Electrical testing method and device for liquid crystal display panel

Abstract

The invention discloses an electrical testing method and device for a liquid crystal display panel, and the method comprises the steps: providing an array circuit which comprises a plurality of groups of gate lines, a plurality of pixel units and a plurality of data lines, the different pixels of the plurality of pixel units are sequentially and longitudinally arranged, and the same pixels of the plurality of pixel units are sequentially and transversely arranged; and driving one group of the plurality of groups of gate lines and the corresponding data lines, writing data into the same type of pixels of all rows connected with the group of gate lines, displaying a test picture, setting the gate lines of the rest groups as low levels, and driving the gate lines of the rest groups and the corresponding data lines until all types of electrical test pictures are tested. The electric measurement of three pure color pictures is realized, a liquid crystal display panel NG product is prevented from entering a subsequent process, and the problem that red, green and blue electric measurement pure color pictures cannot be displayed is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical testing of display panels, and in particular to an electrical testing method and device for a liquid crystal display panel. Background Art

[0002] Liquid crystal display panels have been widely used in modern society. At present, the image display of liquid crystal display panels is mainly completed through the timing control module and the glass substrate under the control of the backlight module. The backlight module controls the light through the color filter by adjusting the brightness of the lamp beads to achieve different color effects. Thin film transistor liquid crystal display (TFT-LCD) has become the mainstream in the display field due to its advantages of lightness, energy saving, high display quality and mature and stable manufacturing process.

[0003] The liquid crystal display panel mainly includes an array substrate, a color substrate and a liquid crystal layer. The array substrate and the color substrate sandwich the liquid crystal layer in the middle. Scan lines, data lines, pixel electrodes and thin film transistors are formed on the array substrate. Common electrodes are formed on the color film substrate. The pixel electrodes and corresponding common electrodes constitute pixels.

[0004] Currently, when testing liquid crystal display panels, the existing electrical testing fixtures cannot achieve multiple data voltage jumps within one frame. Therefore, during testing, the existing pixel structure cannot be driven to display red, green, and blue electrical pure color images, resulting in some defective products entering subsequent processes, wasting materials and manpower. Summary of the invention

[0005] The purpose of the embodiments of the present application is to propose an electrical testing method and device for a liquid crystal display panel to solve the problem that the electrical testing fixture cannot display red, green, and blue electrical testing pure color images when driving pixels for testing, thereby avoiding the subsequent processes of the liquid crystal display panel NG product.

[0006] In a first aspect, a method for electrically testing a liquid crystal display panel comprises: Step 100, providing an array circuit, the array circuit comprising a plurality of groups of gate lines, a plurality of pixel units and a plurality of data lines, wherein different pixels of the plurality of pixel units are arranged longitudinally in sequence, and the same pixels of the plurality of pixel units are arranged transversely in sequence, each group of gate lines is electrically connected to the gates of triodes of the same type of pixels of the plurality of pixel units, each of the data lines is electrically connected to the drains of triodes of different types of pixels of the plurality of pixel units, and the sources of the triodes are electrically connected to the corresponding pixels; Step 200, drive one group of the multiple groups of gate lines and the corresponding data lines, write data for the same type of pixels in all rows connected to the group of gate lines, display the test screen, and set the remaining groups of gate lines to a low level, drive the remaining groups of gate lines and the corresponding data lines, until all types of electrical test screen tests are completed.

[0007] In conjunction with the electrical testing method for a liquid crystal display panel according to the first aspect of the present invention, in a first possible implementation manner, step 100 includes: Step 110, obtaining a first group of gate lines, and electrically connecting the first group of gate lines to the gates of the transistors of all rows of R pixels in the array circuit; Step 120, obtaining a second group of gate lines, and electrically connecting the second group of gate lines to the gates of the triodes of all rows of G pixels in the array circuit; Step 130 , obtaining a third group of gate lines, and electrically connecting the third group of gate lines to the gates of the transistors of the B pixels in all rows in the array circuit.

[0008] In combination with the first possible implementation of the first aspect of the present invention, in a second possible implementation, step 200 includes: Step 210, driving the first group of gate lines to write data into R pixels of all rows connected to the first group of gate lines to display a red test picture; Step 220: Set the second group of gate lines and the third group of gate lines to a low level.

[0009] In combination with the first possible implementation manner of the first aspect of the present invention, in a third possible implementation manner, step 200 includes: Step 230, driving the second group of gate lines to write data into G pixels of all rows connected to the second group of gate lines, and displaying a green test picture; Step 240: Set the first group of gate lines and the third group of gate lines to a low level.

[0010] In combination with the first possible implementation manner of the first aspect of the present invention, in a fourth possible implementation manner, step 200 includes: Step 250, driving the third group of gate lines to write data into B pixels of all rows connected to the third group of gate lines, and displaying a blue test picture; Step 260: Set the first group of gate lines and the second group of gate lines to a low level.

[0011] In a second aspect, an electrical measurement device for a liquid crystal display panel adopts the electrical measurement method described in the first aspect, comprising: A control module, a first driving module and a second driving module; The control module is electrically connected to the first driving module and the second driving module respectively; the first driving module is electrically connected to the plurality of gate lines respectively, and the second driving module is electrically connected to the plurality of data lines; The control module is used to control the first driving module: Drive one of the multiple groups of gate lines and the corresponding data lines, write data for the same type of pixels in all rows connected to the first group of gate lines, display a test screen, set the second group of gate lines and the third group of gate lines to a low level, drive the remaining groups of gate lines and the corresponding data lines, until all types of electrical test screen tests are completed.

[0012] In conjunction with the electrical measuring device for a liquid crystal display panel according to the second aspect of the present invention, in a first possible implementation manner, the first driving module includes: a first sub-drive unit; a second sub-drive unit; A third sub-drive unit; The first sub-driving unit is electrically connected to the GOA units of the R pixels of all rows of the first group of gate lines; The second sub-driving unit is electrically connected to the GOA units of the G pixels of all rows of the second group of gate lines; The third sub-driving unit is electrically connected to the GOA units of the B pixels of all rows of the third group of gate lines.

[0013] In combination with the first possible implementation manner of the second aspect of the present invention, in a second possible implementation manner, the control module is used to control the first sub-driving unit: The first group of gate lines is driven to write data into R pixels of all rows connected to the first group of gate lines, a red test picture is displayed, and the second group of gate lines and the third group of gate lines are set to a low level.

[0014] In combination with the first possible implementation manner of the second aspect of the present invention, in a third possible implementation manner, the control module is used to control the second sub-driving unit: The second group of gate lines is driven to write data into G pixels of all rows connected to the second group of gate lines, a green test screen is displayed, and the first group of gate lines and the third group of gate lines are set to a low level.

[0015] In combination with the first possible implementation manner of the second aspect of the present invention, in a third possible implementation manner, the control module is used to control the third sub-driving unit: The third group of gate lines is driven to write data into B pixels of all rows connected to the third group of gate lines, a blue test picture is displayed, and the first group of gate lines and the second group of gate lines are set to a low level.

[0016] The electrical testing method and device for the liquid crystal display panel described in the present invention are implemented by adjusting the driving timing of the electrical testing device, driving one group of multiple groups of gate lines and the corresponding data lines, writing data for the same type of pixels in all rows connected to the same group of gate lines, displaying a test picture, and setting the second group of gate lines and the third group of gate lines to a low level, thereby realizing electrical testing of three pure color pictures, avoiding the NG products of the liquid crystal display panel from entering the subsequent process, and solving the problem of being unable to display the red, green, and blue electrically tested pure color pictures. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the scheme in the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments of the present application. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 is a schematic diagram of the array circuit structure in this application; Figure 2 This application Figure 1 A schematic diagram of a cascade circuit structure corresponding to the array circuit; Figure 3 is a schematic diagram of the circuit connection structure between the second driving module and the data line in the present application; Figure 4 is a driving timing diagram corresponding to the first group of gate lines in this application; Figure 5 is a schematic diagram of the driving timing corresponding to the second group of gate lines in the present application; Figure 6 is a driving timing diagram corresponding to the third group of gate lines in this application; Figure 7 is a flow chart of a specific embodiment of the electrical testing method of the liquid crystal display panel in the present application; Figure 8 yes Figure 7 A flowchart of a specific embodiment of S100; Fig. 9 yes Figure 7 Flow chart of a first specific embodiment of S200; Fig.10 yes Figure 7 A second specific embodiment flow chart of S200 in FIG. Fig.11 yes Figure 7 Flow chart of a first specific embodiment of S200; Fig.12 It is a structural diagram of a specific embodiment of the electrical measuring device of the liquid crystal display panel in this application. DETAILED DESCRIPTION

[0019] The following will be combined with the accompanying drawings in the invention to clearly and completely describe the technical solutions in the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the present invention.

[0020] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0023] The purpose of the embodiments of the present application is to propose an electrical testing method and device for a liquid crystal display panel to solve the problem that the electrical testing fixture cannot display red, green, and blue electrical testing pure color images when driving pixels for testing, thereby avoiding the subsequent processes of the liquid crystal display panel NG product.

[0024] First, as Figure 7 , Figure 7 It is a flow chart of a specific embodiment of the electrical testing method of the liquid crystal display panel in the present application; an electrical testing method of the liquid crystal display panel comprises: S100. Provide an array circuit, the array circuit comprising a plurality of groups of gate lines, a plurality of pixel units and a plurality of data lines (S1, S2, ...), different pixels of the plurality of pixel units are arranged longitudinally in sequence, the same pixels of the plurality of pixel units are arranged transversely in sequence, each group of gate lines is electrically connected to the gates of transistors of the same type of pixels of the plurality of pixel units, each data line (S1, S2, ...) is electrically connected to the drains of transistors of different types of pixels of the plurality of pixel units, and the sources of the transistors are electrically connected to the respective corresponding pixels.

[0025] In this embodiment, if Figure 1 , Figure 1 Figure 1 is a schematic diagram of the array circuit structure in this application; pixels of the same type in the array circuit are arranged horizontally, such as Figure 1 As shown, it includes multiple rows of R pixels, multiple rows of G pixels, and multiple rows of B pixels.

[0026] In a preferred embodiment, Figure 8 , Figure 8 yes Figure 7 A flow chart of a specific embodiment of S100 in the embodiment; S100 includes: S110, obtaining a first group of gate lines (G1, G4, ...), and electrically connecting the first group of gate lines (G1, G4, ...) to the gates of the triodes of all rows of R pixels in the array circuit; S120, obtaining a second group of gate lines (G2, G5, ...), and electrically connecting the second group of gate lines (G2, G5, ...) to the gates of the triodes of all rows of G pixels in the array circuit; S130, obtaining a third group of gate lines (G3, G6, ...), and electrically connecting the third group of gate lines (G3, G6, ...) to the gates of the triodes of all rows of B pixels in the array circuit.

[0027] In this embodiment, if Figure 2 , Figure 2 This application Figure 1 A schematic diagram of a cascade circuit structure corresponding to an array circuit; the gate lines are divided into three groups of gate lines according to the different pixels they are connected to drive, the first group of gate lines (G1, G4, ...) are electrically connected to the gates of the triodes of multiple rows of R pixels, the second group of gate lines (G2, G5, ...) are electrically connected to the gates of the triodes of multiple rows of G pixels, the third group of gate lines (G3, G6, ...) are electrically connected to the gates of the triodes of multiple rows of B pixels, and also include multiple data lines (S1, S2, ...), which are respectively electrically connected to the drains of the triodes of each row of pixels.

[0028] S200, drive one group of multiple groups of gate lines and the corresponding data lines (S1, S2, ...), write data for the same type of pixels in all rows connected to the group of gate lines, display the test screen, and set the remaining groups of gate lines to a low level, drive the remaining groups of gate lines and the corresponding data lines (S1, S2, ...), until all types of electrical test screen tests are completed.

[0029] In a preferred embodiment, Fig. 9 , Fig. 9 yes Figure 7 The first specific embodiment flow chart of S200 in the embodiment; S200 includes: S210, driving the first group of gate lines (G1, G4, ...), writing data for the R pixels of all rows connected to the first group of gate lines (G1, G4, ...), and displaying a red test screen; S220, setting the second group of gate lines (G2, G5, ...) and the third group of gate lines (G3, G6, ...) to a low level, such as Figure 4 , Figure 4 It is a driving timing diagram corresponding to the first group of gate lines (G1, G4, ...) in this application.

[0030] In a preferred embodiment, Fig.10 , Fig.10 yes Figure 7 The second specific embodiment flow chart of S200 in the embodiment; S200 includes: S230, driving the second group of gate lines (G2, G5, ...), writing data for the G pixels of all rows connected to the second group of gate lines (G2, G5, ...), and displaying a green test screen; S240, setting the first group of gate lines (G1, G4, ...) and the third group of gate lines (G3, G6, ...) to a low level, such as Figure 5 , Figure 5 It is a schematic diagram of the driving timing corresponding to the second group of gate lines (G2, G5, ...) in this application.

[0031] In a preferred embodiment, Fig.11 , Fig.11 yes Figure 7 The first specific embodiment flow chart of S200 in the embodiment; S200 includes: S250, driving the third group of gate lines (G3, G6, ...), writing data for the B pixels of all rows connected to the third group of gate lines (G3, G6, ...), and displaying a blue test screen; S260, setting the first group of gate lines (G1, G4, ...) and the second group of gate lines (G2, G5, ...) to a low level, such as Figure 6 , Figure 6It is a driving timing diagram corresponding to the third group of gate lines (G3, G6, ...) in this application.

[0032] In a second aspect, an electrical measuring device for a liquid crystal display panel, such as Fig.12 , Fig.12 1 is a structural diagram of a specific embodiment of the electrical measurement device of the liquid crystal display panel in the present application. The electrical measurement method of the first aspect includes a control module 300, a first driving module and a second driving module 500 (VGG); the control module 300 is electrically connected to the first driving module and the second driving module 500 (VGG) respectively; the first driving module is electrically connected to multiple groups of gate lines respectively, such as Figure 3 , Figure 3 It is a schematic diagram of the circuit connection structure of the second driving module 500 (VGG) and the data lines (S1, S2, ...) in the present application; the second driving module 500 (VGG) is electrically connected to multiple data lines (S1, S2, ...); the control module 300 is used to control the first driving module: drive one of the multiple groups of gate lines and the corresponding data lines (S1, S2, ...), write data for the same type of pixels in all rows connected to the first group of gate lines (G1, G4, ...), display the test screen, and set the second group of gate lines (G2, G5, ...) and the third group of gate lines (G3, G6, ...) to a low level, drive the remaining groups of gate lines and the corresponding data lines (S1, S2, ...), until all types of electrical test screen tests are completed.

[0033] Further, the first driving module includes a first sub-driving unit 410 (CK1), a second sub-driving unit 420 (CK2), and a third sub-driving unit 430 (CK2); the first sub-driving unit 410 (CK1) is electrically connected to the GOA units of the R pixels of all rows of the first group of gate lines (G1, G4, ...); the second sub-driving unit 420 (CK2) is electrically connected to the GOA units of the G pixels of all rows of the second group of gate lines (G2, G5, ...); the third sub-driving unit 430 (CK2) is electrically connected to the GOA units of the B pixels of all rows of the third group of gate lines (G3, G6, ...).

[0034] Furthermore, the control module 300 is used to control the first sub-driving unit 410 (CK1): drive the first group of gate lines (G1, G4, ...), write data for the R pixels of all rows connected to the first group of gate lines (G1, G4, ...), display a red test screen, and set the second group of gate lines (G2, G5, ...) and the third group of gate lines (G3, G6, ...) to a low level.

[0035] Furthermore, the control module 300 is used to control the second sub-driving unit 420 (CK2): Drive the second group of gate lines (G2, G5, ...), write data for the G pixels of all rows connected to the second group of gate lines (G2, G5, ...), display a green test screen, and set the first group of gate lines (G1, G4, ...) and the third group of gate lines (G3, G6, ...) to a low level.

[0036] Furthermore, the control module 300 is used to control the third sub-driving unit 430 (CK2) to drive the third group of gate lines (G3, G6, ...), write data for the B pixels of all rows connected to the third group of gate lines (G3, G6, ...), display a blue test screen, and set the first group of gate lines (G1, G4, ...) and the second group of gate lines (G2, G5, ...) to a low level.

[0037] The electrical testing method and device for implementing the liquid crystal display panel of the present invention adjusts the driving timing of the electrical testing device to drive one group of multiple groups of gate lines and the corresponding data lines (S1, S2, ...), writes data to the same type of pixels in all rows connected to the same group of gate lines, displays a test picture, and sets the second group of gate lines (G2, G5, ...) and the third group of gate lines (G3, G6, ...) to a low level, thereby realizing electrical testing of three pure color pictures, avoiding the NG products of liquid crystal display panels from entering subsequent processes, and solving the problem of being unable to display red, green, and blue pure color pictures that can be tested electrically.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for electrical testing of a liquid crystal display panel, comprising: Provided is an array circuit, the array circuit comprising a plurality of groups of gate lines, a plurality of pixel units and a plurality of data lines, wherein different pixels of the plurality of pixel units are arranged longitudinally in sequence, and the same pixels of the plurality of pixel units are arranged transversely in sequence, each group of gate lines is electrically connected to the gates of triodes of the same type of pixels of the plurality of pixel units, each of the data lines is electrically connected to the drains of triodes of different types of pixels of the plurality of pixel units, and the sources of the triodes are electrically connected to the corresponding pixels; Drive one of the plurality of gate lines and the corresponding data lines, write data for the same type of pixels in all rows connected to the gate line group, display the test screen, set the remaining gate lines to a low level, drive the remaining gate lines and the corresponding data lines, until all types of electrical test screen tests are completed.

2. The electrical testing method of a liquid crystal display panel according to claim 1, characterized in that: Provided is an array circuit, the array circuit comprising a plurality of groups of gate lines, a plurality of pixel units and a plurality of data lines, wherein different pixels of the plurality of pixel units are arranged longitudinally in sequence, and the same pixels of the plurality of pixel units are arranged transversely in sequence, each group of gate lines is electrically connected to the gates of triodes of the same type of pixels of the plurality of pixel units, each of the data lines is electrically connected to the drains of triodes of different types of pixels of the plurality of pixel units, and the sources of the triodes are electrically connected to the corresponding pixels, including: Obtaining a first group of gate lines, and electrically connecting the first group of gate lines to the gates of the triodes of all rows of R pixels in the array circuit; Obtaining a second group of gate lines, and electrically connecting the second group of gate lines to the gates of the triodes of all rows of G pixels in the array circuit; A third group of gate lines is obtained, and the third group of gate lines is electrically connected to the gates of the transistors of the B pixels in all rows in the array circuit.

3. The electrical testing method of a liquid crystal display panel according to claim 2, characterized in that: The step of driving one of the plurality of gate lines and the corresponding data lines, writing data to the pixels of the same type in all rows connected to the gate line group, displaying a test screen, and setting the gate lines of the remaining groups to a low level, driving the remaining gate lines and the corresponding data lines, until all types of electrical test screen tests are completed, includes: driving the first group of gate lines to write data into R pixels of all rows connected to the first group of gate lines, and displaying a red test picture; The second group of gate lines and the third group of gate lines are set to a low level.

4. The electrical testing method of a liquid crystal display panel according to claim 2, characterized in that: The step of driving one of the plurality of gate lines and the corresponding data lines, writing data to the pixels of the same type in all rows connected to the gate line group, displaying a test screen, and setting the gate lines of the remaining groups to a low level, driving the remaining gate lines and the corresponding data lines, until all types of electrical test screen tests are completed, includes: driving the second group of gate lines to write data into G pixels of all rows connected to the second group of gate lines, and displaying a green test picture; The first group of gate lines and the third group of gate lines are set to a low level.

5. The electrical testing method of a liquid crystal display panel according to claim 2, characterized in that: The step of driving one of the plurality of gate lines and the corresponding data lines, writing data to the pixels of the same type in all rows connected to the gate line group, displaying a test screen, and setting the gate lines of the remaining groups to a low level, driving the remaining gate lines and the corresponding data lines, until all types of electrical test screen tests are completed, includes: driving the third group of gate lines to write data into B pixels of all rows connected to the third group of gate lines, and displaying a blue test picture; The first group of gate lines and the second group of gate lines are set to a low level.

6. An electrical measurement device for a liquid crystal display panel, using the electrical measurement method according to any one of claims 1 to 5, characterized in that: include: A control module, a first driving module and a second driving module; The control module is electrically connected to the first driving module and the second driving module respectively; the first driving module is electrically connected to the plurality of gate lines respectively, and the second driving module is electrically connected to the plurality of data lines; The control module is used to control the first driving module: Drive one of the multiple groups of gate lines and the corresponding data lines, write data for the same type of pixels in all rows connected to the first group of gate lines, display a test screen, set the second group of gate lines and the third group of gate lines to a low level, drive the remaining groups of gate lines and the corresponding data lines, until all types of electrical test screen tests are completed.

7. The electrical measuring device for a liquid crystal display panel according to claim 6, characterized in that: The first driving module comprises: a first sub-drive unit; a second sub-drive unit; A third sub-drive unit; The first sub-driving unit is electrically connected to the GOA units of the R pixels of all rows of the first group of gate lines; The second sub-driving unit is electrically connected to the GOA units of the G pixels of all rows of the second group of gate lines; The third sub-driving unit is electrically connected to the GOA units of the B pixels of all rows of the third group of gate lines.

8. The electrical measuring device for a liquid crystal display panel according to claim 7, characterized in that: The control module is used to control the first sub-driving unit: The first group of gate lines is driven to write data into R pixels of all rows connected to the first group of gate lines, a red test picture is displayed, and the second group of gate lines and the third group of gate lines are set to a low level.

9. The electrical measuring device for a liquid crystal display panel according to claim 7, characterized in that: The control module is used to control the second sub-driving unit: The second group of gate lines is driven to write data into G pixels of all rows connected to the second group of gate lines, a green test screen is displayed, and the first group of gate lines and the third group of gate lines are set to a low level.

10. The electrical measuring device for a liquid crystal display panel according to claim 7, characterized in that: The control module is used to control the third sub-driving unit: The third group of gate lines is driven to write data into B pixels of all rows connected to the third group of gate lines, a blue test picture is displayed, and the first group of gate lines and the second group of gate lines are set to a low level.

Images