Display panel and display device

Abstract

The utility model discloses a display panel and a display device, and relates to the technical field of display. The display panel comprises a plurality of first data signal test pads and a plurality of second data signal test pads, and one first data signal test pad is arranged between every two adjacent first binding areas. A second data signal test pad is arranged on the side, away from the adjacent first binding area, of the first first binding area arranged in the first direction, and a second data signal test pad is arranged on the side, away from the adjacent first binding area, of the last first binding area arranged in the first direction. One first data signal test pad provides signals of M / 2 data lines for two adjacent first binding areas, and one second data signal test pad provides signals of M / 2 data lines for the adjacent first binding areas; according to the display panel, the first data signal test pad and the second data signal test pad are arranged, so that the screen splitting phenomenon of the display panel is improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] At present, before a display panel leaves the factory, it is usually necessary to perform a Cell test (screen test, or dot screen test). During the screen test stage, since the display panel has not yet been attached with a polarizer, and the IC (Interated Circuit) and FPC (Flexible Printed Circuit) have not been welded, the display panel cannot be directly lit up. Therefore, in order to light up the display panel, it is necessary to design a detection circuit for Cell test. The existing practice is usually to connect all signal lines in groups in the binding area of ​​the display panel, and lead out the grouped traces to the Celltest pad (screen test pad) at both ends of the binding area. When performing a Cell test, the Cell test pad is loaded with a suitable electrical signal through an external probe, and in conjunction with an external polarizer, the display screen can be lit up, thereby detecting defects in the display screen.

[0003] In actual testing of existing display panels, when the screen is lit up to display a grayscale image through Cell test, the number of data lines connected to the test pads corresponding to the two outermost binding areas is greater than the number of data lines connected to the test pads corresponding to the middle binding area, that is, the load of the test pads corresponding to the two outermost binding areas is greater than the load of the test pads corresponding to the middle binding area, resulting in an obvious split screen phenomenon between the area of ​​the display panel corresponding to the two outermost binding areas and the area of ​​the display panel corresponding to the middle binding area, affecting the product testing results. Therefore, a display panel that can solve the split screen phenomenon during Cell test is urgently needed. Utility Model Content

[0004] The purpose of the present application is to provide a display panel and a display device, which improve the split-screen phenomenon of the display panel by setting a first data signal test pad and a second data signal test pad.

[0005] The present application discloses a display panel, comprising a display area and a non-display area arranged around the display area, wherein N*M data lines are arranged on the display area, and N first binding areas arranged along a first direction are arranged on the non-display area, and one first binding area is connected to the M data lines to provide signals of the M data lines. The display panel also comprises a first data signal test pad and a second data signal test pad, wherein a plurality of the first data signal test pads are provided, and one first data signal test pad is provided between two adjacent first binding areas, and a first first binding area arranged along the first direction is provided with a second data signal test pad on a side away from the adjacent first binding area, and a last first binding area arranged along the first direction is also provided with a second data signal test pad on a side away from the adjacent first binding area, and a plurality of the first data signal test pads and two second data signal test pads are arranged in series; wherein the first direction is perpendicular to the extending direction of the data lines, and one first data signal test pad provides signals of M / 2 data lines to two adjacent first binding areas respectively, and one second data signal test pad provides signals of M / 2 data lines to the adjacent first binding area.

[0006] Optionally, the first data signal test pad includes a first red data signal test pad, a first green data signal test pad and a first blue data signal test pad, the second data signal test pad includes a second red data signal test pad, a second green data signal test pad and a second blue data signal test pad, the data line includes a red data line, a green data line and a blue data line, and the display panel also includes a shorting bar, all of the red data lines are connected in series with the first red data signal test pad and the second red data signal test pad through the shorting bar, all of the green data lines are connected in series with the first green data signal test pad and the second green data signal test pad through the shorting bar, and all of the blue data lines are connected in series with the first blue data signal test pad and the second blue data signal test pad through the shorting bar.

[0007] Optionally, the voltage signal of the second data signal test pad is equal to the voltage signal of the first data signal test pad.

[0008] Optionally, the voltage signal of the second data signal test pad is X, and the voltage signal of the first data signal test pad is 2*X.

[0009] Optionally, a common signal test pad is further provided between two adjacent first binding areas.

[0010] The present application also discloses a display panel, comprising a display area and a non-display area arranged around the display area, the display area being provided with N*M data lines, the non-display area being provided with N first binding areas arranged along a first direction, one of the first binding areas being connected to the M data lines to provide signals of the M data lines, and characterized in that it also comprises a third data signal test pad, the first binding areas being grouped into two, two of the third data signal test pads being provided in the middle of a group of the first binding areas, and the two third data signal test pads being connected to adjacent first binding areas in sequence; wherein one of the third data signal test pads provides signals of the M data lines to one of the first binding areas.

[0011] Optionally, a plurality of the third data signal test pads are arranged in series.

[0012] Optionally, the third data signal test pad includes a third red data signal test pad, a third blue data signal test pad and a third green data signal test pad, the data line includes a red data line, a green data line and a blue data line, the display panel also includes a shorting bar, all the red data lines are connected in series with the third red data signal test pad through the shorting bar, all the green data lines are connected in series with the third green data signal test pad through the shorting bar, and all the blue data lines are connected in series with the third blue data signal test pad through the shorting bar.

[0013] Optionally, the two outermost first binding regions are further provided with control signal test pads at positions away from adjacent first binding regions.

[0014] The present application also discloses a display device, comprising a power driving circuit and the display panel as described above, wherein the power driving circuit drives the display panel.

[0015] Compared with the original display panel's solution in which the number of data lines connected to the test pads corresponding to the two outermost binding areas is greater than the number of data lines connected to the test pads corresponding to the middle binding area, the display panel of the present application reduces the number of data lines required to provide data signals for the first data signal test pads corresponding to the two outermost binding areas by correspondingly setting second data signal test pads on the two outermost binding areas on the left and right sides of the display panel, so that the size of the data signal provided by the first data signal test pads corresponding to the two outermost binding areas of the display panel is the same as the size of the data signal provided by the first data signal test pads corresponding to the binding area in the middle of the display panel. The display panel will not have the brightness of the two side areas lower than the brightness of the middle area, thereby improving the split-screen phenomenon of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0017] Figure 1 is a structural schematic diagram of a display panel according to the first embodiment of the present application;

[0018] Figure 2 is a structural schematic diagram of a display panel according to a second embodiment of the present application;

[0019] Figure 3 is another structural schematic diagram of a display panel according to the second embodiment of the present application;

[0020] Figure 4 is a schematic diagram of a connection structure of a shorting bar in a display panel according to a second embodiment of the present application;

[0021] Figure 5 It is a structural schematic diagram of a display device of the third embodiment of the present application.

[0022] Among them, 100, display panel; 200, display area; 300, non-display area; 310, short-circuit bar; 320, common signal test pad; 330, control signal test pad; 400, first binding area; 500, first data signal test pad; 510, first red data signal test pad; 520, first green data signal test pad; 530, first blue data signal test pad; 600, second data signal test pad; 610, second red data signal test pad; 620, second green data signal test pad; 630, second blue data signal test pad; 700, third data signal test pad; 710, third red data signal test pad; 720, third green data signal test pad; 730, third blue data signal test pad; 800, power drive circuit; 900, display device. DETAILED DESCRIPTION

[0023] It should be understood that the terms used herein, the specific structures and functional details disclosed are only for describing specific embodiments and are representative, but the present application can be implemented in many alternative forms and should not be construed as being limited to only the embodiments described herein.

[0024] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, unless otherwise specified, features defined as "first" and "second" may explicitly or implicitly include one or more of the features; "plurality" means two or more. The term "including" and any variation thereof means non-exclusive inclusion, and one or more other features, integers, steps, operations, units, components and / or combinations thereof may exist or be added.

[0025] In addition, terms indicating orientation or positional relationships, such as “center,” “lateral,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inside,” and “outside,” are described based on the orientation or relative positional relationships shown in the accompanying drawings and are merely simplified descriptions for the convenience of describing the present application. They do not indicate that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limitations on the present application.

[0026] In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internally connected between two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] The present application is described in detail below with reference to the accompanying drawings and optional embodiments. It should be noted that, under the premise of no conflict, the embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0028] like Figure 1As shown, as a first embodiment of the present application, a display panel 100 is disclosed, wherein the display panel 100 includes a display area 200 and a non-display area 300 arranged around the display area 200, wherein the display area 200 is provided with N*M data lines, and the non-display area 300 is provided with N first binding areas 400 arranged along a first direction, wherein one first binding area 400 is connected to the M data lines to provide signals of the M data lines, and the display panel 100 further includes a first data signal test pad 500 and a second data signal test pad 600, wherein a plurality of first data signal test pads 500 are provided, wherein one first data signal test pad 500 is provided between two adjacent first binding areas 400, and wherein the first data signal test pad 500 is provided along the first direction. The first first binding area 400 arranged in the first direction is provided with a second data signal test pad 600 on a side away from the adjacent first binding area 400, and the last first binding area 400 arranged along the first direction is also provided with a second data signal test pad 600 on a side away from the adjacent first binding area 400. A plurality of first data signal test pads 500 and two second data signal test pads 600 are arranged in series, and the first direction is perpendicular to the extension direction of the data line. One first data signal test pad 500 provides signals of M / 2 data lines to two adjacent first binding areas 400 respectively, and one second data signal test pad 600 provides signals of M / 2 data lines to the adjacent first binding area 400.

[0029] The display panel 100 of this embodiment, when performing a Cell test (screen test, or point screen test), loads data signals to the first data signal test pad 500 and the second data signal test pad 600 by needle piercing, and a needle is required between each two first binding areas 400 to provide a Data signal, that is, the Data signal is provided to the data line in the display area 200 through the first data signal test pad 500 and the second data signal test pad 600, and a first data signal test pad 500 is arranged between the two first binding areas 400, and one of the first data signal test pads 500 provides data signals of M / 2 data lines to the two adjacent first binding areas 400, that is, one of the first data signal test pads 500 provides data signals for M data lines, and the first and last first binding areas 400 arranged in the first direction are provided with a second data signal test pad 600 on the side away from the adjacent first binding area 400, so that one second data signal test pad 600 provides the corresponding The adjacent first binding area 400 provides data signals for M / 2 data lines, so that the number of data lines required for the first data signal test pad 500 to provide data signals is slightly greater than the number of data lines required for the second data signal test pad 600 to provide data signals; and, a plurality of the first data signal test pads 500 and two of the second data signal test pads 600 are arranged in series, the data signal obtained by the second data signal test pad 600 is the same as the data signal obtained by the first data signal test pad 500, and the data signal obtained by the second data signal test pad 600 is more than enough to drive the M / 2 data lines, so that the brightness of the area of ​​the display panel 100 corresponding to the second data signal test pad 600 will not be less than the brightness of the area of ​​the display panel 100 corresponding to the first data signal test pad 500, that is, the brightness of the two side areas of the display panel 100 will not be less than the brightness of the middle area, so that the display panel 100 will not have an obvious split screen phenomenon;

[0030] In general, compared with the original display panel 100 in which the number of data lines connected to the test pads corresponding to the two outermost binding areas is greater than the number of data lines connected to the test pads corresponding to the middle binding area, the display panel 100 of the present application reduces the number of data lines required to provide data signals for the first data signal test pads 500 corresponding to the two outermost binding areas by correspondingly setting second data signal test pads 600 on the two outermost binding areas on the left and right sides of the display panel 100, so that the size of the data signal provided by the first data signal test pads 500 corresponding to the two outermost binding areas of the display panel 100 is the same as the size of the data signal provided by the first data signal test pads 500 corresponding to the binding area in the middle of the display panel 100, and the brightness of the two side areas of the display panel 100 will not be lower than the brightness of the middle area, thereby improving the split-screen phenomenon of the display panel 100.

[0031] Furthermore, in order to make the display of the display panel 100 more perfect, the data signal obtained by the second data signal test pad 600 is X, and the data signal obtained by the first data signal test pad 500 is 2*X. The voltage signal of the second data signal test pad 600 is adjusted according to the difference in the number of data lines connected to the first data signal test pad 500, so that the data signals required to be provided to each data line by the first data signal test pad 500 and the second data signal test pad 600 are the same, so that the data signals and voltage signals obtained by the data lines in each area of ​​the display panel 100 are the same, the brightness of the display panel 100 tends to be consistent, and the split screen phenomenon of the display panel 100 is greatly improved; and the number of data line loads (data loading) that the first data signal test pad 500 and the second data signal test pad 600 need to bear is the same, so there will be no display difference caused by insufficient power supply between areas of the display panel 100 due to the difference in load (data loading), thereby improving the split screen phenomenon and ensuring the accuracy of the display panel 100 during the Cell test (screen detection, or point screen detection).

[0032] Specifically, the first data signal test pad 500 includes a first red data signal test pad 510, a first green data signal test pad 520 and a first blue data signal test pad 530, the second data signal test pad 600 includes a second red data signal test pad 610, a second green data signal test pad 620 and a second blue data signal test pad 630, the data line includes a red data line, a green data line and a blue data line, the display panel 100 also includes a shorting bar, and all the red data lines are connected to the first red data signal test pad 510 and the second red data signal test pad 530 through the shorting bar. The first data signal test pad 500 and the second data signal test pad 600 in the display panel 100 are connected in series, and the loads (data signal) corresponding to the first data signal test pad 500 and the second data signal test pad 600 in the display panel 100 are balanced. loading); and, a common signal test pad 320 is provided between two adjacent first binding areas 400 to provide a common voltage signal for the common line of the display panel 100, so as to facilitate Cell test (screen detection, or point screen detection), and the two outermost first binding areas 400 are further provided with a control signal test pad 330 at a position away from the adjacent first binding areas 400, and the control signal is a GDL (GateDriver less, less gate driver technology) control signal, which provides the display panel 100 with a GDL control signal for Cell test (screen detection, or point screen detection).

[0033] like Figure 2 As shown, as the second embodiment of the present application, different from the first embodiment of the present application, a display panel 100 is disclosed, the display panel 100 includes a display area 200 and a non-display area 300 arranged around the display area 200, the display area 200 is provided with N*M data lines, the non-display area 300 is provided with N first binding areas 400 arranged along a first direction, one first binding area 400 is connected to the M data lines to provide signals of the M data lines, the display panel 100 also includes a third data signal test pad 700, the first binding areas 400 are grouped in two, two third data signal test pads 700 are provided in the middle of a group of the first binding areas 400, the two third data signal test pads 700 are sequentially connected to the adjacent first binding areas 400, wherein one third data signal test pad 700 provides signals of the M data lines for one first binding area 400;

[0034] In this embodiment, two third data signal test pads 700 are provided in the middle of a group of the first binding areas 400, and one of the third data signal test pads 700 provides data signals for the M data lines of the first binding area 400 on one side, and the other third data signal test pad 700 provides data signals for the M data lines of the first binding area 400 on the other side, so that the number of data lines required to provide data signals for each of the third data signal test pads 700 is the same, that is, the data signal and voltage required to be provided by each of the third data signal test pads 700 are the same, and the load (data loading) of the data line required to be borne by each of the third data signal test pads 700 is also the same, and there will be no display difference caused by insufficient power supply between areas of the display panel 100 due to the difference in load (data loading), thereby improving the split screen phenomenon of the display panel 100 and ensuring the accuracy of the display panel 100 during Cell test (screen detection, or point screen detection);

[0035] Moreover, compared with the display panel 100 of the first embodiment, the display panel 100 of the present embodiment is more suitable for use in a small-sized display panel 100. Since the display panel 100 of the first embodiment needs to add a second data signal test pad 600 on the outermost side of the non-display area 300 of the display panel 100, in a large-sized display panel 100, there may be space in the non-display area 300 for additionally setting the second data signal test pad 600, thereby avoiding increasing the non-display area 300 of the display panel 100 during use. The display panel 100 of the present embodiment does not need to additionally set the second data signal test pad 600 on the outermost side of the non-display area 300, and the area of ​​the non-display area 300 of the display panel 100 will not be increased. At the same time, since two third data signal test pads 700 are provided in the middle of a group of the first binding areas 400, the number of needles for needle puncture can be greatly reduced during needle puncture, and only one needle is required in the middle of a group of the first binding areas 400 for needle puncture to perform Cell puncture. test (screen detection, or point screen detection), so as to improve the test efficiency when performing Cell test (screen detection, or point screen detection); of course, designers can choose the design according to the actual situation, which will not be elaborated here.

[0036] In this embodiment, if Figure 3 and Figure 4As shown, the plurality of third data signal test pads 700 may be arranged in series. Specifically, the third data signal test pad 700 includes a third red data signal test pad 710, a third blue data signal test pad and a third green data signal test pad 720. The data lines include a red data line, a green data line and a blue data line. The display panel 100 further includes a shorting bar 310. All the red data lines are connected in series with the third red data signal test pad 710 via the shorting bar 310. All the green data lines are connected in series with the third green data signal test pad 720 via the shorting bar 310. All the blue data lines are connected in series with the third blue data signal test pad 730 via the shorting bar 310, so as to balance the loads (data signal) corresponding to the plurality of third data signal test pads 700 in the display panel 100. loading), thereby avoiding the situation where the loads of multiple third data signal test pads 700 are different due to process or other problems that occur when installing or assembling the display panel 100, thereby improving the accuracy of the test; and, a common signal test pad 320 is further provided between two adjacent third data signal test pads 700 to provide a common voltage signal for the common line of the display panel 100, thereby facilitating Cell test (screen detection, or point screen detection), and the two outermost first binding areas 400 are further provided with a control signal test pad 330 at a position away from the adjacent first binding areas 400, and the control signal is a GDL (Gate Driver less) control signal, which provides the display panel 100 with a GDL control signal for Cell test (screen detection, or point screen detection).

[0037] like Figure 5As shown, as the third embodiment of the present application, a display device 900 is disclosed, the display device 900 includes a power driving circuit 800 and a display panel 100 as described in the above embodiment, and the power driving circuit 800 drives the display panel 100. In the display device of this embodiment, two third data signal test pads are provided in the middle of a group of the first binding areas, and one third data signal test pad provides data signals for M data lines of the first binding area on one side, and the other third data signal test pad provides data signals for M data lines of the first binding area on the other side, so that the number of data lines required to provide data signals for each third data signal test pad is the same, that is, the data signal and voltage required to be provided by each third data signal test pad are the same, and the data line load (data loading-ing) required to be borne by each third data signal test pad is also the same, and there will be no display difference caused by insufficient power supply between areas of the display panel due to the difference in load (data loading), thereby improving the split screen phenomenon of the display panel and ensuring the accuracy of the display panel during Cell test (screen detection, or point screen detection).

[0038] The technical solution of the present application can be widely used in various display panels, such as TN (Twisted Nematic) display panel, IPS (In-Plane Switching) display panel, VA (Vertical Alignment) display panel, MVA (Multi-Domain Vertical Alignment) display panel, and of course, other types of display panels, such as OLED (Organic Light-Emitting Diode) display panel, can all be applicable to the above solution.

[0039] It should be noted that the inventive concept of the present application can form a large number of embodiments, but the length of the application document is limited and it is impossible to list them one by one. Therefore, under the premise of no conflict, the embodiments or technical features described above can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effects will be enhanced.

[0040] The above content is a further detailed description of the present application in combination with specific optional implementation methods, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, which should be deemed to fall within the scope of protection of the present application.

Claims

1. A display panel, comprising a display area and a non-display area surrounding the display area, wherein the display area is provided with N*M data lines, the non-display area is provided with N first binding areas arranged along a first direction, one of the first binding areas is connected to the M data lines to provide signals of the M data lines, characterized in that: It also includes a first data signal test pad and a second data signal test pad, wherein a plurality of the first data signal test pads are provided, one of the first data signal test pads is provided between two adjacent first binding areas, a second data signal test pad is provided on a side of the first first binding area arranged along the first direction away from the adjacent first binding area, and a second data signal test pad is also provided on a side of the last first binding area arranged along the first direction away from the adjacent first binding area, and the plurality of the first data signal test pads and the two second data signal test pads are arranged in series; The first direction is perpendicular to the extension direction of the data line, one of the first data signal test pads provides signals of M / 2 data lines to two adjacent first binding areas respectively, and one of the second data signal test pads provides signals of M / 2 data lines to the adjacent first binding areas.

2. The display panel according to claim 1, characterized in that: The first data signal test pad includes a first red data signal test pad, a first green data signal test pad and a first blue data signal test pad, the second data signal test pad includes a second red data signal test pad, a second green data signal test pad and a second blue data signal test pad, the data line includes a red data line, a green data line and a blue data line, the display panel also includes a shorting bar, all the red data lines are connected in series with the first red data signal test pad and the second red data signal test pad through the shorting bar, all the green data lines are connected in series with the first green data signal test pad and the second green data signal test pad through the shorting bar, and all the blue data lines are connected in series with the first blue data signal test pad and the second blue data signal test pad through the shorting bar.

3. The display panel according to claim 1, characterized in that: The voltage signal of the second data signal test pad is equal to the voltage signal of the first data signal test pad.

4. The display panel according to claim 1, characterized in that: The voltage signal of the second data signal test pad is X, and the voltage signal of the first data signal test pad is 2*X.

5. The display panel according to claim 1, characterized in that: A common signal test pad is also provided between two adjacent first binding areas.

6. A display panel, comprising a display area and a non-display area surrounding the display area, wherein the display area is provided with N*M data lines, the non-display area is provided with N first binding areas arranged along a first direction, one of the first binding areas is connected to the M data lines to provide signals of the M data lines, characterized in that: It also includes a third data signal test pad, the first binding areas are grouped into two, two third data signal test pads are arranged in the middle of a group of the first binding areas, and the two third data signal test pads are sequentially connected to adjacent first binding areas; Wherein, one of the third data signal test pads provides signals of M data lines to one of the first binding regions.

7. The display panel according to claim 6, characterized in that: A plurality of the third data signal test pads are arranged in series.

8. The display panel according to claim 7, characterized in that: The third data signal test pad includes a third red data signal test pad, a third blue data signal test pad and a third green data signal test pad, the data lines include a red data line, a green data line and a blue data line, the display panel also includes a shorting bar, all the red data lines are connected in series with the third red data signal test pad via the shorting bar, all the green data lines are connected in series with the third green data signal test pad via the shorting bar, and all the blue data lines are connected in series with the third blue data signal test pad via the shorting bar.

9. The display panel according to claim 6, characterized in that: The two outermost first binding areas are further provided with control signal test pads at positions away from the adjacent first binding areas.

10. A display device, characterized in that: The invention comprises a power driving circuit and a display panel as claimed in any one of claims 6 to 9, wherein the power driving circuit drives the display panel.

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