Pixel structure and terminal device

Abstract

The embodiment of the utility model discloses a pixel structure and terminal equipment, the pixel structure comprises a pixel electrode, an extension electrode, a first connecting part and a second connecting part, the extension electrode and the pixel electrode are arranged on the same layer, and the pixel electrode comprises at least two branch electrodes which are connected in parallel through the second connecting part. The two ends of the at least two extension electrodes are connected with the first connecting part and the second connecting part respectively to achieve communication, and signal transmission between the pixel electrode and the thin film transistor cannot be affected when any extension electrode is broken or short-circuited.

Description

Technical Field

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

[0002] The existing liquid crystal pixel structure includes multiple pixel structures. In the pixel structure, since the pixel electrode and the thin film transistor need to be electrically connected, the electrical connection is achieved by setting a single wiring between the pixel electrode and the thin film transistor. The metal under the wiring is prone to electrostatic breakdown or abnormalities during film formation, resulting in weak connection or breakage of the wiring. Weak connection forms a bright spot defect, and breakage forms a dark spot defect.

[0003] Therefore, the existing pixel structure has a technical problem of poor light and dark spots due to weak connection or breakage of the wiring. Utility Model Content

[0004] The embodiments of the present application provide a pixel structure and a terminal device, which can alleviate the technical problem of poor bright and dark spots caused by weak connection or breakage of wiring in the existing pixel structure.

[0005] An embodiment of the present application provides a pixel structure, comprising a plurality of scan lines, a plurality of data lines, and a plurality of pixel units arranged in a matrix form, wherein the pixel unit comprises a pixel electrode and a thin film transistor connected to the pixel electrode, wherein the pixel electrode comprises a trunk electrode, a plurality of branch electrodes connected to the trunk electrode, and a first connection portion electrically connected to at least two of the branch electrodes; the thin film transistor comprises a gate electrode, a source electrode, and a drain electrode, wherein the drain electrode is connected to the first connection portion;

[0006] The pixel electrode further includes a second connecting portion and at least two extending electrodes, the second connecting portion connects the at least two branch electrodes, one end of at least two extending electrodes are electrically connected to the second connecting portion, and the other end of at least two extending electrodes are electrically connected to the first connecting portion.

[0007] Optionally, in some embodiments of the present application, the extended electrode and the pixel electrode are arranged in the same layer, and the two extended electrodes are electrically connected to the drain electrode respectively.

[0008] Optionally, in some embodiments of the present application, the extended electrode includes a first extension portion and a second extension portion connected to the first extension portion, the extension direction of the first extension portion is the same as the extension direction of the branch electrode, the second extension portion is connected to the first connecting portion, and the second extension portion and the second connecting portion are parallel to the scanning line.

[0009] Optionally, in some embodiments of the present application, the pixel unit includes a main pixel area, a sub-pixel area, and a control area, the control area is located between the main pixel area and the sub-pixel area, a first thin film transistor, a second thin film transistor, and a third thin film transistor are arranged in the control area, the third thin film transistor is arranged on the side of the first thin film transistor facing the main pixel area, the third thin film transistor is electrically connected to the first thin film transistor, the pixel electrode includes a first pixel electrode located in the main pixel area and a second pixel electrode located in the sub-pixel area, the first thin film transistor controls the first pixel electrode in the main pixel area, and the second thin film transistor controls the second pixel electrode in the sub-pixel area.

[0010] Optionally, in some embodiments of the present application, the first thin film transistor and the second thin film transistor are located on the same side of the adjacent data line, the first thin film transistor includes a first source, a first drain, and a first gate, and the second thin film transistor includes a second source, a second drain, and a second gate, wherein the first source and the second source are connected.

[0011] Optionally, in some embodiments of the present application, the main pixel area includes four first pixel domains with equal areas, the sub-pixel area includes four second pixel domains with equal areas, and the area of ​​the first pixel domain is larger than the area of ​​the second pixel domain.

[0012] Optionally, in some embodiments of the present application, the pixel structure further includes a shielding electrode for shielding a data line signal, and in the film thickness direction, the shielding electrode at least covers the data line.

[0013] Optionally, in some embodiments of the present application, the shielding electrode and the pixel electrode are arranged in the same layer.

[0014] Optionally, in some embodiments of the present application, the first connecting portion, the second connecting portion, the pixel electrode, and the extended electrode are made of the same material.

[0015] An embodiment of the present application provides a terminal device, which includes a pixel structure as described in any of the above embodiments.

[0016] Beneficial effect: By arranging at least two extended electrodes in parallel between the pixel electrode and the TFT device, and using at least two extended electrodes to connect the first connecting part and the second connecting part respectively, if any one of the extended electrodes is broken or short-circuited, the signal is transmitted through another normal extended electrode, which will not affect the signal transmission between the pixel electrode and the thin film transistor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a top view schematic diagram of a pixel structure in the pixel structure provided in the present application.

[0019] Description of reference numerals:

[0020] DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. The technical solutions described below are only used to explain and illustrate the ideas of the present application and should not be regarded as limiting the scope of protection of the present application.

[0022] In addition, the terms "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different technical features. The term "plurality" and similar words mean two or more, unless otherwise clearly defined.

[0023] See also Figure 1 The pixel structure provided in the present application includes a plurality of scan lines, a plurality of data lines, and a plurality of pixel units arranged in a matrix form, wherein the pixel unit includes a pixel electrode and a thin film transistor connected to the pixel electrode, wherein the pixel electrode includes a trunk electrode, a plurality of branch electrodes connected to the trunk electrode, and a first connection portion electrically connected to at least two of the branch electrodes; the thin film transistor includes a gate, a source and a drain, and the drain is connected to the first connection portion; wherein the pixel electrode also includes a second connection portion and at least two extended electrodes, wherein the second connection portion connects the at least two branch electrodes in parallel, and one end of at least two of the extended electrodes is electrically connected to the second connection portion respectively, and the other end of at least two of the extended electrodes is electrically connected to the first connection portion respectively.

[0024] The first connection part 30 is used as a signal output terminal of the thin film transistor 20, the second connection part 40 is used as a signal input terminal of the pixel electrode 10, and the extended electrode 50 is used to connect the first connection part 30 and the second connection part 40 to achieve electrical connection between the thin film transistor 20 and the pixel electrode 10.

[0025] In this embodiment, at least two extended electrodes 50 are provided, and the first connecting portion 30 and the second connecting portion 40 are connected by the extended electrodes 50. Since at least two extended electrodes 50 are respectively connected between the first connecting portion 30 and the second connecting portion 40, the breakage or short circuit of any extended electrode 50 will not affect the signal transmission between the pixel electrode 10 and the thin film transistor 20, thereby alleviating the technical problem of poor bright and dark spots caused by weak connection or breakage of the wiring in the existing pixel structure.

[0026] The technical solution of the present application is now described in conjunction with specific embodiments.

[0027] The embodiment of the present application is described by taking two extended electrodes 50 as an example. The number of the extended electrodes 50 may also be 3, 4, . . . , N, where N is greater than or equal to 3.

[0028] In addition, the pixel structure of the present application may include four pixel domains or eight pixel domains.

[0029] In one embodiment, the pixel structure may include a primary pixel region and a secondary pixel region.

[0030] The area of ​​the pixel electrode 10 in the main pixel region is larger than the area of ​​the pixel electrode 10 in the sub-pixel region.

[0031] The main pixel region and the sub-pixel region are electrically connected to at least two extended electrodes 50 respectively.

[0032] In one embodiment, the second connecting portion 40 connects at least two branch electrodes 102 in parallel.

[0033] It is understandable that, by connecting the second connection portion 40 in parallel with the two branch electrodes 102 , if the signal transmission of any branch electrode 102 is abnormal, the second connection portion 40 can receive the signal of the other branch electrode 102 , thereby improving the stability of signal transmission.

[0034] In one embodiment, the main pixel region includes four first pixel domains with equal areas, the sub-pixel region includes four second pixel domains with equal areas, and the areas of the first pixel domains are greater than those of the second pixel domains.

[0035] In one embodiment, the pixel structure includes a pixel region 1 and a control region 2 located at one side of the pixel region 1 , and the control region 2 is provided with a thin film transistor 20 .

[0036] In one embodiment, a first thin film transistor, a second thin film transistor, and a third thin film transistor are disposed in the control area 2. The third thin film transistor is disposed on the side of the first thin film transistor facing the main pixel area. The third thin film transistor is electrically connected to the first thin film transistor. The pixel electrode includes a first pixel electrode located in the main pixel area and a second pixel electrode located in the sub-pixel area. The first thin film transistor controls the first pixel electrode in the main pixel area, and the second thin film transistor controls the second pixel electrode in the sub-pixel area.

[0037] In one embodiment, see Figure 1 The first connecting portion 30 and the second connecting portion 40 are arranged in the same layer as the pixel electrode 10 .

[0038] The first connecting portion 30 , the second connecting portion 40 , and the pixel electrode 10 are arranged in the same layer.

[0039] The first connection part 30, the second connection part 40 and the pixel electrode 10 are made of the same material. It is understandable that there is no need to add an additional metal material layer to prepare the first connection part 30 and the second connection part. The first connection part 30 and the second connection part 40 are prepared while preparing the pixel electrode 10.

[0040] In one embodiment, see Figure 1 The extended electrode 50 is arranged in the same layer as the pixel electrode 10 .

[0041] It is understandable that since the first connecting part 30 and the second connecting part 40 are both in the same layer as the pixel electrode 10, the extended electrode 50 is also in the same layer as the pixel electrode 10, so the extended electrode 50 can be directly connected to the first connecting part 30 and the second connecting part 40 without the need for additional vias, which can simplify the process.

[0042] In one embodiment, see Figure 1 The extended electrode 50 includes a first extended portion 90 and a second extended portion 100 connected to the first extended portion 90, the extending direction of the first extended portion 90 is the same as the extending direction of the branch electrode 102, the second extended portion 100 is connected to the first connecting portion 30, and the second extended portion 100 and the second connecting portion 40 are parallel to the scanning line 70.

[0043] Understandably, Figure 1 Only the second extension electrode 502 is taken as an example for description. The first extension electrode 501 also includes the first extension portion 90 and the second extension portion 100 connected to the first extension portion 90 , which will not be described in detail herein.

[0044] In one embodiment, the extended electrode 50 at least includes a first extended electrode 501 and a second extended electrode 502 , and the first extended electrode 501 and the second extended electrode 502 are disposed in different layers.

[0045] It is understandable that when the number of extended electrodes 50 is large, for example, when the number of extended electrodes 50 is greater than or equal to 3, in order to avoid the extended electrodes 50 being set on the same layer resulting in too small wiring spacing and short circuit, some of the extended electrodes 50 can be set on other film layers and then connected to the first connecting part 30 and the second connecting part 40 respectively through vias.

[0046] In this embodiment, at least two extended electrodes 50 may be arranged in different layers to increase the wiring space of any layer of extended electrodes 50, increase the spacing between extended electrodes 50 and between extended electrodes 50 and other signal lines, and avoid short circuits in extended electrodes 50.

[0047] In one embodiment, the first extension electrode 501 is disposed in the same layer as the pixel electrode 10 , and the second extension electrode 502 is disposed in the same layer as the source electrode 201 and the drain electrode 202 .

[0048] The second extended electrode 502 is spaced apart from the source electrode 201 and the drain electrode 202 , and the second extended electrode 502 is connected to the first connecting portion 30 and the second connecting portion 40 through a via hole.

[0049] In this embodiment, the second extended electrode 502 is arranged in the same layer as the source 201 and the drain 202, and the second extended electrode 502 is formed while the source 201 and the drain 202 are prepared, thereby avoiding adding a process to prepare the second extended electrode 502, simplifying the process and reducing costs.

[0050] In one embodiment, the thin film transistor 20 further includes a gate 203 , the first extension electrode 501 is disposed at the same layer as the pixel electrode 10 , and the second extension electrode 502 is disposed at the same layer as the gate 203 .

[0051] The second extended electrode 502 is spaced apart from the gate 203 , and the second extended electrode 502 is connected to the first connecting portion 30 and the second connecting portion 40 through a via hole.

[0052] In this embodiment, the second extension electrode 502 is provided in the same layer as the gate 203 and the second extension electrode 502 is formed while the gate 203 is prepared, thereby avoiding an additional process for preparing the second extension electrode 502, simplifying the manufacturing process and reducing the cost.

[0053] In one embodiment, the second connecting portion 40 is connected to the vertical electrode 101 .

[0054] The vertical electrodes 101 are extended along the second direction.

[0055] The width of the vertical electrode 101 is greater than the width of the branch electrode 102 .

[0056] It is understandable that, compared with the branch electrode 102 , the vertical electrode 101 is wider, and when electrostatic breakdown or process abnormality occurs in the underlying metal material, the vertical electrode 101 is less likely to have a weak connection or a circuit break, thereby enhancing the stability of signal transmission.

[0057] In one embodiment, the pixel structure further includes a shielding electrode 80 , which is disposed in the same layer as the pixel electrode 10 , and in the film thickness direction, the shielding electrode 80 at least covers the data line 60 .

[0058] The shielding electrode 80 is used to prevent the signal of the data line 60 from interfering with the signals of other lines.

[0059] In one embodiment, along the second direction, two adjacent pixel structures share a control area 2, and the control area 2 includes a first source, a first drain, a second source, and a second drain, wherein the first source and the first drain are used to drive one of the two pixel structures, and the second source and the second drain are used to drive the other of the two pixel structures.

[0060] It can be understood that the first source and the second source can be connected to each other and share the same signal; the first source and the second source can also be connected to independent source control signals respectively.

[0061] In one embodiment, the first connecting portion, the second connecting portion, the pixel electrode, and the extension electrode are made of the same material.

[0062] The embodiment of the present application further provides a repair method for repairing the extended electrode 50 when an abnormality occurs in the extended electrode 50, which specifically includes:

[0063] When any of the extension electrodes 50 is short-circuited, the short-circuited extension electrode 50 is disconnected by laser, and the other extension electrode 50 assumes the function of current transmission.

[0064] The utility model adds a second connection part, connects the second connection part with at least two branch electrodes or with the vertical electrode, so that the signal can be output more stably through the second connection part. At the same time, at least two extension electrodes are arranged between the first connection part and the second connection part, and each extension electrode is independently connected to the first connection part and the second connection part. When any extension electrode is disconnected, the other extension electrode can assume the function of current transmission; further, when any extension electrode has a weak connection, the weakly connected extension electrode can be disconnected by laser, so that the other extension electrode can assume the function of current transmission.

[0065] The present application also proposes a terminal device, which includes the above-mentioned pixel structure, wherein the terminal device includes but is not limited to a mobile phone, a laptop computer, and a tablet computer.

[0066] The pixel structure provided by the embodiment of the present application includes a plurality of scanning lines, a plurality of data lines, and a plurality of pixel units arranged in a matrix form, wherein the pixel unit includes a pixel electrode and a thin film transistor connected to the pixel electrode, wherein the pixel electrode includes a trunk electrode, a plurality of branch electrodes connected to the trunk electrode, and a first connection portion electrically connected to at least two of the branch electrodes; the thin film transistor includes a gate, a source electrode and a drain electrode, and the drain electrode is connected to the first connection portion; wherein the pixel electrode also includes a second connection portion and at least two extended electrodes, wherein the second connection portion connects the at least two branch electrodes in parallel, wherein one end of at least two of the extended electrodes is electrically connected to the second connection portion, and the other end of at least two of the extended electrodes is electrically connected to the first connection portion; by providing at least two extended electrodes, the first connection portion and the second connection portion are connected by the extended electrodes, and since at least two extended electrodes are respectively connected between the first connection portion and the second connection portion, the signal transmission between the pixel electrode and the thin film transistor will not be affected if any one of the extended electrodes is broken or short-circuited, thereby alleviating the technical problem of poor light and dark spots caused by weak connection or breakage of the routing in the existing pixel structure.

[0067] The pixel structure provided by the embodiment of the present application is described in detail above. Without departing from the spirit and essential points of the present application, those skilled in the art may make various corresponding changes and deformations according to the present application, but these corresponding changes and deformations shall all fall within the protection scope of the claims attached to the present application.

Claims

1. A pixel structure, characterized in that: The device comprises a plurality of scanning lines, a plurality of data lines, and a plurality of pixel units arranged in a matrix form, wherein the pixel unit comprises a pixel electrode and a thin film transistor connected to the pixel electrode, wherein the pixel electrode comprises a trunk electrode, a plurality of branch electrodes connected to the trunk electrode, and a first connection portion electrically connected to at least two of the branch electrodes; the thin film transistor comprises a gate electrode, a source electrode, and a drain electrode, and the drain electrode is connected to the first connection portion; The pixel electrode further includes a second connecting portion and at least two extending electrodes, wherein the second connecting portion connects the at least two branch electrodes, one end of at least two extending electrodes are electrically connected to the second connecting portion, and the other end of at least two extending electrodes are electrically connected to the first connecting portion.

2. The pixel structure according to claim 1, characterized in that: The extension electrode is arranged in the same layer as the pixel electrode, and the two extension electrodes are electrically connected to the drain electrode respectively.

3. The pixel structure according to claim 1, wherein: The extended electrode includes a first extended portion and a second extended portion connected to the first extended portion, the extending direction of the first extended portion is the same as the extending direction of the branch electrode, the second extended portion is connected to the first connecting portion, and the second extended portion and the second connecting portion are parallel to the scanning line.

4. The pixel structure according to claim 1, wherein: The pixel unit includes a main pixel area, a sub-pixel area, and a control area. The control area is located between the main pixel area and the sub-pixel area. A first thin film transistor, a second thin film transistor, and a third thin film transistor are arranged in the control area. The third thin film transistor is arranged on the side of the first thin film transistor facing the main pixel area. The third thin film transistor is electrically connected to the first thin film transistor. The pixel electrode includes a first pixel electrode located in the main pixel area and a second pixel electrode located in the sub-pixel area. The first thin film transistor controls the first pixel electrode in the main pixel area, and the second thin film transistor controls the second pixel electrode in the sub-pixel area.

5. The pixel structure according to claim 4, characterized in that: The first thin film transistor and the second thin film transistor are located on the same side of the adjacent data line, the first thin film transistor includes a first source, a first drain, and a first gate, the second thin film transistor includes a second source, a second drain, and a second gate, wherein the first source and the second source are connected.

6. The pixel structure according to claim 4, characterized in that: The main pixel region includes four first pixel domains with equal areas, and the sub-pixel region includes four second pixel domains with equal areas, and the areas of the first pixel domains are greater than those of the second pixel domains.

7. The pixel structure according to claim 1, wherein: The pixel structure further includes a shielding electrode for shielding a data line signal. In the film thickness direction, the shielding electrode at least covers the data line.

8. The pixel structure according to claim 7, characterized in that: The shielding electrode and the pixel electrode are arranged in the same layer.

9. The pixel structure according to claim 1, wherein: The first connecting portion, the second connecting portion, the pixel electrode, and the extending electrode are made of the same material.

10. A terminal device, characterized in that: The terminal device comprises the pixel structure as described in any one of claims 1 to 9.

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