CN109036231B - Display panel detection method and display panel auxiliary detection device - Google Patents
Display panel detection method and display panel auxiliary detection device Download PDFInfo
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- CN109036231B CN109036231B CN201810854424.2A CN201810854424A CN109036231B CN 109036231 B CN109036231 B CN 109036231B CN 201810854424 A CN201810854424 A CN 201810854424A CN 109036231 B CN109036231 B CN 109036231B
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
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- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
Abstract
The invention provides a display panel detection method and a display panel auxiliary detection device. According to the display panel detection method, the detection pictures of the high-resolution display panel are obtained by splicing the plurality of low-resolution sub-detection pictures, the detection pictures displayed by the display panel are moved by the display panel auxiliary detection device, the smoothness of gray scale transition of any area of the high-resolution display panel can be detected through the low-resolution pictures, the detection effect of the display panel is improved, and the detection cost of the display panel is reduced.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel detection method and a display panel auxiliary detection device.
Background
With the development of Display technology, flat panel Display devices such as Liquid Crystal Displays (LCDs) have advantages of high image quality, power saving, thin body, and wide application range, and thus are widely used in various consumer electronics products such as mobile phones, televisions, personal digital assistants, digital cameras, notebook computers, and desktop computers, and become the mainstream of Display devices.
Most of the existing liquid crystal display devices in the market are backlight liquid crystal displays (lcds), which include a liquid crystal display panel and a backlight module (backlight module). The liquid crystal display panel comprises a plurality of sub-pixels arranged in an array manner, each sub-pixel is electrically connected with a Thin Film Transistor (TFT), a grid electrode (Gate) of the TFT is connected to a scanning line in the horizontal direction, a Drain electrode (Drain) is connected to a data line in the vertical direction, and a Source electrode (Source) is connected to a pixel electrode. Scanning signals are input to the scanning lines through the grid driver, all the TFTs electrically connected to the scanning lines are turned on, and therefore data signals input to the data lines through the data driver can be written into pixels, the transmittance of liquid crystals is controlled, and the display effect is achieved.
Generally, a Liquid Crystal display panel is composed of a Color Filter substrate (CF), a Thin Film Transistor substrate (TFT), a Liquid Crystal (LC) sandwiched between the Color Filter substrate and the Thin Film Transistor substrate, and a Sealant (Sealant), and a forming process of the Liquid Crystal display panel generally includes: front Array (Array) process (thin film, yellow light, etching and stripping), middle Cell (TFT substrate and CF substrate) process and back module assembly process (driver IC and printed circuit board lamination). Wherein, the front-stage Array process mainly forms a TFT substrate to control the movement of liquid crystal molecules; the middle Cell process is mainly to add liquid crystal between the TFT substrate and the CF substrate; the back module assembly process mainly drives the integration of IC pressing and printed circuit board, and further drives the liquid crystal molecules to rotate and display images.
With the continuous development of display technologies, various large manufacturers are developing new display panels with better display effects, and after the development of the new display panels is completed, the display effects of the display panels need to be detected, in the existing detection method, a detection picture is generally input into the display panels to judge whether gray scale transition of each area of the display panels is smooth, but with the continuous improvement of the resolution of the display panels, in high-resolution display panels such as 8K4K display panels and the like, because a high-resolution signal source is relatively short and expensive, a plurality of low-resolution sub-detection pictures are spliced to obtain a detection picture of the high-resolution display panels, and at this time, because whether the gray scale at the spliced part is smooth cannot be detected, the detection is incomplete.
Disclosure of Invention
The invention aims to provide a display panel detection method, which can detect the smoothness of gray scale transition of any area of a high-resolution display panel through a low-resolution picture, improve the detection effect of the display panel and reduce the detection cost of the display panel.
The present invention is also directed to a display panel detection apparatus, which can detect the smoothness of gray scale transition in any area of a high-resolution display panel through a low-resolution image, thereby improving the detection effect of the display panel and reducing the detection cost of the display panel.
In order to achieve the above object, the present invention provides a display panel detection method, including the following steps:
step S1, providing a display panel auxiliary detection device and a display panel, where the display panel auxiliary detection device includes an input unit and a processing unit electrically connected to the input unit, and the processing unit is electrically connected to the display panel;
step S2, the display panel displays a detection picture, the detection picture comprises a plurality of sub-detection pictures spliced with each other, a splicing line between adjacent sub-detection pictures is located in a first area, and the resolution of each sub-detection picture is smaller than that of the display panel;
step S3, detecting the smoothness of gray scale transition of a second area of the display panel except the first area;
step S4, the input unit provides a displacement signal to the processing unit, and the processing unit moves the detection pictures according to the displacement signal, so that the splicing lines between every two adjacent sub-detection pictures move to a second area;
step S5, detecting smoothness of gray scale transition of the first region of the display panel.
The detection picture comprises four sub-detection pictures distributed in a shape like a Chinese character 'tian', and the first area is located in an area where a horizontal center line and a vertical center line of the display panel are located.
The displacement signal includes a lateral movement distance of the detection picture and a longitudinal movement distance of the detection picture.
The input unit comprises a plurality of keys electrically connected with the processing unit, and the displacement signals are input to the processing unit through the keys.
The processing unit comprises a processing chip and a memory electrically connected with the processing chip;
the memory stores display data of the sub-detection picture;
and the processing chip calculates first position information according to the displacement signal, reads display data from the memory according to the first position information and drives the display panel to display so as to realize the movement of the detection picture, wherein the first position information is the position of the initial pixel point of the display panel in the sub-detection picture where the initial pixel point is located after the detection picture is moved.
The invention also provides a display panel auxiliary detection device, which comprises an input unit and a processing unit electrically connected with the input unit, wherein the processing unit is electrically connected with the display panel;
the display panel is used for displaying a detection picture, the detection picture comprises a plurality of sub-detection pictures which are spliced with each other, a splicing line between adjacent sub-detection pictures is positioned in a first area, and the resolution ratio of each sub-detection picture is smaller than that of the display panel;
the input unit is used for providing a displacement signal to the processing unit;
the processing unit is used for moving the detection pictures according to the displacement signals so that the splicing lines between every two adjacent sub-detection pictures move to a second area except the first area;
during detection, before the detection picture moves, the smoothness of gray scale transition of the second area in the display panel is detected, and after the detection picture moves, the smoothness of gray scale transition of the first area is detected.
The detection picture comprises four sub-detection pictures distributed in a shape like a Chinese character 'tian', and the first area is located in an area where a horizontal center line and a vertical center line of the display panel are located.
The displacement signal comprises the transverse moving distance of the detection picture and the longitudinal moving distance of the detection picture;
the input unit comprises a plurality of keys electrically connected with the processing unit, and the displacement signals are input to the processing unit through the keys.
The processing unit comprises a processing chip and a memory electrically connected with the processing chip;
the memory is used for storing the display data of the sub-detection picture;
the processing chip is used for calculating to obtain first position information according to the displacement signal, reading display data from the memory according to the first position information and driving the display panel to display so as to realize the movement of the detection picture, and the first position information is the position of an initial pixel point of the display panel in the sub-detection picture where the initial pixel point is located after the detection picture is moved.
The invention has the beneficial effects that: the invention provides a display panel detection method, which is characterized in that a detection picture of a high-resolution display panel is obtained by splicing a plurality of low-resolution sub-detection pictures, and the detection picture displayed by the display panel is moved by a display panel auxiliary detection device, so that the smoothness of gray scale transition of any area of the high-resolution display panel can be detected by the low-resolution pictures, the detection effect of the display panel is improved, and the detection cost of the display panel is reduced. The invention also provides an auxiliary detection device for the display panel, which can detect the smoothness of gray scale transition of any area of the high-resolution display panel through the low-resolution picture, improve the detection effect of the display panel and reduce the detection cost of the display panel.
Drawings
For a better understanding of the nature and technical aspects of the present invention, reference should be made to the following detailed description of the invention, taken in conjunction with the accompanying drawings, which are provided for purposes of illustration and description and are not intended to limit the invention.
In the drawings, there is shown in the drawings,
FIG. 1 is a diagram of a step S1 of the display panel inspection method of the present invention and an auxiliary inspection apparatus of the display panel of the present invention;
FIG. 2 is a schematic diagram of steps S2 and S3 of the display panel detection method of the present invention;
FIG. 3 is a schematic diagram of steps S4 and S5 of the display panel detection method of the present invention;
FIG. 4 is a flowchart illustrating a method for detecting a display panel according to the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Referring to fig. 4, the present invention provides a method for detecting a display panel, including the following steps:
step S1, providing a display panel auxiliary detection device and a display panel 30, where the display panel auxiliary detection device includes an input unit 10 and a processing unit 20 electrically connected to the input unit 10, and the processing unit 20 is electrically connected to the display panel 30.
Specifically, in the preferred embodiment of the present invention, the resolution of the display panel 30 is 8K4K, i.e. 7630 × 4320.
Specifically, the input unit 10 includes a plurality of keys 11, the processing unit 20 includes a processing chip 21 and a memory 22 electrically connected to the processing chip 21, and the processing chip 21 is electrically connected to the display panel 30.
Preferably, the processing chip 21 is a Field-Programmable Gate Array (FPGA) chip.
Step S2, the display panel 30 displays a detection picture 100, where the detection picture includes a plurality of sub-detection pictures 101 spliced with each other, a splicing line between adjacent sub-detection pictures 101 is located in the first area 201, and a resolution of each sub-detection picture is smaller than a resolution of the display panel.
Specifically, as shown in fig. 2, in a preferred embodiment of the present invention, the resolution of the sub-inspection screen is 4K2K, that is, 3840 × 2160, the inspection screen includes four sub-inspection screens 101 distributed in a shape like a Chinese character tian, the first area 201 is located in an area where a horizontal center line and a vertical center line of the display panel 30 are located, and as shown in fig. 2, the four sub-inspection screens 101 are a sub-inspection screen a, a sub-inspection screen B, a sub-inspection screen C, and a sub-inspection screen D, respectively.
Specifically, the four sub-detection frames 101 are driven by the same display data, which are stored in the memory 22, to display the same pattern.
Of course, in other embodiments of the present invention, the resolution of the sub-detection picture may also be 2K1K, i.e. 1920 × 1080, and the detection picture includes 16 sub-detection pictures 101 distributed in 4 rows and 4 columns.
Step S3, detecting the smoothness of the gray level transition of the second region 202 of the display panel 30 except the first region 201.
Specifically, the step S3 may detect the smoothness of the gray scale transition of the second region 202 of the display panel 30 through direct observation by human eyes, or may detect the smoothness of the gray scale transition of the second region 202 of the display panel 30 through an optical detection Device such as a Charge-coupled Device (CCD), so as to improve the detection accuracy.
Step S4, the input unit 10 provides a displacement signal to the processing unit 20, and the processing unit 20 moves the detection picture 100 according to the displacement signal, so that the splicing line between each adjacent sub-detection pictures 101 moves to the second area 202.
Specifically, a displacement signal including a lateral movement distance of the detection screen 100 and a longitudinal movement distance of the detection screen 100 is input to the processing unit 20 through the key 11.
The memory 22 stores the display data of the sub-detection screen 101; the processing chip 21 calculates first position information according to the displacement signal, and reads display data from the memory 22 according to the first position information to drive the display panel to display, so as to realize the movement of the detection picture 100, where the first position information is a position where an initial pixel point of the display panel 30 is located in the sub-detection picture 101 where the initial pixel point is located after the detection picture 100 moves.
For example, as shown in fig. 3, in the preferred embodiment of the present invention, by inputting a displacement signal to the processing unit 20 through the key 11, the lateral movement distance of the detection picture 100 in the displacement signal is X0 pixels and the longitudinal movement distance of the detection picture 100 is Y0 pixels, one sub detection picture comprises X columns and Y rows of pixels, the initial pixel point is the pixel point at the upper left corner of the display panel 10, and the processing chip 21 calculates that the first position information is the line Y-Y0 of the X-X0, that is, the initial pixel point is located at the line Y-Y0 of the X-X0 of the sub-detection picture, then, the processing chip 21 starts data reading from the display data of the X-X0 column and Y-Y0 row of the sub inspection scene of the memory 22 to complete the movement of the inspection scene 100.
Further, as shown in fig. 3, after the movement, the sub inspection picture a is moved to the right by X0 pixels, and is moved to the down by Y0 pixels, the sub inspection picture C becomes two parts, C1 and C2, which are located at the left and right sides of the sub inspection picture a, the sub inspection picture B becomes two parts, B1 and B2, which are located at the upper and lower sides of the sub inspection picture a, and the sub inspection picture D becomes four parts, D1 to D4, which are located at the four corners of the display panel 10, and at this time, the joint line between the adjacent sub inspection pictures 101 is no longer located in the first area 201.
Step S5 detects the smoothness of the gray-scale transition in the first region 201 of the display panel 30.
Specifically, the step S5 may detect the smoothness of the gray level transition of the first region 201 by direct observation of human eyes, or may detect the smoothness of the gray level transition of the first region 201 by an optical detection Device such as a Charge-coupled Device (CCD), so as to improve the detection accuracy.
Referring to fig. 1, the present invention provides an auxiliary detection device for a display panel, including an input unit 10 and a processing unit 20 electrically connected to the input unit 10, wherein the processing unit 20 is electrically connected to a display panel 30;
the display panel 30 is configured to display a detection picture 100, where the detection picture 100 includes a plurality of sub-detection pictures 101 that are spliced with each other, a splicing line between adjacent sub-detection pictures 101 is located in a first area 201, and a resolution of each sub-detection picture is smaller than a resolution of the display panel.
Specifically, in the preferred embodiment of the present invention, the resolution of the display panel 30 is 8K4K, i.e., 7630 × 4320.
Specifically, the input unit 10 includes a plurality of keys 11, the processing unit 20 includes a processing chip 21 and a memory 22 electrically connected to the processing chip 21, and the processing chip 21 is electrically connected to the display panel 30.
Preferably, the processing chip 21 is an FPGA chip.
Specifically, as shown in fig. 2, in a preferred embodiment of the present invention, the resolution of the sub-inspection screen is 4K2K, that is, 3840 × 2160, the inspection screen includes four sub-inspection screens 101 distributed in a shape like a Chinese character tian, the first area 201 is located in an area where a horizontal center line and a vertical center line of the display panel 30 are located, and as shown in fig. 2, the four sub-inspection screens 101 are a sub-inspection screen a, a sub-inspection screen B, a sub-inspection screen C, and a sub-inspection screen D, respectively.
Specifically, the four sub-detection frames 101 are driven by the same display data, which are stored in the memory 22, to display the same pattern.
Of course, in other embodiments of the present invention, the resolution of the sub-detection picture may also be 2K1K, i.e. 1920 × 1080, and the detection picture includes 16 sub-detection pictures 101 distributed in 4 rows and 4 columns.
The input unit 10 is used to provide displacement signals to the processing unit 20.
The processing unit 20 is configured to move the detection picture 100 according to the displacement signal, so that a splicing line between each adjacent sub-detection pictures 101 moves to a second area 202 except the first area 201.
Specifically, a displacement signal including a lateral movement distance of the detection screen 100 and a longitudinal movement distance of the detection screen 100 is input to the processing unit 20 through the key 11.
The memory 22 stores the display data of the sub-detection screen 101; the processing chip 21 calculates first position information according to the displacement signal, and reads display data from the memory 22 according to the first position information to drive the display panel to display, so as to realize the movement of the detection picture 100, where the first position information is a position where an initial pixel point of the display panel 30 is located in the sub-detection picture 101 where the initial pixel point is located after the detection picture 100 moves.
For example, as shown in fig. 3, in the preferred embodiment of the present invention, by inputting a displacement signal to the processing unit 20 through the key 11, the lateral movement distance of the detection picture 100 in the displacement signal is X0 pixels and the longitudinal movement distance of the detection picture 100 is Y0 pixels, one sub detection picture comprises X columns and Y rows of pixels, the initial pixel point is the pixel point at the upper left corner of the display panel 10, the processing chip 21 calculates that the first position information is the line Y-Y0 of the X-X0, that is, the initial pixel point is located at the line Y-Y0 of the X-X0 of the sub-detection picture, then, the processing chip 21 starts data reading from the display data of the X-X0 column and Y-Y0 row of the sub inspection scene of the memory 22 to complete the movement of the inspection scene 100.
Further, as shown in fig. 3, after the movement, the sub inspection picture a is moved to the right by X0 pixels, and is moved to the down by Y0 pixels, the sub inspection picture C becomes two parts, C1 and C2, which are located at the left and right sides of the sub inspection picture a, the sub inspection picture B becomes two parts, B1 and B2, which are located at the upper and lower sides of the sub inspection picture a, and the sub inspection picture D becomes four parts, D1 to D4, which are located at the four corners of the display panel 10, and at this time, the joint line between the adjacent sub inspection pictures 101 is no longer located in the first area 201.
In the detection, the smoothness of the gradation transition in the second region 202 of the display panel 30 is detected before the detection screen 100 is moved, and the smoothness of the gradation transition in the first region 201 is detected after the detection screen 100 is moved, so that the smoothness of the gradation transition in any region of the display panel 10 can be detected by controlling the movement position of the detection screen 100.
Specifically, the smoothness of the gray level transition of the display panel 30 can be detected by direct observation of human eyes, and the smoothness of the gray level transition of the display panel 30 can also be detected by an optical detection Device such as a Charge-coupled Device (CCD), so as to improve the detection accuracy.
In summary, the present invention provides a display panel detection method, in which a plurality of low-resolution sub-detection pictures are spliced to obtain a detection picture of a high-resolution display panel, and a display panel auxiliary detection device moves the detection picture displayed by the display panel, so that the detection of the smoothness of gray scale transition in any area of the high-resolution display panel by the low-resolution picture can be achieved, the detection effect of the display panel is improved, and the detection cost of the display panel is reduced. The invention also provides an auxiliary detection device for the display panel, which can detect the smoothness of gray scale transition of any area of the high-resolution display panel through the low-resolution picture, improve the detection effect of the display panel and reduce the detection cost of the display panel.
As described above, it will be apparent to those skilled in the art that other various changes and modifications may be made based on the technical solution and concept of the present invention, and all such changes and modifications are intended to fall within the scope of the appended claims.
Claims (10)
1. A display panel detection method is characterized by comprising the following steps:
step S1, providing a display panel auxiliary detection device and a display panel (30), where the display panel auxiliary detection device includes an input unit (10) and a processing unit (20) electrically connected to the input unit (10), and the processing unit (20) is electrically connected to the display panel (30);
step S2, the display panel (30) displays a detection picture (100), the detection picture (100) comprises a plurality of sub-detection pictures (101) which are spliced with each other, a splicing line between adjacent sub-detection pictures (101) is located in a first area (201), and the resolution of each sub-detection picture (101) is smaller than that of the display panel (30);
step S3, detecting the smoothness of gray scale transition of a second area (202) of the display panel (30) except the first area (201);
step S4, the input unit (10) provides a displacement signal to the processing unit (20), and the processing unit (20) moves the detection pictures (100) according to the displacement signal, so that the splicing lines between the adjacent sub-detection pictures (101) move to the second area (202);
step S5, detecting smoothness of gray scale transition of the first area (201) of the display panel (30).
2. The method as claimed in claim 1, wherein the detection frame (100) comprises four sub-detection frames (101) distributed in a shape of Chinese character tian, and the first region (201) is located in a region where a horizontal center line and a vertical center line of the display panel (30) are located.
3. The display panel detection method according to claim 1, wherein the displacement signal includes a lateral movement distance of the detection screen (100) and a longitudinal movement distance of the detection screen (100).
4. The method as claimed in claim 1, wherein the input unit (10) comprises a plurality of keys (11) electrically connected to the processing unit (20), and the displacement signal is input to the processing unit (20) through the plurality of keys (11).
5. The method for inspecting a display panel according to claim 1, wherein the processing unit (20) comprises a processing chip (21) and a memory (22) electrically connected to the processing chip (21);
the memory (22) stores the display data of the sub detection picture (101);
the processing chip (21) calculates first position information according to the displacement signal, reads display data from the memory (22) according to the first position information to drive the display panel (30) to display so as to realize the movement of the detection picture (100), and the first position information is the position of an initial pixel point of the display panel (30) in the sub detection picture (101) where the initial pixel point is located after the detection picture (100) moves.
6. The auxiliary detection device for the display panel is characterized by comprising an input unit (10) and a processing unit (20) electrically connected with the input unit (10), wherein the processing unit (20) is electrically connected with a display panel (30);
the display panel (30) is used for displaying a detection picture (100), the detection picture (100) comprises a plurality of sub-detection pictures (101) which are spliced with each other, a splicing line between adjacent sub-detection pictures (101) is positioned in a first area (201), and the resolution of each sub-detection picture (101) is smaller than that of the display panel (30);
the input unit (10) is used for providing a displacement signal to the processing unit (20);
the processing unit (20) is used for moving the detection pictures (100) according to the displacement signals, so that splicing lines between every two adjacent sub detection pictures (101) move to a second area (202) except the first area (201);
during detection, the smoothness of the gray level transition of the second region (202) in the display panel (30) is detected before the detection screen (100) moves, and the smoothness of the gray level transition of the first region (201) is detected after the detection screen (100) moves.
7. The auxiliary detection device for the display panel according to claim 6, wherein the detection frame (100) comprises four sub-detection frames (101) distributed in a shape like a Chinese character 'tian', and the first region (201) is located in a region where a horizontal center line and a vertical center line of the display panel (30) are located.
8. The auxiliary detection device of claim 6, wherein the displacement signal comprises a lateral movement distance of the detection screen (100) and a longitudinal movement distance of the detection screen.
9. The auxiliary detecting device of claim 6, wherein the input unit (10) comprises a plurality of keys (11) electrically connected to the processing unit (20), and the displacement signal is input to the processing unit (20) through the plurality of keys (11).
10. The auxiliary detecting device of claim 6, wherein the processing unit (20) comprises a processing chip (21) and a memory (22) electrically connected to the processing chip (21);
the memory (22) is used for storing display data of the sub detection picture (101);
the processing chip (21) is configured to calculate first position information according to a displacement signal, and read display data from the memory (22) according to the first position information to drive the display panel (30) to display so as to move the detection picture (100), where the first position information is a position where an initial pixel point of the display panel (30) is located in a sub-detection picture (101) where the initial pixel point is located after the detection picture (100) moves.
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