CN104347640B - Flexible display device - Google Patents

Abstract

The present invention discloses a flexible display device, which at least includes a flexible substrate, at least one composite material layer located on the flexible substrate, and an electronic component located on the composite material layer. The composite material layer includes an organic material layer (organic layer) and an inorganic material layer (inorganic layer) stacked, and at least one of the inorganic material layer and the organic material layer includes at least one antistatic material. The antistatic material of the embodiment is, for example, antistatic particles, antistatic agents, or antistatic layers (such as transparent conductive layers/transparent conductive oxide layers, or polymer conductive layers). The display device of the embodiment can make electronic components, such as flexible electronic components, achieve the flexibility and gas barrier properties required by the product, and can release electrostatic charges and release stress on the overall structure.

Description

flexible display device

technical field

The present invention relates to a display device, and in particular to a flexible display device.

Background technique

Electronic products with displays have become an indispensable necessity for modern people, whether in work, study, or personal leisure and entertainment, including smart phones (Smartphone), tablet computers (Pad), notebook computers (Notebook), Display (Monitor) to television (TV) and many other related products. Consumers are not only looking for better electronic features of electronic products, such as high-quality display effect, faster response speed during operation, long service life and high stability, but also expect richer and more diversified functions.

With the development of electronic products toward more humanization and diversification, the design of components becomes more sophisticated, and the demand for impedance of water vapor/oxygen also increases accordingly. If the amount of moisture/oxygen infiltrated into the electronic components exceeds the acceptable value of the components, the components will be oxidized and degraded, affecting the display quality and shortening the operating life of the electronic components. The indicators generally used to judge the ability of water vapor/oxygen barrier layer are water vapor transmission rate (Water Vapor Transmission Rate, WVTR, g/m ² /day), and oxygen transmission rate (Oxygen Transmission Rate, OTR, cm ³ /m ² /day)). Various displays have their acceptable moisture ingress values. For example, the substrate barrier layer of a liquid crystal display (LCD) must at least have an oxygen transmission rate (OTR) of about 0.1 cm ³ /m ² /day and a water vapor transmission rate (WVTR) of about 0.1 g/m ² /day. For organic light-emitting diode displays (OLEDs), the requirements for gas barrier rate are the most stringent, generally requiring a water vapor transmission rate (WVTR) of 1×10 ^-6 g/m ² /day, and 10 ^-5 to 10 Oxygen transmission rate (OTR) of ^-3 cm ³ /m ² /day.

In addition to the above-mentioned display quality and operating functions, consumers' expectations for electronic products also include whether they are thinner and lighter in appearance and easy to carry. Flexible and soft electronic products are in line with market demand. Flexible electronic products mainly arrange electronic components on a flexible substrate. At present, the materials of flexible substrates can be roughly divided into three categories: thin glass, metal film and plastic substrates. Among them, thin glass is used as a flexible substrate. Although it has an excellent water vapor/oxygen barrier effect, it has the disadvantage of being fragile during the manufacturing and transportation process. As a flexible substrate, the metal thin film has excellent moisture/oxygen barrier effect and is not easily broken, but its flexibility is poor. As a flexible substrate, the plastic substrate has excellent flexibility and is not easily broken, but the effect of blocking water vapor/oxygen is poor, and the insulation is not good during the manufacturing process or handling or carrier board release. High-quality plastic substrates are prone to static electricity after friction. If the static electricity is not eliminated, electronic materials are easily damaged. The existing solutions are: improving the manufacturing process environment to reduce or eliminate the generation of charges, or adding ESD protection (ESD protection) design in the circuit layout, or adding charge release paths in the plastic substrate, or after the components are manufactured Paste or plate an electrostatic protective film.

Contents of the invention

The purpose of the present invention is to provide a flexible display device, which uses a composite material layer on a flexible substrate (such as a plastic substrate) to solve the deficiencies in flexibility, electrostatic accumulation, and gas barrier properties of existing flexible electronic components. Insufficient, and stress residual problems.

To achieve the above purpose, according to the present invention, a display device is provided, which at least includes a flexible substrate, at least one composite material layer on the flexible substrate, and an electronic component on the composite material layer. The composite material layer includes an organic layer and an inorganic layer stacked, and at least one of the inorganic layer and the organic layer includes at least one antistatic material.

In order to have a better understanding of the above-mentioned and other aspects of the present invention, the following specific embodiments are described in detail as follows in conjunction with the accompanying drawings:

Description of drawings

FIG. 1 is a schematic cross-sectional view of a flexible display device according to the first embodiment of the present invention;

2 is a schematic cross-sectional view of a flexible display device according to a second embodiment of the present invention;

3 is a schematic cross-sectional view of a flexible display device according to a third embodiment of the present invention;

4 is a schematic cross-sectional view of a flexible display device according to a fourth embodiment of the present invention;

5 is a schematic cross-sectional view of a flexible display device according to a fifth embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of a flexible display device according to a sixth embodiment of the present invention.

Symbol Description

10, 20, 30, 40, 50, 60: display device

12, 22, 32, 42, 52, 62: flexible substrate

13, 23, 53: composite layer

131, 231, 336, 436: organic material layer

133, 233, 332, 432, 532: inorganic material layer

135: Antistatic particles

330: Inorganic conductive layer

430, 530, 630: conductive polymer layer

15, 25, 35, 45, 55, 65: electronic components

B: barrier layer

detailed description

The invention proposes a flexible display device. The display device of the embodiment at least includes a flexible substrate, at least one composite material layer on the flexible substrate, and an electronic component on the composite material layer. Wherein, the composite material layer includes an organic material layer and an inorganic material layer (inorganic layer) stacked, and at least one of the inorganic material layer and the organic material layer includes at least one antistatic material. The form of the antistatic material is, for example, antistatic particles or an antistatic layer. The display device of the embodiments can achieve sufficient flexibility and gas barrier properties of electronic components (such as flexible electronic components), and avoid the problems of static electricity accumulation and residual stress. The display device proposed by the embodiment is very widely used, applicable electronic components such as organic light-emitting diode display (OLED), sensor (Sensor), electrophoretic display (Electro-Phoretic Display, EPD), electrochromic display (electrochromic display) , ECD), electrowetting display (Electrowetting Display, EWD), solar display panel (Solar PV) and many other fields can be applied to the embodiments of the present invention.

Several groups of related embodiments of the present invention are described in detail below with reference to the accompanying drawings. It should be noted that the structures and detailed steps provided in the embodiments are for illustration purposes only, and the protection scope of the present invention is not limited to the above-mentioned aspects. Furthermore, the drawings have been simplified to clearly illustrate the content of the embodiments, and the size ratios in the drawings are not drawn in the same proportion as actual products, so they are not used to limit the protection scope of the present invention.

first embodiment

Please refer to FIG. 1 , which is a schematic cross-sectional view of a flexible display device according to a first embodiment of the present invention. In the first embodiment, a display device 10 at least includes a flexible substrate 12 , at least one composite material layer 13 on the flexible substrate 12 , and an electronic component 15 on the composite material layer 13 . Wherein, the composite material layer 13 includes at least one stacked organic material layer (organic layer) 131 and an inorganic material layer (inorganic layer) 133, and at least one of the organic material layer 131 and the inorganic material layer 133 includes at least one Antistatic material. Wherein, the antistatic material can be mixed and distributed in the organic material layer 131 , or distributed in the inorganic material layer 133 , or distributed in the inorganic material layer 133 and the organic material layer 131 . In the process of manufacturing the flexible display device, the flexible substrate 12 can be carried on a carrier (such as a glass carrier) for subsequent manufacturing process, and the carrier is removed after the display device is manufactured.

In one embodiment, the antistatic material accounts for 1 wt % to 10 wt % of the composite material layer 13 , for example.

In the first embodiment, the antistatic material is a plurality of antistatic particles 135 or an anti-static agent, which is mixed in at least one of the inorganic material layer 133 and the organic material layer 131 . As shown in FIG. 1 , the display device 10 includes multiple groups (eg, 3 groups) of composite material layers stacked on the flexible substrate 12 , and the antistatic material is a plurality of antistatic particles 135 mixed and distributed in the organic material layer 131 .

In an embodiment, the antistatic particles 135 are, for example, conductive nanoparticles (conductive nano-particles), carbon fiber (carbon fiber), carbon nanotube (carbon nano-tube), nano-silver wire (nano-Ag wire), or other materials One of the materials, such as particles, or a combination of several different materials.

In an embodiment, the flexible substrate 12 is, for example, a plastic substrate, such as a polyimide (PI) substrate, or other plastic substrates of suitable materials, and a transparent or opaque substrate can be selected according to the type of display to be applied. Material, the present invention does not limit the material of the flexible substrate 12 .

In an embodiment, the material of the inorganic material layer 133 is, for example, silicon nitride (SiNx), silicon oxide (SiOx), silicon oxynitride (SiOxNy), or other inorganic materials with good gas barrier properties. The inorganic material layer 133 is formed by, for example, plasma-enhanced chemical vapor deposition (Plasma-enhanced chemical vapor deposition, PECVD) or other suitable manufacturing techniques. In one embodiment, the thickness of the inorganic material layer 133 is, for example, about range between. In another embodiment, the thickness of the inorganic material layer 133 is, for example, about range between.

In an embodiment, the material of the organic material layer 131 is, for example, an organic polymer or other organic materials with good flexibility. The organic material layer 131 is formed by, for example, a solution-type manufacturing process, such as applying an organic solution through spin coating, or extrusion coating/slit/slot die coating. , or solution casting (solution casting) to form the organic material layer 131 .

Among them, the spin-coating manufacturing process is simple to operate and widely used, but there are a lot of waste photoresist solutions and solvents that need post-processing, and when the substrate size increases (such as greater than 1.0m×1.0m), it is necessary to maintain coating Uniformity is increasingly difficult. Slot coating is to deliver the coating liquid to an extrusion die head through a precision quantitative pump. When the substrate moves below the die head, the coating liquid contacts the substrate to form a film. When the substrate is about to move away from the bottom of the die head, The contact between the coating liquid and the substrate is interrupted, and the slit coating has the characteristics of pre-setting the thickness of the coating film, and has a relatively high uniformity and stability of the coating film under long-term operation. The advantage of solution casting film technology is that it has uniform film thickness distribution, very flat coating film and can produce high temperature resistant film. In actual application, a suitable solution manufacturing process can be selected to manufacture the organic material layer 131 according to various considerations such as the properties of the organic material and the limitations and requirements of the application conditions.

In one embodiment, the antistatic particles 135 can be evenly mixed in the organic solution, and the organic material layer 131 with the electrostatic particles 135 distributed can be formed after the solution is coated. In one embodiment, the thickness of the organic material layer 131 is, for example, about range between. In another embodiment, the thickness of the organic material layer 131 is, for example, about range between.

Furthermore, in the embodiment, if multiple groups of composite material layers 13 are stacked and formed on the flexible substrate 12, the thicknesses of the organic material layers 131 in different groups of composite material layers can be the same or different; similarly, different groups of composite material layers The thicknesses of the inorganic material layers 133 may be the same or different. The present invention is not particularly limited thereto.

According to the composite material layer proposed in the above-mentioned embodiment, its organic material layer 131 provides flexibility, and the inorganic material layer 133 can block moisture/oxygen and other gases from entering the electronic components, and the antistatic material added in the composite material layer ( Types such as particles, dosage forms or film layers) can release charges, prevent the substrate from being generated by static electricity during the manufacturing process, and protect the materials of electronic components from static electricity damage. In one embodiment, a surface resistivity of the composite material layer 13 of the display device is less than 10 ¹¹ Ω, for example, between 10 ⁷ Ω˜10 ¹¹ Ω.

Furthermore, in the superposed structure of one or more groups of organic material layers 131 and inorganic material layers 133 proposed in the embodiment, if there are any fine cracks in the inorganic material layer 133, the presence of the organic material layer 131 can increase the water vapor penetration path. , especially for the laminated structure of multiple sets of composite material layers, an organic material layer 131 is interposed between two inorganic material layers 133 to greatly reduce the water vapor permeability.

In actual application, the composite material layer can be adjusted and changed according to the specifications of the application device, such as changing the number of composite material layers, adjusting the thickness of the organic material layer 131 and the inorganic material layer 133, so as to meet the water vapor permeability of the application device. requirements. For example, liquid crystal displays and electrophoretic displays (EPD) require a water vapor transmission rate of 10 ⁰ to 10 ^-2 g/m ² /day; organic light emitting diode displays (OLED) require a water vapor transmission rate of no more than 10 ^{- 6} g/m ² /day. In one embodiment, the composite material layer has a water vapor transmission rate (Water Vapor Transmission Rate, WVTR) of less than 5×10 ^{- 6} g/m ² /day.

Furthermore, the laminated structure of one or more sets of organic material layers 131 and inorganic material layers 133 proposed in the embodiment can provide flexibility and adjust the stress state of the entire structure. For example, changing the number of groups of composite material layers, or changing the thicknesses of the organic material layer 131 and the inorganic material layer 133 , so as to achieve the flexibility required by the application device and release stress to avoid stress residue. In one embodiment, the stacked flexible substrate 12, one or more sets of composite material layers 13, and the electronic component 15 have a total stress value (stress in sum) that is substantially zero, and is approximately between -10Mpa as measured by an instrument. ~10Mpa.

second embodiment

Please refer to FIG. 2 , which is a schematic cross-sectional view of a flexible display device according to a second embodiment of the present invention. In the second embodiment, a display device 20 at least includes a flexible substrate 22 , at least one composite material layer 23 on the flexible substrate 22 , and an electronic component 25 on the composite material layer 23 . Wherein, the composite material layer 13 includes at least one stacked organic material layer 231 and an inorganic material layer 233 , and at least one of the organic material layer 231 and the inorganic material layer 233 includes at least one antistatic material. During fabrication, the flexible substrate 22 can also be carried on a carrier (such as a glass carrier) for subsequent manufacturing processes, and the carrier can be removed after the display device is manufactured.

Different from the antistatic particles 135 shown in the first embodiment, the antistatic material in the second embodiment is a conductive polymer, and a conductive polymer layer is used as an example of the organic material layer 231. The conductive polymer layer The layer has antistatic properties. In one embodiment, the material of the conductive polymer layer is, for example, poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) [Poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) , PEDOT:PSS]. PEDOT:PSS is a high-conductivity high-molecular polymer aqueous solution, which is composed of PEDOT and PSS. According to different formulations, polymer aqueous solutions with different conductivity can be obtained. The presence of PSS increases the solubility of PEDOT. PEDOT:PSS can be used as a transparent conductive material to replace ITO in flexible electronic components, and its resistance value hardly increases with the number of flexures. The chemical structure of PEDOT:PSS is as follows.

In addition to PEDOT:PSS, other conductive polymer materials with suitable properties (such as transparency, flexibility, static electricity elimination, etc.) can also be used, which is not limited in the present invention.

Similarly, as shown in FIG. 2 , the display device 20 may include, without limitation, multiple groups (such as 3 groups) of stacked composite material layers 23 formed on the flexible substrate 22, and each group of composite material layers 23 includes a A conductive polymer layer (organic material layer 231 ) and an inorganic material layer 233 . Furthermore, in an embodiment, the thicknesses of the conductive polymer layers (organic material layers 231) in different groups of composite material layers can be the same or different, and the thicknesses of the inorganic material layers 233 in different groups of composite material layers 23 can be the same or different, It is not particularly limited.

In one embodiment, the thickness of the inorganic material layer 233 is, for example, about range between. In another embodiment, the thickness of the inorganic material layer 233 is, for example, about range between. In one embodiment, the thickness of the organic material layer 231 (conductive polymer layer) is, for example, about range between. In another embodiment, the thickness of the organic material layer 231 is, for example, about range between.

For other components in the structure, for example, about the flexible substrate 22, the applicable materials of the inorganic material layer 233, and the manufacturing process of the inorganic material layer 233 and the conductive polymer layer (organic material layer 231), please refer to the first embodiment The relevant descriptions in , will not be repeated here.

According to the composite material layer proposed in the second embodiment, its conductive polymer layer (organic material layer 231) provides flexibility and dischargeable charges (static protection), and the inorganic material layer 233 can block the entry of gases such as water vapor/oxygen Electronic component. And the presence of the conductive polymer layer (organic material layer 231) can also increase the water vapor permeation path, so that the composite material layer structure composed of the conductive polymer layer (organic material layer 231) and the inorganic material layer 233 can greatly reduce the water vapor permeation. Rate. Furthermore, the laminated structure of one or more sets of conductive polymer layers (organic material layer 231) and inorganic material layer 233 proposed in the embodiment can adjust the stress state of the entire structure, in addition to achieving the flexibility required by the application device. It can relieve stress and avoid stress residue.

According to the display device proposed in the second embodiment, in one embodiment, the water vapor transmission rate (Water Vapor Transmission Rate, WVTR) of the composite material layer 23 can reach less than 5×10 ^-6 g/m ² /day . In one embodiment, a surface resistivity of the composite material layer 23 of the display device is less than 10 ¹¹ Ω, for example, between 10 ⁷ Ω˜10 ¹¹ Ω. In one embodiment, the stacked flexible substrate 22, one or more sets of composite material layers 23, and the electronic component 25 have a total stress value (stress in sum) that is substantially zero, which is approximately between -10Mpa as measured by an instrument. ~10Mpa.

third embodiment

Please refer to FIG. 3 , which is a schematic cross-sectional view of a flexible display device according to a third embodiment of the present invention. In the third embodiment, a display device 30 at least includes a flexible substrate 32 , at least one composite material layer on the flexible substrate 32 , and an electronic component 35 on the composite material layer. During fabrication, the flexible substrate 32 can also be carried on a carrier (such as a glass carrier) for subsequent manufacturing processes, and the carrier can be removed after the display device is manufactured.

In the third embodiment, the inorganic material layer is an inorganic conductive layer 330 , so the composite material layer includes an inorganic conductive layer 330 and an organic material layer 336 stacked on the inorganic conductive layer 330 . Wherein, the inorganic conductive layer 330 includes an antistatic material, such as a transparent conductor (TC) or a transparent conductive oxide (TCO), to provide a static discharge path. Wherein, the transparent conductive material (TC) is, for example, carbon nano-tube, nano-Ag wire, graphene or other transparent conductive materials. A transparent conductive oxide (TCO) is, for example, ITO, IZO or other transparent conductive oxide materials.

In one embodiment, the thickness of the transparent conductor (TC) is, for example, about Between ranges, it can be formed by sputtering.

In one embodiment, the thickness of the transparent conductive oxide (TCO) is, for example, about Between ranges, it can be formed by a solution-type manufacturing process, such as spin coating (spin coating), or extrusion coating/slit/slot die coating (slit/slot die coating), or solution casting (solution casting) and so on.

Furthermore, in the third embodiment, the composite material layer further includes an inorganic material layer 332 located above the organic material layer 336; wherein, the inorganic material layer 332 and the organic material layer 336 can also be regarded as the inorganic conductive layer 330 (such as: transparent conductive A barrier layer (barrier) B above layer TC/transparent conductive oxide layer TCO). In practical applications, the barrier layer B may also include multiple groups of inorganic material layers 332 and organic material layers 336 stacked on top of the inorganic conductive layer 330 . Therefore, the barrier layer B is located between the electronic component 35 and the inorganic conductive layer 330 (such as TC/TCO).

According to the composite material layer proposed in the third embodiment, its inorganic conductive layer 330 can release electric charges (static protection), the organic material layer 336 can provide flexibility, and the inorganic material layer 332 can block the entry of gases such as water vapor/oxygen Electronic component. Furthermore, the combination of one or more sets of inorganic material layers 332 and organic material layers 336 (ie, the barrier layer B) can not only provide flexibility, but also greatly reduce the water vapor permeability, and can adjust the stress state of the entire structure to release stress.

The display device of the third embodiment is widely used, and is particularly suitable for transparent OLEDs, or bottom-emitting OLEDs, and touch sensors.

According to the display device proposed in the third embodiment, in one embodiment, a water vapor transmission rate (Water VaporTransmission Rate, WVTR) can reach less than 5×10 ⁻⁶ g/m ² /day. In one embodiment, a surface resistivity of the composite material layer of the display device is less than 10 ¹¹ Ω, for example, between 10 ⁷ Ω˜10 ¹¹ Ω. In one embodiment, the stacked structure of the flexible substrate 32 , the stacked inorganic material layer 332 /organic material layer 336 /inorganic conductive layer 330 , and the electronic component 35 has a total stress value that is substantially zero.

Fourth embodiment

Please refer to FIG. 4 , which is a schematic cross-sectional view of a flexible display device according to a fourth embodiment of the present invention. In the fourth embodiment, a display device 40 at least includes a flexible substrate 42 , at least one composite material layer on the flexible substrate 42 , and an electronic component 45 on the composite material layer. During fabrication, the flexible substrate 42 can also be carried on a carrier (such as a glass carrier) for subsequent manufacturing processes, and the carrier can be removed after the display device is manufactured.

In the fourth embodiment, the organic material layer is a conductive polymer layer 430 , so the composite material layer includes a conductive polymer layer 430 and an inorganic material layer 432 stacked on the conductive polymer layer 430 . Wherein, the material of the conductive polymer layer 430 is, for example, an organic material PEDOT:PSS or other organic conductive polymer materials to provide an electrostatic discharge path.

In one embodiment, the thickness of the conductive polymer layer 430 is, for example, about between ranges; in another embodiment, about between. For the relevant description and manufacturing process of the conductive polymer layer 430 , please refer to the second embodiment, and details will not be repeated here.

The composite material layer further includes an organic material layer 436 located above the inorganic material layer 432 . As shown in FIG. 4 , the conductive polymer layer 430 is located on the flexible substrate 42 , the inorganic material layer 432 is located on the conductive polymer layer 430 , and the organic material layer 436 is located on the inorganic material layer 432 . Therefore, the conductive polymer layer 430 and the organic material layer 436 are respectively located on two sides of the inorganic material layer 432 .

In the fourth embodiment, the organic material layer 436 and the inorganic material layer 432 can also be regarded as a barrier layer (barrier) B above the conductive polymer layer 430 . In practical applications, the barrier layer B may also include a combination of a plurality of organic material layers 436 and inorganic material layers 432 stacked on the conductive polymer layer 430 . Therefore, the barrier layer B is located between the electronic element 45 and the conductive polymer layer 430 .

According to the composite material layer proposed in the fourth embodiment, the conductive polymer layer 430 can release charges (static protection) and is flexible, and the inorganic material layer 432 can prevent gases such as moisture/oxygen from entering the electronic components. Furthermore, the combination of one or more sets of organic material layers 436 and inorganic material layers 432 (ie, the barrier layer B) can not only provide flexibility, but also greatly reduce the water vapor permeability, and can adjust the stress state of the entire structure to release stress.

According to the display device proposed in the fourth embodiment, in one embodiment, a water vapor transmission rate (Water VaporTransmission Rate, WVTR) can reach less than 5×10 ⁻⁶ g/m ² /day. In one embodiment, a surface resistivity of the composite material layer of the display device is less than 10 ¹¹ Ω, for example, between 10 ⁷ Ω˜10 ¹¹ Ω. In one embodiment, the stacked structure of the flexible substrate 42, the stacked organic material layer 436/inorganic material layer 432/conductive polymer layer 430, and the electronic component 45 has a total stress value that is substantially zero, measured by an instrument About between -10Mpa ~ 10Mpa.

fifth embodiment

Please refer to FIG. 5 , which is a schematic cross-sectional view of a flexible display device according to a fifth embodiment of the present invention. In the fifth embodiment, a display device 50 includes a flexible substrate 52 , at least one composite material layer 53 on the flexible substrate 52 , and an electronic component 55 on the composite material layer 53 . During manufacture, the flexible substrate 52 can also be carried on a carrier (for example, a glass carrier) for subsequent manufacturing processes, and the carrier can be removed after the display device is manufactured.

In the fifth embodiment, the composite material layer 53 includes a conductive polymer layer 530 and an inorganic material layer 532 formed on the conductive polymer layer 530 . Wherein, the material of the conductive polymer layer 530 is, for example, an organic material PEDOT:PSS or other organic conductive polymer materials, so as to provide an electrostatic discharge path. Different from the fourth embodiment, only the inorganic material layer 532 of pure inorganic material is stacked on the conductive polymer layer 530, such as silicon nitride (SiNx), silicon oxide (SiOx), silicon oxynitride (SiOxNy), or other An inorganic material with good gas barrier properties.

In one embodiment, the thickness of the conductive polymer layer 530 is, for example, about between ranges; in another embodiment, about between. For the relevant description and manufacturing process of the conductive polymer layer 530 , please refer to the second embodiment, and details will not be repeated here.

According to the composite material layer proposed in the fifth embodiment, the conductive polymer layer 530 can release charges (electrostatic protection) and provide flexibility, and the inorganic material layer 532 can prevent gases such as moisture/oxygen from entering the electronic components. Furthermore, the combination of the conductive polymer layer 530 and the inorganic material layer 532 can also adjust the stress state of the entire structure to release the stress.

According to the display device proposed in the fifth embodiment, in one embodiment, a water vapor transmission rate (Water VaporTransmission Rate, WVTR) can reach less than 5×10 ⁻⁶ g/m ² /day. In one embodiment, a surface resistivity of the composite material layer 53 of the display device is less than 10 ¹¹ Ω, for example, between 10 ⁷ Ω˜10 ¹¹ Ω. In one embodiment, the stacked structure of the flexible substrate 52, the inorganic material layer 532, the conductive polymer layer 530, and the electronic component 55 has a total stress value that is substantially 0, which is approximately between -10Mpa and 10Mpa as measured by an instrument. between.

Although the above-mentioned embodiments and the diagrams related to FIGS. 1 to 5 show a flexible substrate and a composite material layer for illustration, the present invention is not limited thereto. Display devices that do not have a single substrate are also within the scope of application of the present invention. For example, in other embodiments, a combination of a flexible substrate and a composite material layer can also be formed above the electronic components (such as 15/25/35/45/55), for example, another or multiple layers of composite materials are formed above the electronic components. Material layer (formed on another flexible substrate) to protect electronic components.

Sixth embodiment

Please refer to FIG. 6 , which is a schematic cross-sectional view of a flexible display device according to a sixth embodiment of the present invention. In the sixth embodiment, a display device 60 includes a flexible substrate 62 , a conductive polymer layer 630 on the flexible substrate 62 , and an electronic component 65 on the conductive polymer layer 630 . The material of the conductive polymer layer 630 is, for example, an organic material PEDOT:PSS or other organic conductive polymer materials to provide an electrostatic discharge path. During manufacture, the flexible substrate 62 can also be carried on a carrier (for example, a glass carrier) for subsequent manufacturing processes, and the carrier can be removed after the display device is manufactured.

In one embodiment, the thickness of the conductive polymer layer 630 is, for example, about between ranges; in another embodiment, about between. For the relevant description and manufacturing process of the conductive polymer layer 530 , please refer to the second embodiment, and details will not be repeated here.

According to the display device proposed in the sixth embodiment, its conductive polymer layer 630 can release charges (electrostatic protection) and provide flexibility, and can also adjust the stress state of the entire structure to release stress, so that a total stress of the stacked structure The value is close to 0, which is between -10Mpa and 10Mpa measured by the instrument.

The display device of the sixth embodiment is suitable for sensor and electrophoretic display (EPD).

According to the display device with flexibility and electrostatic protection proposed in the above embodiments, an inorganic material layer and an organic material layer are stacked, and at least one of the inorganic material layer and the organic material layer includes at least one antistatic material The form of the antistatic material is, for example, antistatic particles, antistatic agent, or antistatic layer (such as TC/TCO, or polymer conductive layer). The display device of the embodiment can make the electronic components (such as flexible electronic components) meet the flexibility and gas barrier properties required by the product, and can discharge electrostatic charges, which has the characteristics of electrostatic protection. Furthermore, through the design of the thickness and/or the number of stacked layers of the organic material and the inorganic material, the stress of the overall structure can be released and the problem of residual stress can be avoided. The display device proposed by the embodiment is widely used, such as organic light emitting diode display (OLED), sensor (Sensor), electrophoretic display (EPD), electrochromic display (ECD), electrowetting display (EWD), solar display It can be applied in many different fields such as panels (Solar PV).

In summary, although the present invention has been disclosed in conjunction with the above embodiments, they are not intended to limit the present invention. Those skilled in the art to which the present invention belongs can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be defined by the appended claims.

Claims (10)

1. a kind of display device, at least includes：

Flexible base plate；

An at least composite layer, on the flexible base plate, the composite layer includes an organic material layer and of stacking Inorganic material layer, and the inorganic material layer and at least one layer of the organic material layer include an at least anti-static material；With

Electronic component, on the composite layer,

Wherein the flexible base plate contacts the organic material layer, and the electronic component contacts the inorganic material layer.

2. display device as claimed in claim 1, the wherein anti-static material are multiple antistatic particles or an antistatic additive, It is mixed in the inorganic material layer and the organic material layer at least one of which.

3. display device as claimed in claim 1, the wherein organic material layer include the anti-static material, the anti-static material It is a conducting polymer.

4. display device as claimed in claim 3, the wherein composite layer also include another organic material layer.

5. display device as claimed in claim 1, the wherein inorganic material layer include the anti-static material, the anti-static material It is a transparent conductive material or a transparent conductive oxide.

6. display device as claimed in claim 5, the wherein composite layer also include another inorganic material layer.

7. display device as claimed in claim 1, wherein an aqueous vapor penetrance of the composite layer are less than 5x10^-6g/m²/ day。

8. display device as claimed in claim 1, wherein anti-static material accounts for the 1wt%~10wt% of the composite layer Percentage by weight.

9. display device as claimed in claim 1 a, sheet resistance value of its composite layer is less than 10¹¹Ω。

10. display device as claimed in claim 1, wherein the flexible base plate for stacking, the composite layer and the electronics unit Part has the total stress value for being essentially 0.