The present disclosure relates to the field of display technology, and more particularly to a liquid crystal display substrate and a display device.
Generally, a liquid crystal display (LCD) has a display region and a soldering region. A plurality of pixel units are disposed in the display region. Driving circuits, such as a driving integrated circuit (IC) and a flexible printed circuit (FPC) board, are disposed in the soldering region. The driving circuit is electrically connected with the plurality of pixel units for driving the pixel units to display images. The plurality of pixel units and the driving circuit are manufactured on a glass substrate.
The present disclosure provides a liquid crystal display substrate and a display device. The technical solutions are as follows:
In an aspect, a liquid crystal display substrate is provided. The liquid crystal display substrate comprises: a plurality of pixel units, a driving circuit, a conductive layer and a flexible substrate, wherein the pixel units are connected with the driving circuit by means of the conductive layer, and the driving circuit is configured to drive the plurality of pixel units to display images; and
the flexible substrate is in a bent state, the conductive layer is located outside a bending position of the flexible substrate, and the driving circuit and the plurality of pixel units are respectively located on two opposite sides of the flexible substrate in the bent state.
Optionally, the conductive layer in a bending region has at least one through hole, a bottom of the through hole is in contact with the flexible substrate, and both the flexible substrate and the conductive layer are bent in the bending region.
Optionally, an extending direction of the through hole is perpendicular to a surface, which is in contact with a bottom of the through hole, of the flexible substrate.
Optionally, a cross section of the through hole is of a circle shape, a diamond shape, or a strip shape, and a direction of the cross section crosses the extending direction of the through hole.
Optionally, the liquid crystal display substrate further comprises: a first buffer layer, wherein the first buffer layer is located on a target surface of a side, which is away from the conductive layer, of the flexible substrate, and covers a portion, which is located in the bending region, of the target surface, and the flexible substrate is bent in the bending region.
Optionally, a cross section of a contact surface of the first buffer layer and the flexible substrate in the bending region in a direction perpendicular to the contact surface is of an arc shape.
Optionally, the liquid crystal display substrate further comprises: a supporting structure, wherein the supporting structure is located on the target surface, and an orthographic projection of the supporting structure on the flexible substrate in a first direction covers an orthographic projection of the plurality of pixel units on the flexible substrate in the first direction; and
the first buffer layer covers a surface, which faces the bending region, of the supporting structure.
Optionally, the supporting structure comprises a first base substrate.
Optionally, the first buffer layer is made of metal, foam, resin or acrylic.
Optionally, the liquid crystal display substrate further comprises: a second buffer layer located on a side, which is away from the flexible substrate, of the conductive layer, wherein an orthographic projection of the second buffer layer on the flexible substrate covers an orthographic projection of the conductive layer on the flexible substrate.
Optionally, ductility of a material of the second buffer layer is better than that of a material of the conductive layer.
Optionally, the second buffer layer is made of ultraviolet curing adhesive, acrylic or epoxy resin.
Optionally, the liquid crystal display substrate further comprises: a third buffer layer, wherein the third buffer layer is located inside the bending position of the flexible substrate in the bent state, the third buffer layer is configured to fix a relative position between the flexible substrate in a soldering region and the flexible substrate in a display region; and
the driving circuit is formed on a surface of the flexible substrate in the soldering region, and the plurality of pixel units are formed on a surface of the flexible substrate in the display region.
Optionally, the liquid crystal display substrate further comprises: a supporting structure, wherein a first side of the supporting structure is fixedly connected with a target surface of the flexible substrate in the display region, a second side of the supporting structure is fixedly connected with a first side of the third buffer layer, and a second side of the third buffer layer is fixedly connected with a target surface of;
wherein an orthographic projection of the supporting structure on the flexible substrate along a first direction covers an orthographic projection of the plurality of pixel units on the flexible substrate along the first direction, the second side of the supporting structure is opposite to the first side of the supporting structure, the second side of the third buffer layer is opposite to the first side of the third buffer layer, and the target surface is a surface on a side, which is away from the conductive layer, of the flexible substrate.
Optionally, the liquid crystal display substrate further comprises a first buffer layer, wherein the third buffer layer and the first buffer layer are of an integral structure;
wherein the first buffer layer is located on a target surface of a side, away from the conductive layer, of the flexible substrate and covers a portion of the target surface in a bending region, and the flexible substrate is bent in the bending region.
Optionally, the third buffer layer is made of foam.
Optionally, the liquid crystal display substrate further comprises: a second base substrate, wherein an orthographic projection of the second base substrate on the flexible substrate along a second direction covers an orthographic projection of the driving circuit on the flexible substrate along the second direction.
In another aspect, a liquid crystal display device is provided. The liquid crystal display device comprises a liquid crystal display substrate, wherein the liquid crystal display substrate comprises: a plurality of pixel units, a driving circuit, a conductive layer and a flexible substrate, wherein the pixel units are connected with the driving circuit by means of the conductive layer, and the driving circuit is configured to drive the plurality of pixel units to display images; and
the flexible substrate is in a bent state, the conductive layer is outside a bending position of the flexible substrate, and the driving circuit and the plurality of pixel units are respectively located on two opposite sides of the flexible substrate in the bent state.
Optionally, a plurality of pixel units of the liquid crystal display substrate comprises liquid crystal cells; and the liquid crystal display device further comprises a middle frame and a backlight source, wherein the backlight source and the middle frame are in a gap formed by the flexible substrate in a soldering region and the flexible substrate in a display region, and the middle frame is on a side, away from the plurality of pixel units, of the backlight source, and the liquid crystal cells and the backlight source are fixedly connected with the middle frame; the driving circuit is formed on a surface of the flexible substrate in the soldering region, and the plurality of pixel units is formed on a surface of the flexible substrate in the display region.
Optionally, the liquid crystal display substrate further comprises: a first buffer layer, wherein the first buffer layer is on a target surface of a side, which is away from the conductive layer, of the flexible substrate and covers a portion of the target surface in a bending region, the flexible substrate is bent in the bending region; and the middle frame and a first buffer layer in the liquid crystal display substrate are of an integral structure.
In order to describe the technical solutions in the embodiments of the present disclosure more clearly, the following briefly introduces the accompanying drawings required for describing the embodiments. Apparently, the accompanying drawings in the following description show merely some embodiments of the present disclosure, and a person of ordinary skill in the art may also derive other drawings from these accompanying drawings without creative efforts.
Embodiments of the present disclosure will be described in further detail with reference to the accompanying drawings, to present the principles and advantages of the present disclosure more clearly.
As known to the inventors, pixel units, a driving circuit and the like are all formed on a glass substrate. Moreover, in order to reduce the border of a LCD, structures, such as a soldering pad, are usually manufactured on a side of the glass substrate in a printing manner, and then electronic components are soldered on the soldering pad, to a soldering region including the driving circuit.
However, as the usable area on the side of the glass substrate is small, it is difficult to manufacture the driving circuit on the glass substrate, resulting in a low yield rate of manufacturing the driving circuit on the side of the glass substrate.
An embodiment of the present disclosure provides a liquid crystal display substrate. With reference to
Moreover, with reference again to
In the two opposite sides of the flexible substrate 004 in the bent state, the side in which the plurality of pixel units 001 are located may be referred to as a display side of the liquid crystal display substrate, and the side in which the driving circuit 002 is located may be referred to as a non-display side of the liquid crystal display substrate.
In summary, the flexible substrate in the liquid crystal display substrate provided in the embodiments of the present disclosure is in the bent state, such that the driving circuit and the plurality of pixel units are respectively located on two opposite sides of the flexible substrate in the bent state. Thus, the area occupied by the non-display region in which the driving circuit is located on the display side of the liquid crystal display substrate can be reduced, which helps implementation of a narrow border. Compared with the related art, the driving circuit does not need to be manufactured on the side of the glass substrate, such that the driving circuit can be manufactured in a greater area, which reduces the difficulty of manufacturing the driving circuit, and increases the yield rate of the driving circuit.
The flexible substrate 004 may be made of a bending-resistant material such as polyimide, polyamide, polyethylene terephthalate (PET), polyethylene naphthalate, polyvinyl alcohol (PVA), polyetheretherketone or polycarbonate.
Optionally, the liquid crystal display substrate may further include a supporting structure. The supporting structure is on the target surface of the side, away from the conductive layer 003, of the flexible substrate 004, and an orthographic projection of the supporting structure on the flexible substrate 004 in a first direction may cover an orthographic projection of the plurality of pixel units 001 on the flexible substrate 004 in the first direction, such that the supporting structure provides a supporting force to the plurality of pixel units 001 and the flexible substrate 004 in the display region A. In addition, the supporting structure can increase the distance between the flexible substrate in the display region and the flexible substrate in the soldering region, such that the flexible substrate in the soldering region can be bent in a small arc, which can reduce the probability of breakage of the flexible substrate caused by being. Here, the first direction may be perpendicular to a surface, in the display region A, of the flexible substrate 004.
In an implementation, as illustrated in
For example, with reference again to
It should be noted that the supporting structure may also have other implementations. For example, the supporting structure may be a film layer with a hardness value greater than a reference hardness value.
Moreover, each pixel unit 001 may include a thin film transistor (TFT), a pixel electrode, a liquid crystal cell, a common electrode, a color film layer and the like. The liquid crystal cell may be internally provided with an alignment layer, a spacer, a liquid crystal layer, sealant and the like. As shown in
Optionally,
Optionally, the second base substrate 006 may be a transparent substrate, which may be a substrate made of a material with a certain hardness, such as glass, quartz, transparent resin, or metal (for example, stainless steel). Alternatively, the second base substrate 006 may be made of a bending-resistant material, such as polyimide, polyamide, PET, polyethylene naphthalate, PVA, polyetheretherketone or polycarbonate.
It should be noted that both the first base substrate 005 and the second base substrate 006 may be a part of the base substrate used in manufacturing the liquid crystal display substrate. In the manufacturing process, the flexible substrate 004, the pixel units 001, the driving circuit 002, and the like may be sequentially formed on the base substrate, and the base substrate in the bending region B is removed through laser stripping after the manufacture, to obtain the first base substrate 005 and the second base substrate 006. Alternatively, the base substrate in the bending region B and in the soldering region C is removed, to obtain the first base substrate 005. Alternatively, the base substrate in the bending region B and in the display region A is removed, to obtain the second base substrate 006.
Optionally, the liquid crystal display substrate may further include a first buffer layer. The first buffer layer is located on a target surface of a side, which is away from the conductive layer 003, of the flexible substrate 004, and covers a portion, which is located in the bending region, of the target surface. The first buffer layer is configured to provide a buffering force to the flexible substrate 004 located in the bending region B, so that the conductive layer 003 located in the bending region B is prevented from being broken due to an excessive bending angle, and thus the yield rate of the liquid crystal display substrate is increased.
In an implementable manner of the first buffer layer, when the liquid crystal display substrate includes a supporting structure, the first buffer layer may cover a portion of the target surface, which is located in the bending region B, of the flexible substrate 004, and may further cover a surface, which faces the bending region B, of the supporting structure. For example, with reference to
In another implementable manner of the first buffer layer, when the liquid crystal display substrate does not include a supporting structure, the first buffer layer may cover a portion of the target surface, which is located in a bending region B, of the flexible substrate 004, and may further cover a portion of the target surface, which is located in the display region A, of the flexible substrate 004, to provide a buffering force simultaneously to the flexible substrate 004 in the display region A and the flexible substrate 004 in the bending region B.
Further, with reference again to
Here, in order to ensure that the first buffer layer 007 can provide a good buffering effect to the flexible substrate 004 and the conductive layer 003, the first buffer layer 007 may be made of a material such as metal, foam, resin (for example, epoxy resin) or acrylic.
Further, with reference to
Moreover, in order to ensure that the second buffer layer 008 can provide sufficient buffering force to the conductive layer 003, the ductility of the material of the second buffer layer 008 may be better than that of the material of the conductive layer 003. For example, the second buffer layer 008 may be made of glue which blocks water and oxygen, such as ultraviolet curing adhesive, acrylic or epoxy resin. Meanwhile, by adjusting the thickness of the second buffer layer 008, the conductive layer 003 may be enabled to be located in a stress neutral layer in the bending region B, so that the bending force subjected by the conductive layer 003 is further reduced, and the conductive layer 003 is prevented from being broken during bending. Here, the stress subjected by the stress neutral layer is approximately equal to zero.
Optionally, with reference again to
In another possible implementation, when the liquid crystal display substrate further includes a supporting structure, a first side of the supporting structure may be fixedly connected with a target surface of the flexible substrate 004 in the display region, a second side of the supporting structure may be fixedly connected with a first side of the third buffer layer 009, and a second side of the third buffer layer 009 may be fixedly connected with a target surface of the flexible substrate 004 in the soldering region. Here, the second side of the supporting structure is to the first side of the supporting structure, and the second side of the third buffer layer is opposite to the first side of the third buffer layer.
Optionally, the fixe connection may be implemented as being pasted and the like. In addition,
In addition, when the first buffer layer 007 and the third buffer layer 009 are made of the same material, for example, when the first buffer layer 007 and the third buffer layer 009 are both made of foam, the first buffer layer 007 and the third buffer layer 009 may be of an integral structure, so that the manufacturing process of the liquid crystal display substrate is simplified.
Optionally, with reference to
Here, the cross section of the through hole 0031 may be of a circle shape (as shown in
Optionally, with reference to
Moreover, please refer to
In summary, in the embodiments of the present disclosure, the flexible substrate in the liquid crystal display substrate is in the bent state, such that the driving circuit and the plurality of pixel units are respectively located on two opposite sides of the flexible substrate in the bent state, which can reduce the area occupied by a non-display region in which the driving circuit is located on the display side of the liquid crystal display substrate, and help implementation of a narrow border. In addition, compared with the related art, the driving circuit does not need to be manufactured on the side of the glass substrate, such that driving circuit can be manufactured in a large area, which reduces the difficulty of manufacturing the driving circuit, and increases the yield rate of the driving circuit. Therefore, the present disclosure can facilitate the production of a full-screen LCD and the implementation of an ultra-narrow border splicing screen.
An embodiment of the present disclosure further provides a liquid crystal display device including the liquid crystal display substrate provided in the above embodiments.
Optionally, with reference to
Further, with reference again to
Moreover, when the middle frame 104 and the first buffer layer 007 are made of the same material, the middle frame 104 and the first buffer layer 007 may be of an integral structure. On the one hand, the stability of the first buffer layer 007 can be ensured, and on the other hand, the first buffer layer 007 and the middle frame 104 can be formed in one patterning process, so that the manufacturing process of the liquid crystal display device is simplified.
Optionally, the liquid crystal display device further includes a housing (not shown in
The liquid crystal display device may be any product or component with a display function, such as a liquid crystal panel, a piece of electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, and a navigator.
In summary, in the embodiments of the present disclosure, the flexible substrate in the liquid crystal display substrate is in a bent state, such that the driving circuit and the plurality of pixel units are respectively located on two opposite sides of the flexible substrate in the bent state, which can reduce the area occupied by a non-display region in which the driving circuit is located on the display side of the liquid crystal display substrate, and help implementation of a narrow border. In addition, compared with the related art, the driving circuit does not need to be manufactured on the side of the glass substrate, such that driving circuit can be manufactured in a large area, which reduces the difficulty of manufacturing the driving circuit, and increases the yield rate of the driving circuit. Therefore, the present disclosure can facilitate the production of a full-screen LCD and the implementation of an ultra-narrow border splicing screen.
The foregoing descriptions are merely exemplary embodiments of the present disclosure, and are not intended to limit the present disclosure. Within the spirit and principles of the disclosure, any modifications, equivalent substitutions, improvements, etc., are within the protection scope of the present disclosure.
Number | Date | Country | Kind |
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201810489237.9 | May 2018 | CN | national |
This application is a 371 of PCT Application No. PCT/CN2019/087325, filed May 17, 2019, which claims priority to Chinese Patent Application No. 201810489237.9, filed May 21, 2018 and entitled “LIQUID CRYSTAL DISPLAY SUBSTRATE AND DISPLAY DEVICE”, the entire contents of which are incorporated herein by reference.
Filing Document | Filing Date | Country | Kind |
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PCT/CN2019/087325 | 5/17/2019 | WO | 00 |