; Step 103: Input signals to the gate line and data line to display a third rectangular white detection block in the center area of ​​the detection screen; Step 104: Overlay the third rectangular white detection block onto the second-order cross-shaped white detection block to form a third-order cross-shaped white detection block; Wherein, the second rectangular white block overlaps with the first rectangular white block to form a second-order cross-shaped white block, and the length and width of the first rectangular white block and the second rectangular white block are different; The first rectangular white block, the second rectangular white block, and the third rectangular white block are rectangular blocks arranged vertically. The length of the first rectangular white detection block is 1 / 2 of the length of the display screen, and the width of the first rectangular white detection block is 1 / 2 of the width of the display screen; the width of the second rectangular white detection block is 1 / 3 of the width of the display screen.

2. The crosstalk testing method for a mobile phone display screen according to claim 1, characterized in that, The cross-shaped detection white block is equipped with multiple steps, and multiple white blocks with different proportions are used as the test screen at the same time.

3. The crosstalk testing method for a mobile phone display screen according to claim 1, characterized in that, Steps 103 and 104 are repeated multiple times to form an N-order cross-shaped white detection block.

4. The crosstalk testing method for a mobile phone display screen according to claim 3, characterized in that, The width of the third rectangular white block is smaller than the width of the second rectangular white block, and the length of the third rectangular white block is greater than the length of the second rectangular white block.

5. A crosstalk testing system for a mobile phone display screen, utilizing the testing method according to any one of claims 1-4, characterized in that, include: The display screen, signal unit, and control unit under test; The signal unit is used to input electrical signals to the gate lines and data lines of the display screen under test to drive the display screen under test to display. The control unit is used to set the central area of ​​the display screen under test as a cross-shaped white detection block; The cross-shaped detection white block is designed to include multiple steps, with multiple white blocks of different proportions serving as the test screen simultaneously.

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