CN111812882B - Display panel and display device - Google Patents

Abstract

The present application proposes a display panel and a display device, including a first substrate and a second substrate; the display panel includes a display area and a drive circuit area located on the periphery of the display area, and the drive circuit area is provided with a device located on the first substrate. A gate drive circuit on the gate drive circuit and a light-shielding member located on the gate drive circuit; the gate drive circuit includes a semiconductor region, and the orthographic projection of the light-shield member on the gate drive circuit covers the semiconductor region. In this application, the light-shielding material in the gate drive circuit area is divided into blocks, so that the channel area in the active layer is covered by the light-shielding member, and other areas are provided with transparent materials to be visible, which not only ensures that the external light source illuminates the channel area Affecting the leakage current of the thin film transistor can also make the gate drive circuit visible during the product lighting test, and can quickly detect the abnormal position of the gate drive circuit and perform circuit repair, improving the yield and quality of the product.

Description

Display panel and display device

technical field

The present application relates to the display field, in particular to a display panel and a display device.

Background technique

LCD (Liquid crystal displays, liquid crystal display) is a widely used flat panel display, which mainly realizes picture display by modulating the light field intensity of the backlight source through liquid crystal switches.

In the existing LCD panel, due to electrostatic breakdown or dust falling into the gate drive circuit area during the production of the array substrate, the gate drive circuit is abnormal. The substrate is inspected. And because the color filter substrate is provided with a light-shielding black matrix in the frame area, even if the gate drive circuit is abnormal, the inspector cannot obtain the specific location of the abnormality, and cannot repair the gate drive circuit, resulting in a decrease in product yield.

Therefore, there is an urgent need for a display panel to solve the above technical problems.

Contents of the invention

The present application provides a display panel and a display device to solve the technical problem that the existing liquid crystal display panel cannot obtain the position of the abnormal point of the gate driving circuit during testing.

In order to solve the above problems, the technical scheme provided by the application is as follows:

The present application proposes a display panel, which includes a first substrate, a second substrate opposite to the first substrate, and a liquid crystal layer located between the first substrate and the second substrate;

The display panel includes a display area and a drive circuit area located on the periphery of the display area, and the drive circuit area is provided with a gate drive circuit on the first substrate and a light shielding circuit on the gate drive circuit. member;

Wherein, the gate drive circuit includes a semiconductor region, and the orthographic projection of the light shielding member on the gate drive circuit covers the semiconductor region.

In the display panel of the present application, the gate drive circuit includes at least two thin film transistors, any of the thin film transistors includes a gate layer, a source and drain layer, and a layer between the gate layer and the source and drain layer. the active layer between;

Wherein, the active layer is located in the semiconductor region.

In the display panel of the present application, the light shielding member includes a first light shielding layer on the first substrate, a second light shielding layer between the first substrate and the second substrate, or the first light shielding layer. At least one of the third light-shielding layers on the second substrate.

In the display panel of the present application, the second light-shielding layer is embedded in the sealant of the display panel.

In the display panel of the present application, the orthographic projection area of the third light-shielding layer on the first substrate is larger than the orthographic projection area of the second light-shielding layer on the first substrate, and the second light-shielding layer The area of the orthographic projection on the first substrate is larger than the area of the orthographic projection of the first light-shielding layer on the first substrate.

In the display panel of the present application, the driving circuit area further includes a transparent light-shielding conversion layer located on the gate driving circuit;

In the top view direction of the display panel, there is at least a first overlapping portion between the transparent light-shielding conversion layer and the light-shielding member, and the area of the first overlapping portion is greater than or equal to zero.

In the display panel of the present application, the transparent light-shielding conversion layer is converted from a transparent state to a light-shielding state through a predetermined process;

Wherein, when the display panel is tested, the transparent light-shielding conversion layer is in a transparent state; when the display panel is tested, the transparent light-shielding conversion layer is converted into a light-shielding state through a predetermined process.

In the display panel of the present application, the gate drive circuit area includes a first area covered by the light shielding member and a second area other than the first light shielding area;

Wherein, when the display panel is tested, the driving circuit structure in the second area is in a visible state.

In the display panel of the present application, the transparent light-shielding conversion layer and the light-shielding member are provided in the same layer, and the transparent light-shielding conversion layer and the light-shielding member are formed by the same photomask process.

The present application also proposes a display device, wherein the display device includes the above-mentioned display panel, and a casing for accommodating the display panel;

Wherein, the gate driving circuit area of the display panel is blocked by the casing.

Beneficial effects: the application blocks the light-shielding material in the gate drive circuit area, so that the channel area in the active layer is covered by the light-shielding member, and other areas are provided with transparent materials that can be seen, which not only ensures that the external light source is illuminated The channel region affects the leakage current of the thin film transistor, and enables the gate drive circuit to be visualized during the product lighting test. It can quickly detect the abnormal position of the gate drive circuit and perform circuit repair, which improves the yield rate of the product. and quality.

Description of drawings

The technical solutions and other beneficial effects of the present application will be apparent through the detailed description of the specific embodiments of the present application below in conjunction with the accompanying drawings.

Fig. 1 is the first structural diagram of the display panel of the present application;

FIG. 2 is a top view structural diagram of the display panel of the present application;

FIG. 3 is a second structure diagram of the display panel of the present application;

FIG. 4 is a third structure diagram of the display panel of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Apparently, the described embodiments are only some of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as limiting the application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of said features. In the description of the present application, "plurality" means two or more, unless otherwise specifically defined.

In the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected, or electrically connected, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction of two components relation. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

In this application, unless otherwise expressly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

The following disclosure provides many different implementations or examples for implementing different structures of the present application. To simplify the disclosure of the present application, components and arrangements of specific examples are described below. Of course, they are examples only and are not intended to limit the application. Furthermore, the present application may repeat reference numerals and/or reference letters in various instances, such repetition is for simplicity and clarity and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed. In addition, various specific process and material examples are provided herein, but one of ordinary skill in the art may recognize the use of other processes and/or the use of other materials.

In the existing LCD panel, since the color filter substrate is provided with a light-shielding black matrix in the frame area, even if the gate drive circuit is abnormal, the inspector cannot obtain the specific location of the abnormality, and cannot repair the gate drive circuit. lead to a decrease in product yield.

Please refer to FIGS. 1-4 , the present application proposes a display panel 100, which includes a first substrate 10, a second substrate 20 opposite to the first substrate 10, and a display panel located between the first substrate 10 and the first substrate 10. The liquid crystal layer 30 between the second substrates 20 is described above.

The display panel 100 includes a display area 200 and a drive circuit area 400 located on the periphery of the display area 200, and a gate drive circuit (not shown) located on the first substrate 10 is arranged in the drive circuit area 400 and a light shielding member 40 located on the gate drive circuit;

In this embodiment, the gate driving circuit includes a semiconductor region, and the orthographic projection of the light shielding member 40 on the gate driving circuit covers the semiconductor region.

In this application, the light-shielding material in the gate drive circuit area 400 is divided into blocks, so that the channel area in the active layer is covered by the light-shielding member 40, and other areas are provided with transparent materials to be visible, which ensures that the external light source illuminates the groove. The channel area affects the leakage current of the thin film transistor, and can make the gate drive circuit visible during the product lighting test, and can quickly detect the abnormal position of the gate drive circuit and perform circuit repairs, which improves the yield rate of the product and quality.

The technical solution of the present application will now be described in conjunction with specific embodiments.

Referring to FIG. 1 , the first substrate 10 may be an array substrate, and the second substrate 20 may be a color filter substrate. The first substrate and the second substrate may be one of a rigid substrate or a flexible substrate. When the first substrate and the second substrate are rigid substrates, the materials of the first substrate and the second substrate can be made of glass, quartz and other materials. When the first substrate and the second substrate are flexible substrates, the first substrate and the second substrate may be materials such as polyimide. In the LCD display panel 100 , the substrate structure is generally set as a rigid substrate, which will not be described in detail here.

In this embodiment, the array substrate may be a conventional array substrate or a COA (Color filter on Array, a substrate on which a color filter layer is disposed on an array), which is not specifically limited in this application. In the following embodiments, the present application first takes a conventional array substrate as an example for illustration.

The driving circuit layer includes a plurality of thin film transistors. The thin film transistor may be of etch barrier type, back channel etching type, or top gate thin film transistor type, and is not specifically limited. For example, the thin film transistor of bottom gate thin film transistor type may include a gate layer on the first substrate, a gate insulating layer on the gate layer, an active layer on the gate insulating layer, A source-drain layer on the active layer, and a passivation layer on the source-drain layer. Since the above-mentioned structures are all prior art, they will not be repeated here.

Please refer to FIG. 2 , the display panel 100 includes a display area 200 and a non-display area 300 located on the periphery of the display area 200, and a gate drive circuit area 400 is arranged in the non-display area 300, that is, GOA (Gate on Array , gate drive circuit).

In this embodiment, the specific structure of the gate driving circuit is not specifically limited in this application.

In the display panel 100 of the present application, the gate drive circuit may include at least two thin film transistors, any of the thin film transistors includes a gate layer, a source and drain layer, and a layer between the gate layer and the source and drain. The active layer between the electrode layers, the active layer is located in the semiconductor region, that is, this application mainly covers the channel region of the active layer.

For example, a conventional one-level GOA unit in the prior art usually includes a pull-up module, a pull-up sustain module, a pull-down module and a pull-down sustain module, which are composed of 17 thin film transistors. However, the light-shielding member 40 of the present application mainly covers the channel region of the active layer in the thin film transistor, so as to prevent external light from irradiating the channel region and affecting the leakage current of the thin film transistor.

In this embodiment, the light shielding member 40 only needs to cover the channel region of the active layer, so the specific position of the light shielding member 40 is mainly located on the gate driving circuit. For example, the light-shielding member 40 may be located on the first substrate 10, that is, be in direct contact with the gate drive circuit, and completely cover the channel region of the active layer; or, the light-shielding member 40 may The structure located between the first substrate 10 and the second substrate 20, that is, the light shielding member 40 can be embedded in the sealant 50 between the first substrate 10 and the second substrate 20; Alternatively, the light-shielding member 40 may be located on the second substrate 20, that is, the color filter substrate in this embodiment, and pattern the black matrix of the original frame area, leaving only the part covering the channel area of the active layer .

In this embodiment, the light shielding member 40 may include a first light shielding layer 41 on the first substrate 10 , a second light shielding layer 42 between the first substrate 10 and the second substrate 20 , or at least one of the third light-shielding layer 43 on the second substrate 20 . That is, the light-shielding member 40 may be any one of the above three embodiments, or a combination of any two, or a combination of the three embodiments.

Referring to FIG. 1 , the light-shielding member 40 may only include a third light-shielding layer 43 , and the third light-shielding layer 43 is located on any film layer on the second substrate 20 , and the specific position is not specifically limited in this application.

In this embodiment, the second light-shielding layer 42 may be embedded in the sealant 50 of the display panel 100 . Since the setting of the sealant 50 needs to occupy a certain distance between the frame of the display panel 100, and the gate drive circuit area 400 also belongs to the non-display area 300, the present application integrates the sealant 50 and the gate drive circuit area 400 to reduce the size of the frame. The spacing between the borders of the display panel 100 . However, the second light-shielding layer 42 of the present application can be embedded in any position in the sealant 50 as long as the second light-shielding layer 42 shields the channel region of the active layer.

Referring to FIG. 3 , the light shielding member 40 includes the first light shielding layer 41 , the second light shielding layer 42 , and the third light shielding layer 43 arranged from bottom to top. In this embodiment, the area of the orthographic projection of the third light-shielding layer 43 on the first substrate 10 is larger than the area of the orthographic projection of the second light-shielding layer 42 on the first substrate 10 , and the second light-shielding layer 42 The orthographic area of the light-shielding layer 42 on the first substrate 10 is larger than the orthographic area of the first light-shielding layer 41 on the first substrate 10 .

Since the channel region of the active layer is illuminated to affect the leakage current of the thin film transistor, the arrangement of the light shielding member 40 should consider the technical problem of covering the channel region. Since the first light-shielding layer 41, the second light-shielding layer 42, and the third light-shielding layer 43 are arranged from bottom to top, there is a certain incident angle after natural light enters the display panel 100. The light-shielding layer of the source layer should have a larger shielding area to fully cover the channel region, and the light-shielding layer close to the active layer can be provided with a smaller shielding panel to fully cover the channel region.

In addition, after the display panel 100 completes the box forming process, it is necessary to perform a lighting test on the panel to determine whether the panel is abnormal. Since the gate drive circuit area 400 has technical problems such as electrostatic breakdown or dust falling in, it is necessary to accurately determine the abnormal position of the gate drive circuit area 400 during the test, that is, the gate drive circuit area 400 needs to be removed. Visible to testers. Therefore, the setting of the shielding areas of the first light-shielding layer 41 , the second light-shielding layer 42 , and the third light-shielding layer 43 only needs to ensure that other regions except the channel region can be seen by the operator.

In the display panel 100 of the present application, the driving circuit region 400 further includes a transparent light-shielding conversion layer 60 located on the gate driving circuit. In the top view direction of the display panel 100 , there is at least a first overlapping portion 70 between the transparent light-shielding conversion layer 60 and the light-shielding member 40 , and the area of the first overlapping portion 70 is greater than or equal to zero.

Please refer to FIG. 4 , there is the first overlapping portion 70 between the transparent light-shielding conversion layer 60 and the light-shielding member 40 , and the area of the first overlapping portion 70 is greater than 0. The specific area of the first overlapping portion 70 The present application does not make specific limitations, as long as the diffraction of external light from the area between the two is avoided.

In this embodiment, the transparent light-shielding conversion layer 60 is converted from a transparent state to a light-shielding state through a predetermined process. When the display panel 100 undergoes a lighting test, the transparent light-shielding conversion layer 60 is in a transparent state; when the display panel 100 completes a lighting test, the transparent light-shielding conversion layer 60 is converted into a light-shielding state through a predetermined process.

For example, the material of the transparent light-shielding conversion layer 60 can be polymer dispersed liquid crystal (polymer dispersed liquid crystal, PDLC), which is that the liquid crystal is dispersed in the organic solid polymer matrix with micron-scale droplets. The optical axis of the small droplet is in a free orientation, and its refractive index does not match that of the substrate. When the light passes through the substrate, it is strongly scattered by the droplet and presents an opaque milky white state or a translucent state. Applying an electric field can adjust the orientation of the optical axis of the liquid crystal droplet, and when the refractive index of the two is matched, it will appear transparent. When the electric field is removed, the liquid crystal droplets return to the original astigmatism state, thereby displaying.

When the display panel 100 is performing a lighting test, the transparent light-shielding conversion layer 60 is in a transparent state by applying an external voltage or other pressure methods, and when the gate drive circuit region 400 of the display panel 100 is abnormal, its The circuit repair growth can be directly performed on the gate drive circuit by laser, without dismantling the product. After the display panel 100 completes the lighting test, it can remove the external voltage, so that the transparent light-shielding conversion layer 60 is in a light-shielding state.

In this embodiment, the material of the transparent light-shielding conversion layer 60 is not limited to the above-mentioned polymer dispersed liquid crystal, and any material satisfying the above characteristics can be applied to the transparent light-shielding conversion layer 60 .

As shown in FIG. 4 , the types of light-shielding members 40 corresponding to the gate drive circuit areas 400 on the left and right sides of the display panel 100 may be the same or different, and may be adjusted according to requirements, which is not limited here.

In the display panel 100 of the present application, the gate driving circuit area 400 includes a first area covered by the light shielding member 40 and a second area other than the first light shielding area. When the display panel 100 is performing a lighting test, the driving circuit structure in the second area is in a visible state.

In this embodiment, in the second area of the gate driving circuit area 400, since the gate driving circuit needs to be visible to the tester during the product testing stage, the structures on this area can be transparent. The material is configured so that the region of the gate driving circuit region 400 except the first region is visible.

In this embodiment, the transparent light-shielding conversion layer 60 can be provided on the same layer as the light-shielding member 40 , and the transparent light-shielding conversion layer 60 and the light-shielding member 40 can be formed by the same photomask process. The transparent light-shielding conversion layer 60 and the light-shielding member 40 can be made of the same material, and the light-shielding member 40 is processed by a predetermined process to form a light-shielding state, while the transparent light-shielding conversion layer 60 can be formed into a transparent state without a predetermined process. state.

The present application also proposes a display device, wherein the display device includes the above-mentioned display panel and a casing for accommodating the display panel. The gate driving circuit area of the display panel is blocked by the casing.

In this embodiment, the working principle of the display device can refer to the above-mentioned display panel, which will not be repeated here. In addition, the setting of the casing makes the gate drive circuit area further shielded, that is, the double arrangement of the casing and the transparent light-shielding conversion layer prevents the channel region of the thin film transistor from causing leakage current due to light. Impact.

The present application proposes a display panel and a display device, including a first substrate and a second substrate; the display panel includes a display area and a drive circuit area located on the periphery of the display area, and the drive circuit area is provided with a The gate drive circuit on the first substrate and the light-shielding member on the gate drive circuit; the gate drive circuit includes a semiconductor region, and the orthographic projection of the light-shielding member on the gate drive circuit covers the the semiconductor region. In this application, the light-shielding material in the gate drive circuit area is divided into blocks, so that the channel area in the active layer is covered by the light-shielding member, and other areas are provided with transparent materials to be visible, which not only ensures that the external light source illuminates the channel area Affecting the leakage current of the thin film transistor can also make the gate drive circuit visible during the lighting test of the product, and can quickly detect the abnormal position of the gate drive circuit and perform circuit repair, improving the yield and quality of the product.

In the foregoing embodiments, the descriptions of each embodiment have their own emphases, and for parts not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments.

A display panel and a display device provided by the embodiments of the present application have been introduced in detail above. In this paper, specific examples are used to illustrate the principles and implementation methods of the present application. The descriptions of the above embodiments are only used to help understand the present application. technical solutions and their core ideas; those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements, and The essence of the corresponding technical solutions does not depart from the scope of the technical solutions of the embodiments of the present application.

Claims (9)

1. A display panel, characterized in that it comprises a first substrate, a second substrate opposite to the first substrate, and a liquid crystal layer located between the first substrate and the second substrate; The display panel includes a display area and a drive circuit area located on the periphery of the display area, and the drive circuit area is provided with a gate drive circuit on the first substrate and a light shielding circuit on the gate drive circuit. member; Wherein, the gate drive circuit includes a semiconductor region, and the orthographic projection of the light shielding member on the gate drive circuit covers the semiconductor region; The light shielding member includes a first light shielding layer on the first substrate, a second light shielding layer between the first substrate and the second substrate, or a third light shielding layer on the second substrate In at least one of them, the second light-shielding layer is embedded in the sealant of the display panel. 2. The display panel according to claim 1, wherein the gate driving circuit comprises at least two thin film transistors, any one of the thin film transistors comprises a gate layer, a source and drain layer, and a layer and the active layer between the source and drain layers; Wherein, the active layer is located in the semiconductor region. 3. The display panel according to claim 1, wherein the orthographic projection area of the third light-shielding layer on the first substrate is larger than the orthographic projection area of the second light-shielding layer on the first substrate The area of the orthographic projection of the second light-shielding layer on the first substrate is larger than the orthographic area of the first light-shielding layer on the first substrate. 4. A display panel, characterized in that it comprises a first substrate, a second substrate opposite to the first substrate, and a liquid crystal layer located between the first substrate and the second substrate; The display panel includes a display area and a drive circuit area located on the periphery of the display area, and the drive circuit area is provided with a gate drive circuit on the first substrate and a light shielding circuit on the gate drive circuit. member; Wherein, the gate drive circuit includes a semiconductor region, the orthographic projection of the light shielding member on the gate drive circuit covers the semiconductor region, and the light shielding member includes a first light shielding layer on the first substrate , at least one of a second light-shielding layer located between the first substrate and the second substrate, or a third light-shielding layer on the second substrate; Wherein, the driving circuit area further includes a transparent light-shielding conversion layer located on the gate driving circuit; In the top view direction of the display panel, there is at least a first overlapping portion between the transparent light-shielding conversion layer and the light-shielding member, and the area of the first overlapping portion is greater than or equal to zero. 5. The display panel according to claim 4, wherein the transparent light-shielding conversion layer is converted from a transparent state to a light-shielding state through a predetermined process; Wherein, when the display panel is tested, the transparent light-shielding conversion layer is in a transparent state; when the display panel is tested, the transparent light-shielding conversion layer is converted into a light-shielding state through a predetermined process. 6. The display panel according to claim 5, wherein the gate drive circuit area comprises a first area covered by the light shielding member and a second area other than the first area; When the display panel is tested, the driving circuit structure in the second area is in a visible state. 7 . The display panel according to claim 4 , wherein the transparent light-shielding conversion layer and the light-shielding member are provided in the same layer, and the transparent light-shielding conversion layer and the light-shielding member are formed by the same photomask process. 8. The display panel according to claim 4, wherein the gate drive circuit comprises at least two thin film transistors, any one of the thin film transistors comprises a gate layer, a source and drain layer, and a layer and the active layer between the source and drain layers; Wherein, the active layer is located in the semiconductor region. 9. A display device, characterized in that the display device comprises the display panel according to any one of claims 1 to 8, and a casing for accommodating the display panel; Wherein, the gate driving circuit area of the display panel is blocked by the casing.

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