Frameless liquid crystal panel and display device

Abstract

The application discloses a kind of frameless liquid crystal panel and display device, including color film layer and thin film transistor layer, color film layer is arranged on thin film transistor layer and is electrically connected with thin film transistor layer, adapter layer is arranged with color film layer and partially extends thin film transistor layer, the side of adapter layer close to thin film transistor layer is equipped with conductive layer, and conductive layer is electrically connected with thin film transistor layer;COF one end is connected to the side of adapter layer close to thin film transistor layer, and the other end is connected to flexible circuit board.According to the technical scheme provided in the embodiment of the application, the COF is bonded on the extended adapter layer, there is no COF connection bonding position from the display surface of the liquid crystal panel, the COF bonding area is hidden, and there is no need to set the frame to shield the corresponding COF bonding area, to realize the effect of frameless liquid crystal panel four sides.

Description

Technical Field

[0001] This invention generally relates to the field of display technology, and more particularly to borderless liquid crystal panels and display devices. Background Technology

[0002] An LCD screen is a type of flat panel display, commonly used in television and computer screens. Its advantages include low power consumption, small size, and low radiation.

[0003] However, due to the circuit connection and process issues of COF (Chip on FPC) side in LCD panels, the COF lines are generally connected on the thin-film transistor layer and cannot be hidden, thus making it impossible to achieve a frameless design on all four sides.

[0004] In addition, some OEMs have added a condensation test to their reliability tests. On the side where the COF is bonded to the thin-film transistor, that is, at the junction of the original thin-film transistor and the color filter layer, there is a certain gap and space. The salt water in the condensation test will remain in this gap and space, causing the conductive layer on the color filter layer, such as ITO, to be easily electrochemically corroded by the salt water, making it unable to pass the test. Summary of the Invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a frameless liquid crystal panel and display device.

[0006] In a first aspect, a borderless liquid crystal panel is provided, comprising: a color filter layer and a thin-film transistor layer, wherein the color filter layer is disposed on the thin-film transistor layer and electrically connected to the thin-film transistor layer.

[0007] A transition layer is provided on the same layer as the color filter layer and extends partially out of the thin film transistor layer. A conductive layer is provided on the side of the transition layer near the thin film transistor layer, and the conductive layer is electrically connected to the thin film transistor layer.

[0008] COF, one end of which is connected to the side of the adapter layer near the thin film transistor layer, and the other end is connected to the flexible circuit board.

[0009] Secondly, a display device is provided, including the aforementioned frameless liquid crystal panel.

[0010] According to the technical solution provided in the embodiments of this application, by adding a transition layer at the same position as the color filter layer, both the color filter layer and the transition layer are electrically connected to the underlying thin film transistor layer. The transition layer is electrically connected to the thin film transistor layer and extends out of the thin film transistor layer. The COF is bonded to the extended transition layer. From the display surface of the liquid crystal panel, there is no position where the COF is bonded, thus hiding the COF bonding area. Therefore, there is no need to set a frame to block the corresponding COF bonding area, achieving the effect of a frameless liquid crystal panel on all four sides. Attached Figure Description

[0011] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0012] Figure 1 This is a schematic diagram of the frameless liquid crystal panel structure in one embodiment;

[0013] Figure 2 This is a schematic diagram of the frameless liquid crystal panel structure in another embodiment. Detailed Implementation

[0014] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0015] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0016] Please refer to Figure 1 and Figure 2 This application provides a borderless liquid crystal panel, including: a color filter layer 1 and a thin-film transistor layer 2, wherein the color filter layer 1 is disposed on the thin-film transistor layer 2 and electrically connected to the thin-film transistor layer 2.

[0017] The transition layer 3 is disposed in the same layer as the color filter layer 1 and partially extends out of the thin film transistor layer 2. A conductive layer is provided on the side of the transition layer 3 near the thin film transistor layer 2, and the conductive layer is electrically connected to the thin film transistor layer 2.

[0018] COF4, one end of which is connected to the side of the adapter layer 3 near the thin film transistor layer 2, and the other end is connected to the flexible circuit board 7.

[0019] The liquid crystal panel provided in this application adds a transition layer 3 at the same position as the color filter layer 1, and electrically connects both the color filter layer 1 and the transition layer 3 to the underlying thin film transistor layer 2. The transition layer 3 is electrically connected to the thin film transistor layer 2 and extends out of the thin film transistor layer 2. COF4 is bonded to the extended transition layer 3. From the display surface of the liquid crystal panel, there is no position where COF4 is bonded, thus hiding the COF4 bonding area. Therefore, there is no need to set a frame to block the corresponding COF4 bonding area, achieving a frameless effect on all four sides of the liquid crystal panel.

[0020] In existing technologies, liquid crystal display panels typically have a bezel at the bottom to cover the area bonded to COF4. This application references... Figure 1 and Figure 2 As shown, a transition layer 3 is disposed on the thin-film transistor layer 2, and a conductive layer is provided to achieve electrical connection with the thin-film transistor layer 2. The area of ​​the thin-film transistor layer 2 that was originally exposed and bonded to the COF4 is covered up. The bonding position between the thin-film transistor layer 2 and the COF4 is transferred to the transition layer 3, and the transition layer 3 extends out of the thin-film transistor, with the extended portion used for bonding with the COF4. Furthermore, in this embodiment... Figure 1 and Figure 2 This indicates that the liquid crystal panel has a display surface A and a non-display surface B. Originally, the area where COF4 and thin film transistors were bonded was on the display surface A of the liquid crystal panel. By setting the transition layer 3, the area where COF4 is bonded is set on the non-display surface B, thus achieving a borderless effect on the display surface of the liquid crystal panel.

[0021] Furthermore, it also includes an upper polarizer 5 and a lower polarizer 6, wherein the upper polarizer 5 is disposed on the side of the color filter layer 1 away from the thin film transistor layer 2, and the lower polarizer 6 is disposed on the side of the thin film transistor layer 2 away from the color filter layer 1.

[0022] The upper polarizer 5 is disposed over the color filter layer 1 and the transition layer 3.

[0023] In this embodiment, the liquid crystal panel is provided with upper and lower polarizers 6, respectively. The upper polarizer 5 is disposed on the display surface, and the lower polarizer 6 is disposed on the non-display surface. The upper polarizer 5 covers the color filter layer 1 and the additionally provided transition layer 3, and completely covers the color filter layer 1 and the transition layer 3, forming... Figure 1 and Figure 2 As shown, this setup completely covers the color filter layer 1 and the transition layer 3 with the upper polarizer 5. From the display surface, no obstructing border structure is needed at this position. Combined with the settings at other positions, a borderless structure is achieved on all four sides.

[0024] Optionally, the transition layer 3 includes a substrate layer, and the conductive layer is provided on the side of the substrate layer close to the thin film transistor layer 2.

[0025] like Figure 1 As shown, in the panel structure provided in this embodiment, the transition layer 3 is implemented through other structures. Specifically, a substrate layer is provided, and a conductive layer is formed on the substrate layer. This conductive layer is electrically connected to the thin film transistor layer 2 on one hand, and connected to COF4 on the other hand to achieve bonding of COF4. The substrate layer can be a glass substrate or a substrate of other materials.

[0026] Furthermore, the transition layer 3 is disposed adjacent to the color filter layer 1.

[0027] In existing liquid crystal panels, COF4 is bonded to the side of the thin film transistor layer 2 near the upper polarizer 5. Therefore, there is a certain gap and space between COF4 and the color filter layer 1. With the structure in this embodiment, the transition layer 3 is set close to the color filter layer 1, and there is no gap between the transition layer 3 and the color filter layer 1. The upper polarizer 5 also covers the transition layer 3 and the color filter layer 1. Therefore, the salt water required for the test will not remain next to the color filter layer 1, and the conductive structure in the color filter layer 1 will not be corroded.

[0028] Furthermore, the transition layer 3 has the same thickness as the color filter layer 1.

[0029] The panel provided in this embodiment has a transition layer 3 disposed on the same layer next to the color filter layer 1. In order to ensure the flatness of the upper polarizer 5, the thickness of the transition layer 3 is set to be the same as the thickness of the color filter layer 1, which facilitates the placement of the upper polarizer 5 and the flatness of the entire display panel.

[0030] This embodiment also provides Figure 1 The method for fabricating the liquid crystal panel shown involves firstly, the thin-film transistor layer 2 and the color filter layer 1 being assembled into a cell using existing technology. The color filter layer 1 does not completely cover the thin-film transistor layer 2, exposing a portion of the structure. This exposed portion is typically used for bonding COF4.

[0031] A glass substrate is provided, and a conductive layer for conducting electricity is formed on one side of the glass substrate to form a transition layer 3 structure. The transition layer 3 is attached to the exposed part of the thin film transistor, and the transition layer 3 is pressed to the terminal of the thin film transistor layer 2 so that the transition layer 3 and the thin film transistor layer 2 are connected.

[0032] Then, using frame adhesive, the transition layer 3 and the thin-film transistor layer 2 are bonded together.

[0033] Then, the upper and lower polarizers 6 are pasted on, and the upper polarizer 5 completely covers the color filter layer 1 and the transition layer 3.

[0034] Then, the COF4 is flipped to bond. At this time, the COF4 is bonded on the side of the transition layer 3 near the thin film transistor layer 2. Compared with the existing bonding position, the terminal surface of the COF4 bonding position has changed direction. The other end of the COF4 is connected to the flexible circuit board 7.

[0035] Optionally, the transition layer 3 is a part of the color filter layer 1.

[0036] like Figure 2 As shown, in the panel structure provided in this embodiment, the transition layer 3 is set as part of the color filter layer 1. The setting method is simple, and the color filter layer 1 can be set over a large area. The color filter layer 1 extends beyond the thin film transistor layer 2, and a corresponding conductive layer is set on the side of the extended part near the thin film transistor layer 2. The conductive layer is used to bond with COF4 to achieve electrical connection. Since the color filter layer 1 extends beyond the thin film transistor layer 2, when conducting condensation tests, the salt water used in the test can flow down along each film layer and will not accumulate at the position of the color filter layer 1, so it will not affect the electrodes at the position of the color filter layer 1. At the same time, similar to the above embodiment, this setting method moves the bonding position of COF4 to the non-display surface, that is, the back side of the color filter layer 1, so that the bonding position of COF4 does not need to be set with a border, realizing a borderless liquid crystal panel.

[0037] This embodiment also provides Figure 2 The method for fabricating a liquid crystal panel shown first provides a color filter layer 1. The color filter layer 1 needs to extend beyond the thin film transistor layer 2 by a certain range at the COF4 bonding position. A conductive layer is provided on the side of the color filter layer 1 close to the thin film transistor layer 2, which is used to electrically connect with the thin film transistor layer 2 and achieve COF4 bonding.

[0038] Then, the color filter layer 1 is crimped and connected to the terminals on the thin-film transistor layer 2;

[0039] Then, the upper and lower polarizers 6 are pasted on, and the upper polarizer 5 completely covers the color filter layer 1 (including the position of the transition layer 3);

[0040] Then, the COF4 is flipped to bond. At this time, the COF4 is bonded to the side of the color filter layer 1 that extends out and is close to the thin film transistor layer 2. Compared with the existing bonding position, the terminal surface of the COF4 bonding position has changed direction. The other end of the COF4 is connected to the flexible circuit board 7.

[0041] Optionally, the conductive layer on the transition layer 3 is bonded to the thin-film transistor layer 2 using ACF adhesive.

[0042] In the above embodiments, in order to achieve electrical connection between the transition layer 3 and the thin film transistor layer 2, ACF adhesive is used to achieve crimping connection, making the connection simpler and easier to operate.

[0043] Furthermore, one end of the COF4 is connected to the portion of the transition layer 3 that extends out of the thin-film transistor layer 2.

[0044] In this application, by changing the position of the COF4 bonding, the original COF4 bonding position no longer needs to be covered by a border, enabling the LCD panel to achieve a borderless design on all four sides; preferably, this application flips the position of the COF4 bonding to form... Figure 1 and Figure 2 The structure shown has COF4 bonded to the non-display surface, which is the part of the transition layer 3 that extends out of the thin-film transistor layer 2.

[0045] The structure of the liquid crystal panel provided in this application only includes the structure of the COF4 bonding area; other parts, such as the display area, are not shown or disclosed.

[0046] This embodiment also provides a display device, including the above-described frameless liquid crystal panel.

[0047] The display device provided in this application uses the aforementioned panel, which enables a frameless structure on all four sides.

[0048] It should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used above to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention; the directional terms "inner" and "outer" refer to the inside or outside relative to the outline of each component itself. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0049] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, rotated 90 degrees, or in other orientations, and the spatial relative descriptions used herein will be interpreted accordingly.

[0050] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A frameless LCD panel, characterized in that, include: A color filter layer and a thin-film transistor layer, wherein the color filter layer is disposed on the thin-film transistor layer and electrically connected to the thin-film transistor layer. A transition layer is provided on the same layer as the color filter layer and partially extends out of the thin-film transistor layer. A conductive layer is provided on the side of the transition layer near the thin-film transistor layer, and the conductive layer is electrically connected to the thin-film transistor layer. The transition layer includes a substrate layer, and the conductive layer is provided on the side of the substrate layer near the thin-film transistor layer. The transition layer is disposed adjacent to the color filter layer. COF, one end of which is connected to the side of the adapter layer near the thin film transistor layer, and the other end is connected to the flexible circuit board.

2. The frameless LCD panel according to claim 1, characterized in that, It also includes an upper polarizer and a lower polarizer, wherein the upper polarizer is disposed on the side of the color filter layer away from the thin film transistor layer, and the lower polarizer is disposed on the side of the thin film transistor layer away from the color filter layer; The upper polarizer covers the color filter layer and the transition layer.

3. The frameless LCD panel according to claim 1, characterized in that, The transition layer has the same thickness as the color filter layer.

4. The frameless liquid crystal panel according to claim 1 or 2, characterized in that, The transition layer is part of the color filter layer.

5. The frameless liquid crystal panel according to claim 1 or 2, characterized in that, The conductive layer on the transition layer is bonded to the thin-film transistor layer using ACF adhesive.

6. The frameless LCD panel according to claim 1, characterized in that, One end of the COF is connected to the portion of the transition layer that extends out of the thin-film transistor layer.

7. A display device comprising a frameless liquid crystal panel as described in any one of claims 1-6.

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