阅读说明：本技术 一种柔性显示母板、柔性显示面板及其应用 (Flexible display mother board, flexible display panel and application thereof ) 是由 邹美玲 于 2018-08-30 设计创作，主要内容包括：本发明提供一种柔性显示母板、柔性显示面板及其应用,所述柔性显示母板从下至上依次包括衬底、非显示区和显示区,所述非显示区包括位于衬底之上的柔性聚合物层,在显示区的正下方的柔性聚合物层与衬底之间设置机械解离层,并且在显示区的正下方设置紫外吸收层。本发明的柔性显示母板不仅能够保证在其制备过程中柔性基底与衬底之间具有高附着力又能够满足在衬底与柔性基底分离时易于分离的要求,并且可以防止透明柔性衬底吸收紫外光而发黄,由其得到的柔性显示面板具有更加广阔的应用前景。(The invention provides a flexible display mother board, a flexible display panel and application thereof, wherein the flexible display mother board sequentially comprises a substrate, a non-display area and a display area from bottom to top, the non-display area comprises a flexible polymer layer positioned on the substrate, a mechanical dissociation layer is arranged between the flexible polymer layer right below the display area and the substrate, and an ultraviolet absorption layer is arranged right below the display area. The flexible display mother board disclosed by the invention can ensure that the flexible substrate and the substrate have high adhesive force in the preparation process, can meet the requirement of easy separation when the substrate is separated from the flexible substrate, can prevent the transparent flexible substrate from absorbing ultraviolet light to cause yellowing, and the flexible display panel obtained by the flexible display mother board has wider application prospect.)

1. The utility model provides a flexible display mother board, its characterized in that, flexible display mother board includes substrate, non-display area and display area from supreme down in proper order, non-display area is including being located the flexible polymer layer on the substrate, sets up the mechanical dissociation layer between the flexible polymer layer and the substrate under the display area to set up the ultraviolet absorbing layer under the display area.

2. The flexible display mother board of claim 1, wherein the display area comprises pixel circuits and pixel regions of devices;

preferably, one of the flexible display mother boards includes at least two display regions thereon over a non-display region.

3. The flexible display mother board according to claim 1 or 2, wherein the display area is rectangular, square, circular or other profiled structure.

4. The flexible display mother sheet according to any one of claims 1 to 3, wherein the mechanical release layer and the ultraviolet absorption layer have the same shape as the display area;

preferably, the mechanical dissociation layer and the ultraviolet absorption layer have the same plane size as the display region.

5. The flexible display mother sheet of any of claims 1-4, wherein the mechanical release layer and the ultraviolet absorbing layer are located over a substrate, the ultraviolet absorbing layer is in contact with the substrate, the mechanical release layer is located on the ultraviolet absorbing layer, and the mechanical release layer and the ultraviolet absorbing layer are covered by a flexible polymer layer;

preferably, the ultraviolet absorbing layer is attached below the mechanical dissociation layer, the ultraviolet absorbing layer and the mechanical dissociation layer are recessed in the substrate layer, and the upper surface of the mechanical dissociation layer is attached with the flexible polymer layer.

6. The flexible display mother panel according to any one of claims 1 to 5, wherein the mechanical dissociation layer is recessed in the substrate layer, an upper surface of the mechanical dissociation layer is attached to the flexible polymer layer, and the ultraviolet absorption layer is located on a lower surface of the substrate at a position corresponding to the mechanical dissociation layer;

preferably, the mechanical dissociation layer is positioned above the substrate and covered by a flexible polymer layer, and the ultraviolet absorption layer is positioned on the lower surface of the substrate at a position corresponding to the mechanical dissociation layer.

7. The flexible display mother panel according to any one of claims 1 to 6, wherein the material of the flexible polymer layer is polyimide, polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polyethersulfone, polyacrylate, polyetherimide, polyamide, or polyetheretherketone;

preferably, the mechanical dissociation layer is a carbon simple substance thin film layer or a nitride thin film layer;

preferably, the ultraviolet absorption layer is an amorphous silicon layer, a titanium dioxide layer or a zinc oxide layer;

preferably, the thickness of the mechanical release layer is 1 to 100 micrometers;

preferably, the thickness of the ultraviolet absorption layer is 1-100 micrometers;

preferably, the substrate is a glass substrate.

8. A flexible display panel obtained by peeling off the substrate from the flexible display mother substrate according to any one of claims 1 to 7.

9. The flexible display panel of claim 8, wherein the lift-off removal substrate is achieved by means of laser lift-off;

preferably, the laser lift-off uses ultraviolet light at a wavelength of 308 nm.

10. An OLED display device, characterized in that it comprises a flexible display panel according to claim 8 or 9.

Technical Field

The invention belongs to the technical field of flexible display devices, and relates to a flexible display mother board, a flexible display panel and application thereof.

Background

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a flexible display mother board, a flexible display panel and application thereof.

In order to achieve the purpose, the invention adopts the following technical scheme:

in one aspect, the present invention provides a flexible display mother board, which sequentially includes a substrate, a non-display region and a display region from bottom to top, wherein the non-display region includes a flexible polymer layer located above the substrate, a mechanical dissociation layer is disposed between the flexible polymer layer and the substrate directly below the display region, and an ultraviolet absorption layer (UV absorption layer) is disposed directly below the display region.

In the invention, the mechanical dissociation layer and the ultraviolet absorption layer are arranged right below the display area, so that the UV absorption layer prevents the transparent flexible substrate from absorbing UV to yellow, and the weaker bonding force between the mechanical dissociation layer and the flexible polymer layer replaces the chemically strong bonding between the flexible polymer layer and the substrate, thereby being more beneficial to the full separation of the flexible polymer layer and the substrate.

Preferably, one of the flexible display mother boards includes at least two display regions located above a non-display region. The purpose of making multiple display areas on one flexible display mother board is to produce multiple flexible display panels at one time, wherein each display area is taken as a standard, and the whole flexible display panel can be cut into individual flexible display panel applications in a subsequent preparation process.

In the present invention, the shape of the display area is not limited, and preferably, the shape of the display area may be rectangular, square, circular, and other irregular structures.

In the present invention, the mechanical dissociation layer and the ultraviolet absorption layer are located right under the display region. That is, the mechanical dissociation layer and the ultraviolet absorption layer are arranged right below the display area corresponding to the relative positions of the display area.

Preferably, the mechanical dissociation layer and the ultraviolet absorption layer have the same shape as the display region.

Preferably, the mechanical dissociation layer and the ultraviolet absorption layer have the same plane size as the display region. The same plane size refers to a size of a two-dimensional plane, for example, when the display region is rectangular in shape, the mechanical dissociation layer and the ultraviolet absorption layer have the same length and width as the display region, and when the display region is square in shape, the mechanical dissociation layer and the ultraviolet absorption layer have the same side length as the display region.

In one embodiment, the mechanical release layer and the uv absorbing layer are located above the substrate, the uv absorbing layer is in contact with the substrate, the mechanical release layer is located on the uv absorbing layer, and the mechanical release layer and the uv absorbing layer are covered by a flexible polymer layer.

In another embodiment, the uv absorbing layer is attached below the mechanical release layer, the uv absorbing layer and the mechanical release layer are recessed within the substrate layer, and the upper surface of the mechanical release layer is attached to the flexible polymer layer.

In another embodiment, the mechanical dissociation layer is recessed in the substrate layer, the upper surface of the mechanical dissociation layer is attached to the flexible polymer layer, and the ultraviolet absorption layer is located on the lower surface of the substrate at a position corresponding to the mechanical dissociation layer.

In another embodiment, the mechanical dissociation layer is covered by a flexible polymer layer above the substrate, and the ultraviolet absorption layer is located on the lower surface of the substrate at a position corresponding to the mechanical dissociation layer.

In the present invention, the material of the flexible polymer layer is polyimide, polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polyethersulfone, polyacrylate, polyetherimide, polyamide or polyetheretherketone.

In the invention, aiming at the transparent display device, the polymer layer is made of transparent polymer, the transparent polymer is easy to yellow after being irradiated by UV light, and thus, the effect of the UV absorption layer is set, so that the AA area is separated from the glass substrate through the mechanical dissociation layer, and the influence on display caused by the yellowing of the transparent polymer substrate is avoided because the UV light is blocked.

Preferably, the mechanical dissociation layer is a carbon simple substance thin film layer or a nitride thin film layer.

Preferably, the ultraviolet absorption layer is an amorphous silicon layer (a-Si), a titanium dioxide layer (TiO)₂) Or a zinc oxide layer (ZnO).

Preferably, the thickness of the mechanical release layer is 1-100 microns, such as 1 micron, 5 microns, 10 microns, 15 microns, 20 microns, 25 microns, 30 microns, 40 microns, 50 microns, 60 microns, 70 microns, 80 microns, 90 microns or 100 microns.

Preferably, the uv absorbing layer has a thickness of 1-100 microns, such as 1 micron, 5 microns, 10 microns, 15 microns, 20 microns, 25 microns, 30 microns, 40 microns, 50 microns, 60 microns, 70 microns, 80 microns, 90 microns or 100 microns.

Preferably, the substrate is a glass substrate.

In the present invention, the flexible display mother substrate may be fabricated by using a known fabrication method to fabricate a flexible polymer layer and a mechanical dissociation layer and a uv absorption layer on a substrate, and to fabricate a display region, wherein the fabrication of the mechanical dissociation layer and the uv absorption layer may be performed by using a chemical vapor deposition method (CVD), a physical vapor deposition method (PVD), an atomic layer deposition method (ALD), etc., which are known in the art.

In the invention, the mechanical dissociation layer is arranged between the flexible polymer layer and the substrate under the display area, but not between the whole flexible polymer layer and the substrate, namely, the area of the flexible polymer layer which is not covered by the display area is still combined with the substrate, so that the strong combination force can be ensured between the flexible polymer and the substrate in the process of preparing the flexible display mother board, the phenomenon that the substrate falls off or slides in the preparation process when the mechanical dissociation layer is completely arranged is avoided, and meanwhile, the flexible polymer layer under the display area can be smoothly separated from the substrate in the stripping process.

In another aspect, the present invention provides a flexible display panel obtained by peeling off a substrate from a flexible display mother substrate as described above.

Preferably, the peeling off of the substrate is achieved by means of laser peeling.

In the invention, the substrate and the flexible polymer layer in the flexible display mother board are peeled off by using a laser peeling mode, and the substrate is removed to obtain the flexible display panel.

In the invention, the mechanical dissociation layer is arranged under the display area, and weak bonding force exists between the mechanical dissociation layer and the flexible polymer layer to replace strong chemical bonding force between the flexible polymer layer and the substrate before, so that the flexible polymer and the substrate are easily and fully separated during laser stripping, the problem of insufficient separation caused by blocking UV light transmission due to the existence of impurities or dirt in the AA area is avoided, and the problem of damage to the flexible polymer layer due to the generation of local tearing between the flexible polymer and the substrate is avoided.

Preferably, the laser lift-off uses ultraviolet light at a wavelength of 308 nm.

In another aspect, the present invention provides an OLED display device including the flexible display panel as described above.

Compared with the prior art, the invention has the following beneficial effects:

in the flexible display mother board, the mechanical dissociation layer and the ultraviolet absorption layer are arranged under the display area, so that the UV absorption layer prevents the transparent flexible substrate from absorbing UV to yellow, the weak bonding force between the mechanical dissociation layer and the flexible polymer layer replaces the chemical strong bonding between the flexible polymer layer and the substrate, the flexible polymer layer and the substrate are more favorably and fully separated, the problem of insufficient separation caused by blocking UV light transmission due to the existence of impurities or dirt in the display area is solved, the problem of damage to the flexible polymer layer due to the generation of local tearing between the flexible polymer and the substrate is avoided, and the flexible display panel obtained by the flexible display panel has wider application prospect.

Drawings

Fig. 1 is a schematic structural diagram of a flexible display mother board according to the present invention, in which 1 is a glass substrate, 2 is a display region, and 3 is a non-display region;

fig. 2 is a schematic view of the arrangement of the mechanical dissociation layer and the ultraviolet absorption layer on the flexible display mother board in example 1 of the present invention, in which 1 is a glass substrate, 3 is a flexible polymer layer, 4 is a mechanical dissociation layer, and 5 is an ultraviolet absorption layer;

fig. 3 is a schematic diagram of the arrangement of the mechanical dissociation layer and the ultraviolet absorption layer on the flexible display mother board in example 2 of the present invention, in which 1 is a glass substrate, 3 is a flexible polymer layer, 4 is a mechanical dissociation layer, and 5 is an ultraviolet absorption layer;

fig. 4 is a schematic diagram of the arrangement of the mechanical dissociation layer and the ultraviolet absorption layer on the flexible display mother board in example 3 of the present invention, in which 1 is a glass substrate, 3 is a flexible polymer layer, 4 is a mechanical dissociation layer, and 5 is an ultraviolet absorption layer;

fig. 5 is a schematic diagram of the arrangement of the mechanical dissociation layer and the ultraviolet absorption layer on the flexible display mother board in example 4 and example 5 of the present invention, wherein 1 is a glass substrate, 3 is a flexible polymer layer, 4 is a mechanical dissociation layer, and 5 is an ultraviolet absorption layer.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.