Film layer structure of liquid crystal display screen

Abstract

The utility model discloses a liquid crystal display screen film layer structure which comprises a first conducting layer, a second conducting layer, a third conducting layer, a first insulating layer and a second insulating layer. The first insulating layer is arranged between the first conductive layer and the second conductive layer; the second insulating layer is arranged between the second conductive layer and the third conductive layer; the first conducting layer and the third conducting layer are in through hole connection through the first connecting through hole; the through hole connection is that a first conducting layer pattern is reserved in the first connecting through hole, and the first conducting layer pattern is in lap joint with the third conducting layer. The first conductive layer pattern is reserved in the first connecting through hole of the PLN or OC protective layer, so that the first conductive layer pattern is in lap joint with the third conductive layer, etching is not needed in the first connecting through hole, the residue problem is avoided, the diameter of the first connecting through hole is far smaller than the thickness of the first insulating layer, and the manufacturing cost is reduced. And the transmittance of the display screen and the flatness of the glass are further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of display screen testing, in particular to a film layer structure of a liquid crystal display screen. Background Art

[0002] Among many liquid crystal displays, thin film transistor liquid crystal display (TFT LCD for short) has superior characteristics such as high space utilization efficiency, low power consumption, no radiation and low electromagnetic interference. Thin film transistor liquid crystal display has been widely used in various aspects of life. Usually, a liquid crystal display includes a housing, a liquid crystal display panel arranged in the housing, and a backlight module (Backlight module) arranged in the housing. Among them, the liquid crystal display panel generally includes a thin film transistor array substrate (TFTArray Substrate), a color filter substrate (Color Filter, CF), and a liquid crystal layer (Liquid Crystal Layer) configured between the two substrates. Its working principle is to control the rotation of the liquid crystal molecules of the liquid crystal layer by applying a driving voltage on the two glass substrates, and refract the light of the backlight module to produce a picture.

[0003] In the array process of automotive LCD or LTPS products, in order to reduce loading and increase flatness, an organic PLN / OC layer needs to be added as a protective layer, and the conductive layer needs to be connected through the PLN / OC hole; however, the PLN / OC hole has a large depth, which can easily cause incomplete etching. The conventional approach is to enlarge the diameter of the PLN / OC hole, but this will result in lower product transmittance. If the hole diameter is made smaller, it will directly lead to residue. Utility Model Content

[0004] The existing array process for automotive LCD or LTPS products cannot take into account both transmittance and residue avoidance, and there is a problem of poor via contact.

[0005] In view of the above problems, a film layer structure of a liquid crystal display is proposed, in which a first conductive layer pattern is reserved in the first connecting through hole of the PLN or OC protective layer, so that the first conductive layer pattern is overlapped with the third conductive layer. No etching is required in the first connecting through hole, thereby avoiding the residue problem. In addition, the diameter of the first connecting through hole is much smaller than the thickness of the first insulating layer, thereby further improving the transmittance of the display and the flatness of the glass.

[0006] A liquid crystal display screen film layer structure, comprising:

[0007] a first conductive layer;

[0008] a second conductive layer;

[0009] a third conductive layer;

[0010] a first insulating layer;

[0011] a second insulating layer;

[0012] The first insulating layer is disposed between the first conductive layer and the second conductive layer;

[0013] The second insulating layer is disposed between the second conductive layer and the third conductive layer;

[0014] The first conductive layer and the third conductive layer are connected by a first connecting through hole;

[0015] The through-hole connections are:

[0016] A first conductive layer pattern is reserved in the first connecting through hole so that the first conductive layer pattern overlaps the third conductive layer.

[0017] In combination with the film layer structure of the liquid crystal display screen described in the utility model, in a first possible implementation manner, the first conductive layer and the second conductive layer are insulated from each other via insulating through holes.

[0018] In combination with the first possible implementation manner of the utility model, in a second possible implementation manner, the insulating through hole includes:

[0019] a first insulating through hole;

[0020] The first insulating through hole is located at one side of the first connecting through hole, and penetrates the first insulating layer and the second insulating layer to insulate the first conductive layer from the second conductive layer.

[0021] In combination with the second possible implementation manner of the utility model, in a third possible implementation manner, the insulating through hole further includes:

[0022] a second insulating through hole;

[0023] The second insulating through hole is located at the other side of the first connecting through hole, and penetrates the first insulating layer and the second insulating layer to insulate the first conductive layer from the second conductive layer.

[0024] In combination with the third possible implementation of the utility model, in a fourth possible implementation, the liquid crystal display screen film layer structure further includes:

[0025] First via;

[0026] The third conductive layer is connected to the first connecting through hole by etching.

[0027] In combination with the fourth possible implementation manner of the utility model, in a fifth possible implementation manner, the first conductive layer pattern covers the first connecting through hole along the first via hole, and overlaps with the third conductive layer through the first via hole.

[0028] In combination with the fifth possible implementation manner of the present utility model, in a sixth possible implementation manner, the diameter of the first connecting through hole is much smaller than the thickness of the first insulating layer.

[0029] In combination with the sixth possible implementation manner of the utility model, in a seventh possible implementation manner, the first insulating layer is made of PLN material or OC material.

[0030] By implementing the liquid crystal display film layer structure described in the utility model, a first conductive layer pattern is reserved in the first connecting through hole of the PLN or OC protective layer, so that the first conductive layer pattern is overlapped with the third conductive layer, and no etching is required in the first connecting through hole, thereby avoiding the residue problem, and the diameter of the first connecting through hole is much smaller than the thickness of the first insulating layer, thereby further improving the transmittance of the display screen and the flatness of the glass. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, 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 invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 It is a first schematic diagram of the existing film structure of a liquid crystal display screen;

[0033] Figure 2 A second schematic diagram of the existing liquid crystal display film structure;

[0034] Figure 3 This is the first schematic diagram of the film structure of the liquid crystal display screen in the utility model;

[0035] Figure 4 This is the second schematic diagram of the film structure of the liquid crystal display screen in the present invention. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solution in the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the utility model.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0038] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0039] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0041] The existing array process of automotive LCD or LTPS products cannot take into account both transmittance and residue avoidance, and there are problems such as poor contact of vias. Figure 1 and Figure 2 , Figure 1 This is a first schematic diagram of the existing liquid crystal display film structure. Figure 2 This is a second schematic diagram of the existing liquid crystal display film structure.

[0042] After the first insulating layer 400 (PLN layer) is dug, the first conductive layer 100 is formed on the entire surface. However, there is no first conductive layer 100 pattern in the PLN hole in the first insulating layer 400 and all of it needs to be etched. However, the PLN hole is too deep, which may easily cause the first conductive layer 100 to remain in the hole. When etching the first via 700, the conductive layer cannot be etched, resulting in poor contact.

[0043] In view of the above problems, a liquid crystal display film layer structure is proposed. A liquid crystal display film layer structure, such as Figure 3and Figure 4 , Figure 3 This is the first schematic diagram of the film structure of the liquid crystal display screen in the utility model. Figure 4 This is a second schematic diagram of the film layer structure of the liquid crystal display screen in the utility model, including a first conductive layer 100, a second conductive layer 200, a third conductive layer 300, a first insulating layer 400, and a second insulating layer 500; the first insulating layer 400 is arranged between the first conductive layer 100 and the second conductive layer 200; the second insulating layer 500 is arranged between the second conductive layer 200 and the third conductive layer 300; the first conductive layer 100 and the third conductive layer 300 are connected by a first connecting through hole 410; the through hole connection is: a first conductive layer pattern 110 is reserved in the first connecting through hole 410, so that the first conductive layer pattern 110 is overlapped with the third conductive layer 300.

[0044] In this embodiment, the first conductive layer pattern 110 is reserved in the first connecting through hole 410 of the PLN or OC protective layer so that the first conductive layer pattern 110 overlaps with the third conductive layer 300. No etching is required in the first connecting through hole 410, thus avoiding the residue problem.

[0045] In this embodiment, the second conductive layer 200 and the third conductive layer 300 are insulated from each other by the first insulating via 610 and the second insulating via 620 and do not need to be connected. Instead, only the first conductive layer 100 and the third conductive layer 300 need to be connected.

[0046] Furthermore, the insulating through hole includes a first insulating through hole 610 ; the first insulating through hole 610 is located at one side of the first connecting through hole, penetrates the first insulating layer 400 and the second insulating layer 500 , and insulates the first conductive layer 100 from the second conductive layer 200 .

[0047] Furthermore, the insulating through hole also includes a second insulating through hole 620; the second insulating through hole 620 is located on the other side of the first connecting through hole 410, penetrates the first insulating layer 400 and the second insulating layer 500, and insulates the first conductive layer 100 from the second conductive layer 200. The first insulating through hole 610 and the second insulating through hole 620 are located on both sides of the first insulating through hole 600, so that the second conductive layer 200 is insulated from the first conductive layer 100 and the third insulating layer 300.

[0048] The first conductive layer pattern 110 is overlapped with the third conductive layer 300 through the first connecting via 410 to achieve electrical connection.

[0049] Furthermore, the LCD film structure further includes a first via hole 700, and the third conductive layer 300 is connected to the first connecting through hole 410 by etching. The first conductive layer pattern 110 is spread along the first via hole 700 and overlaps with the third conductive layer 300 through the first via hole 700.

[0050] The diameter of the first connection through hole 410 is much smaller than the thickness of the first insulating layer 400, which further improves the transmittance of the display screen and the flatness of the glass. The diameter of the first connection through hole 410 can be a relatively small ratio of one fifth, one sixth of the thickness of the first insulating layer 400, or other smaller ratios.

[0051] In this embodiment, although the diameter of the first connection through hole 410 is reduced, since etching is not required, it is sufficient to reserve the first conductive layer pattern 110 .

[0052] The film forming sequence in this embodiment may be: first conductive layer 100 - first insulating layer 400 - second conductive layer 200 - second insulating layer 500 - third conductive layer 300 .

[0053] Preferably, the first insulating layer 400 is made of PLN material or OC material.

[0054] In implementing the film layer structure of the liquid crystal display screen of the utility model, the first conductive layer pattern 110 is reserved in the first connecting through hole 410 of the PLN or OC protective layer, so that the first conductive layer pattern 110 is overlapped with the third conductive layer 300, and no etching is required in the first connecting through hole 410, thereby avoiding the residue problem, and the diameter of the first connecting through hole 410 is much smaller than the thickness of the first insulating layer 400, thereby further improving the transmittance of the display screen and the flatness of the glass.

[0055] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A liquid crystal display film structure, characterized in that: include: a first conductive layer; a second conductive layer; a third conductive layer; a first insulating layer; a second insulating layer; The first insulating layer is disposed between the first conductive layer and the second conductive layer; The second insulating layer is disposed between the second conductive layer and the third conductive layer; The first conductive layer and the third conductive layer are connected by a first connecting through hole; The through-hole connections are: A first conductive layer pattern is reserved in the first connecting through hole so that the first conductive layer pattern overlaps the third conductive layer.

2. The liquid crystal display film structure according to claim 1, characterized in that: The first conductive layer and the second conductive layer are insulated from each other by an insulating through-hole.

3. The liquid crystal display film structure according to claim 2, characterized in that: The insulating through hole comprises: a first insulating through hole; The first insulating through hole is located at one side of the first connecting through hole, and penetrates the first insulating layer and the second insulating layer to insulate the first conductive layer from the second conductive layer.

4. The liquid crystal display film structure according to claim 3, characterized in that: The insulating through hole further comprises: a second insulating through hole; The second insulating through hole is located at the other side of the first connecting through hole, and penetrates the first insulating layer and the second insulating layer to insulate the first conductive layer from the second conductive layer.

5. The liquid crystal display film structure according to claim 1, characterized in that: The liquid crystal display screen film layer structure also includes: First via; The third conductive layer is connected to the first connecting through hole by etching.

6. The liquid crystal display film structure according to claim 5, characterized in that: The first conductive layer pattern covers the first connecting through hole along the first via hole, and overlaps with the third conductive layer through the first via hole.

7. The liquid crystal display film structure according to claim 6, characterized in that: The diameter of the first connecting through hole is much smaller than the thickness of the first insulating layer.

8. The liquid crystal display film structure according to any one of claims 1 to 7, characterized in that: The first insulating layer is made of PLN material or OC material.

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