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CN210009521U - OLED (organic light emitting diode) mask - Google Patents

️Tue Feb 04 2020

Detailed Description

As used herein, "top" means furthest from the substrate, and "bottom" means closest to the substrate. Where the first layer is described as being disposed "on" the second layer, the first layer is disposed farther from the substrate. Other layers may be present between the first and second layers, unless it is specified that the first layer is "in contact with" the second layer. For example, a cathode may be described as being disposed "on" an anode even though various organic layers are present between the cathode and the anode.

As used herein, the term "OLED light-emitting panel" (OLED panel) includes a substrate, an OLED device, an encapsulation layer, and at least one anode contact and one cathode contact extending out of the encapsulation layer for driving. The OLED device includes an anode layer, a cathode layer, and one or more organic light emitting layers disposed between the anode layer and the cathode layer. The OLED device does not include a substrate and an encapsulation layer, which are already present in OLED light emitting panels. As used herein, the term "encapsulation layer" may be a thin film encapsulation having a thickness of less than 100 microns, which includes the application of one or more thin films directly to the device surface, or may also be a cover glass (cover glass) adhered to a substrate. As used herein, the term "flexible printed circuit" (FPC) refers to any flexible substrate coated with any one or combination of the following, including but not limited to: conductive lines, resistors, capacitors, inductors, transistors, micro-electro-mechanical systems (MEMS), and the like. The substrate of the flexible printed circuit may be plastic, thin film glass, a metal film coated with an insulating layer, fabric, leather, paper, or the like. A flexible printed circuit board is typically less than 1mm thick, more preferably less than 0.7mm thick. As used herein, the term "light extraction layer" may refer to a light diffusion film or other microstructure for light extraction, as well as a thin film layer having a light extraction effect. The light extraction layer can be located on the substrate surface of the OLED light-emitting panel, or can be located in other suitable positions, such as between the substrate and the anode, or between the organic layer and the cathode/anode, between the cathode and the encapsulation layer, on the surface of the encapsulation layer, and so on. As used herein, the term "complementary" may refer to the shape or outline of two objects being related to each other in a manner that fills the gap of each other equally, but the combination of the two will complete it. As used herein, the term "conjugate" may refer to the combination of the shapes or contours of two objects in a pair-wise fashion. They will have common parts but in some particular places are opposite, or mirror images, and the combination of the two will make them complete. In this application, "conjugated" binding is a special case of "complementary" binding. As used herein, the term "representative" means the same or substantially similar but does not require that the contours or areas be exactly the same, including but not limited to the contours being the same but having a proportional expansion in the perimeter, or contours having a similarity of 60% or more, or having an area of 60% or more. The similarity (60% as described above) can be evaluated by specific image processing recognition software or tools.

According to one embodiment of the present invention, there is disclosed an OLED face mask including:

at least one flexible OLED light-emitting panel,

wherein the at least one flexible OLED light emitting panel further comprises a light emitting area,

wherein the light emitting area of the flexible OLED light emitting panel represents at least a portion of a human face.

According to one embodiment of the present invention, further comprising a cut, wherein the cut does not coincide with the light emitting area.

According to one embodiment of the invention, said cuts are distributed substantially in at least one of the following areas: nose region, eye region, forehead region, cheek region, neck region, mouth region.

According to one embodiment of the invention, two or more flexible OLED light emitting panels are included.

According to one embodiment of the invention, the peak of the emission spectrum of the flexible OLED light emitting panel is between 400nm and 1500 nm.

According to one embodiment of the invention, wherein the flexible OLED light-emitting panel further comprises one or more pixels.

According to one embodiment of the invention, at least two of the pixels emit light with peak wavelengths that differ by 10 nm.

According to one embodiment of the invention, at least one pixel emits blue light with the peak wavelength between 400-500nm, or green/yellow light with the peak wavelength between 500-580nm, or red light with the peak wavelength between 580-800nm, or near infrared light with the peak wavelength between 800-1500 nm.

According to an embodiment of the invention, the light emitting area of the flexible OLED light emitting panel represents at least 60% of a human face.

According to another embodiment of the present invention, there is disclosed an OLED face mask including:

a first flexible substrate comprising a first surface, a second surface, and an outer boundary;

a first OLED device disposed over a portion of the first surface of the first flexible substrate;

a first encapsulation layer disposed over the first OLED device;

a second flexible substrate comprising a first surface, a second surface, and an outer boundary;

a second OLED device disposed over a portion of the first surface of the second flexible substrate;

a second encapsulation layer disposed over the second OLED device;

wherein the first flexible substrate is shaped to represent a first portion of a human face when viewed from a first surface of the first flexible substrate, and the second flexible substrate is shaped to represent a second portion of the human face when viewed from a first surface of the second flexible substrate;

wherein the first flexible substrate and the second flexible substrate are connected in a complementary manner along a portion of the outer boundary of the first and second flexible substrates.

According to an embodiment of the invention, wherein the second flexible substrate has a mirror image shape of the first substrate when viewed from the first surface of the first and second flexible substrates and is joined along a part of said outer boundary being substantially the centre line of a human face.

According to one embodiment of the invention, further comprising an incision to partially or completely expose the primary eye area.

According to one embodiment of the invention, the peak of the emission spectrum of the OLED device is between 400nm and 1500 nm.

According to one embodiment of the invention, wherein the first OLED device and the second OLED device further comprise one or more pixels.

According to one embodiment of the present invention, further comprising a battery, wherein the battery is a thin film battery.

According to one embodiment of the present invention, wireless communication circuitry is further included to allow remote control.

According to an embodiment of the invention, said outer boundary of the junction does not overlap the first OLED device or the second OLED device.

According to one embodiment of the present invention, wherein the first flexible substrate and the second flexible substrate are connected by an adhesive.

According to an embodiment of the invention, the first flexible substrate and the second flexible substrate are connected by an elastic band.

According to one embodiment of the present invention, wherein the bungee cord further comprises a drive wire.

According to one embodiment of the present invention, wherein the elastic band further comprises a battery.

According to an embodiment of the present invention, the first and second flexible substrates each further comprise a third encapsulation layer, wherein the third encapsulation layer is disposed on at least one of the first and second surfaces of the first and second flexible substrates.

According to one embodiment of the present invention, further comprising a support film, wherein the support film is disposed on one or both of the first flexible substrate and the second flexible substrate.

According to one embodiment of the invention, wherein the support film is a flexible printed circuit board.

According to an embodiment of the invention, further comprising at least one light emitting side.

According to an embodiment of the invention, at least one of said light-emitting sides emits light substantially towards the wearer's face.

According to an embodiment of the invention, at least one of said light emitting sides is substantially non-emitting towards the wearer's face.

According to an embodiment of the invention, the light emitting side emits light substantially only towards the wearer's face.

According to an embodiment of the invention, wherein the light extraction layer is arranged on the side of the light emitting side.

According to an embodiment of the invention, further comprising a pair of ear hooks, wherein each ear hook is connected to a part of said outer boundary of the first and second flexible substrates being substantially the ear area.

According to one embodiment of the invention, wherein the first flexible substrate is cut to be substantially the eye region.

According to an embodiment of the invention, wherein the first flexible substrate and the second flexible substrate are laser cut.

According to one embodiment of the present invention, the first flexible substrate represents at least 60% of a first portion of a face of a person, and the second flexible substrate represents at least 60% of a second portion of the face of the person.

According to still another embodiment of the present invention, there is disclosed a method of preparing an OLED face mask, including:

providing a first flexible substrate comprising a first surface, a second surface, and an outer boundary;

disposing a first OLED device on a first surface of a first flexible substrate;

disposing a first encapsulation layer over the first OLED device;

providing a second flexible substrate comprising a first surface, a second surface, and an outer boundary;

disposing a second OLED device on a first surface of a second flexible substrate;

disposing a second encapsulation layer over the second OLED device;

cutting the first flexible substrate into a shape that represents a first portion of a human face when viewed from a first surface of the first flexible substrate;

cutting the second flexible substrate into a shape that represents a second portion of the face when viewed from the first surface of the second flexible substrate;

the first flexible substrate and the second flexible substrate are connected in a complementary manner along a portion of an outer boundary of the first flexible substrate and the second flexible substrate.

According to an embodiment of the present invention, wherein the second flexible substrate is cut to have a mirror image shape of the first flexible substrate when viewed from the first surfaces of the first and second flexible substrates, and the first flexible substrate and the second flexible substrate are joined along a part of the outer boundary substantially being a center line of a human face.

According to an embodiment of the invention, the first flexible substrate and the second flexible substrate are connected by an elastic band.

According to one embodiment of the invention, wherein the elastic band further comprises a wire.

According to one embodiment of the present invention, wherein the first flexible substrate and the second flexible substrate are connected by an adhesive.

According to an embodiment of the invention, further comprising providing a pair of ear hooks, wherein each ear hook is connected to a portion of said outer boundary of the first flexible substrate and the second flexible substrate being substantially in the ear region.

According to an embodiment of the invention, said outer boundary of the junction does not overlap the first OLED device or the second OLED device.

According to one embodiment of the invention, wherein the first OLED device and the second OLED device further comprise one or more pixels.

According to one embodiment of the present invention, there is further included integrating a battery into one or both of the first flexible substrate and the second flexible substrate.

According to an embodiment of the present invention, further comprising disposing a support film on one or both of the first flexible substrate and the second flexible substrate.

According to an embodiment of the present invention, further comprising providing a light extraction layer on any one of the first surface and the second surface of the first flexible substrate and the second flexible substrate.

According to an embodiment of the present invention, further comprising disposing a third encapsulation layer on one or both of the first and second surfaces of the first and second flexible substrates.

According to one embodiment of the invention, the first flexible substrate is cut into a shape substantially of the eye region.

According to an embodiment of the invention, wherein the first flexible substrate and the second flexible substrate are laser cut.

According to an embodiment of the invention, the first flexible substrate represents at least 60% of a first part of a human face and the second flexible substrate represents at least 60% of a second part of the human face.

According to yet another embodiment of the present invention, there is disclosed a cosmetic or medical use of the OLED facial mask as described above.

Flexible OLEDs are key to wearable or near-body applications. Flexible OLEDs can be fabricated on a variety of flexible substrates including, but not limited to, Polyimide (PI), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), metal films, fabrics, leather, paper, and the like. For applications such as facial or eye masks, where the device is intended to be conformable, commonly used substrates are PI, PET, PEN and have a thickness of no more than 0.3 mm. When used in a slimming strip, the substrate may be PI, PET, PEN, leather or fabric, and has a thickness of not more than 1 mm. The flat layer can be applied to the prepared side of the substrate, i.e. the side to be coated with the OLED. The substrate may be coated with a thin film encapsulation layer on the prepared side or on both sides. A layer of anode is deposited on the substrate and patterned by a reticle or a reticle. Multiple organic layers are applied to a substrate on which an anode is deposited, followed by deposition of a cathode. Alternatively, one or more functional layers may be printed on the flexible substrate. The anode, organic layer and cathode constitute a basic OLED device. Materials and methods for preparing anodes, organic layers, and cathodes are well known to those skilled in the art. A thin film encapsulation layer may be added over the cathode. The thin film encapsulation layer may be an organic layer or, more preferably, an alternating combination of organic and inorganic layers. At least one pair of contact electrodes, including at least one cathode and one anode, extend outside the package area for external electrical driving. A flexible printed circuit board (FPC) may be printed in advance with a circuit for connecting the flexible OLED to an external driver or internally connecting a plurality of OLEDs. The FPC board may be electrically bonded to the OLED contact electrodes with a conductive paste. The assembly of flexible OLEDs onto FPCs is described in application CN201810572632.3, incorporated by reference in its entirety. In some embodiments, external actuation may be achieved by soldering wires on the electrical contacts. A light extraction layer may be added to the light emitting face of the flexible OLED. A support film may be added to the non-light emitting face of the flexible OLED. A basic OLED device, an encapsulation layer and an external driving scheme are combined with an optional light diffusion film, an FPC board and a supporting board to form an OLED light-emitting panel. The fabrication of flexible OLEDs is well known to those skilled in the art and is not limited to the above description.

A schematic cross-sectional view of such a flexible OLED light-emitting panel is shown in fig. 1 a. The

flexible OLED

300 light emitting panel comprises a

substrate

301, an

OLED device

310, a pair of

contact electrodes

303 electrically connected to the

OLED device

310, a thin

film encapsulation layer

302 exposing the

contact electrodes

303, a

bonding structure

304 connecting the pair of

contact electrodes

303 to external driving circuits, and a

cover film

305.

OLED device

310 can be a bottom emitting device, a top emitting device, or a transparent device, i.e., both sides can emit light. The cover film may be a flexible printed circuit board on which circuitry is pre-printed that is electrically connected to the

OLED device

310 through the

adhesive structure

304. In another alternative, the

adhesive structure

304 may be an FPC frame and the

cover film

305 may be a sheet of plastic film to provide mechanical support. The

cover film

305 may also be a light extraction layer. The

cover film

305 may be transparent. Additional thin film encapsulation layers 306 may be applied to one or both sides of the

substrate

301 as shown in fig. 1 b. The cover film may also be coated with an additional thin

film encapsulation layer

306, but is not shown in this figure. In fig. 1c, a

light extraction layer

307 may be added on the light emitting face side. If the OLED is a bottom emitting device, a light extraction layer can be added on the substrate side. In another approach, if the OLED is a top-emitting device, a

light extraction layer

307 may be added on the

encapsulation layer

306. Such a flexible OLED light-emitting panel will be the basis for a medical light-emitting device as described below.

The first embodiment:

in a first embodiment, we disclose a medical-effect OLED face mask. Half an

OLED face mask

400 is shown in fig. 2. The half mask includes a flexible OLED

light emitting panel

410, a

cavity

403 to leak out of the eye portion, and an

optional hook

404 to hook the mask over the user's ear. The flexible OLED

light emitting panel

410 further includes a non-light

emitting region

401 and a

light emitting region

402. The non-light

emitting region

401 may include a portion of a substrate, a portion of a thin film encapsulation layer, a contact electrode, a portion of an FPC board, a portion of a light extraction layer, and/or a portion of a support film. The flexible OLED light-emitting panel is shaped to represent a human face and can have a similarity of more than 60%, including one or more of the following combinations, a forehead region, an eye region, a cheek region and a neck region. As used herein, "representative" means the same or substantially similar but not necessarily identical in contour or area, and includes, but is not limited to, contours of the same shape but having a contour perimeter that is proportionally more flexible, contours of 60% or more similarity, or contours of 60% or more area. The similarity (60% as described above) can be evaluated by specific image processing recognition software or tools. The

light emitting region

402 may comprise more than 50% of the total flexible OLED light emitting panel area, and more preferably more than 80% of the total flexible OLED light emitting panel area. The graphic design of such masks is well known to those skilled in the art, where a two-dimensional plane can be cut to convert to a three-dimensional mask. In particular, to allow for expansion of the flexible OLED lighting panel, additional cuts are necessary in the chin and cheek areas (e.g., cut line 406) at the nose (e.g., cut line 405), and in the midline of the neck. The flexible OLED

light emitting panel

410 may be laser cut to the desired shape. The

light emitting region

402 may be continuous across the substrate as shown in fig. 2. In another arrangement, as shown in fig. 3, the

light emitting region

402 may be divided into several regions, where one portion 411 may substantially cover the forehead region and another portion 412 covers the cheek region. Also, the illustration in the figures is merely schematic and any other figure may be used. The separation of the light emitting regions may be achieved by separating one or more of an anode layer, an organic layer, and a cathode layer. It may also be realized by a separate substrate. At this time, a support film may be added to all individual substrates to add mechanical support. The plurality of

light emitting regions

402 may be dot-connected to an external power source through an FPC board. The plurality of light emitting regions may be connected in parallel or driven individually. The

light emitting region

402 may further comprise a plurality of pixels, wherein at least one pixel emits blue light having a peak wavelength of 400-500nm, one pixel emits yellow-green light having a peak wavelength of 500-580nm, and one pixel emits red light having a peak wavelength of 580-800 nm. A plurality of pixels emitting the same wavelength may be connected in parallel, and pixels of different wavelengths are driven separately. By using RGB pixels, spectral tunability can be achieved. The

OLED face mask

400 further includes a

light emitting face

408 and a

non-light emitting face

409. In the example of fig. 2, the

light emitting face

408 is directed out of the paper plane, while the

non-light emitting face

409 is directed in the paper plane.

The other half of the OLED face film has a substrate and light emitting area that is a mirror image of the half as viewed from the

light emitting face

408. Fig. 4 shows two

flaps

400 and 500 of a mirror image OLED face film that have not yet been attached, which when attached will constitute an

OLED face film

600. The two flaps of the mask can be attached along

attachment lines

601 as shown. This constitutes a conjugate fit, i.e. the two lobes along the

line

601 of the fit constitute mirror images. The

fit line

601 is approximately the centerline position of the face. Note that the illustrated line of

attachment

601 is merely exemplary, and other types of attachment lines may be used, such as attachment along a segment of the line of

attachment

601. The

bonding line

601 does not emit light and is part of a non-light-emitting region. The bonding process may be accomplished by, but is not limited to, adhesive bonding, heat bonding, pressure bonding, stitching, clamping, and the like. A three-dimensional effect of the final

OLED face film

700 from a non-light emitting side is shown in fig. 5a, including the

attachment line

601, and the

extra cut lines

405 and 406. A two-dimensional effect plot of the final

OLED face mask

710 from the light emitting face is shown in fig. 5b, which includes two-lobed

OLED face masks

400 and 500. For good face fit, the two-dimensional design of the OLED mask is critical, and additional cuts may be needed to help expand the substrate material to achieve three-dimensional transformation. This is a very different strategy than preparing a simple flexible OLED lighting panel. It is also a novel way to attach two-flap two-dimensional facial masks. This has several benefits: 1, when the light-emitting area is reduced to at least two lobes, the production yield can be improved; 2, the fit with the face is improved along with the use of the two-piece facial mask; 3, the two-piece facial mask is easy to fold into a two-dimensional form, so that the packaging and transportation cost is reduced. An

elastic band

407 may be attached to the

OLED mask

720 in place of ear hooks and around the user's head as shown in fig. 6. Elastic strips 407 may further integrate conductive wires to drive the OLED mask and a battery to drive the flexible OLED light emitting panel. In addition, the controller and the wireless communication device can also be integrated into the elastic band, so that a user can control the luminous mask through other equipment such as a mobile phone, a notebook, a computer, a smart watch and the like.

In some embodiments, the OLED face mask need not be cut out of the eye area, as shown in fig. 7 a. In other embodiments, the eye region may be partially cut out (e.g., 901), as shown in FIG. 7 b. This configuration may provide the flexibility to treat the eye only when needed. In other embodiments, the mask may further comprise a neck region, as shown in fig. 8. Here, the flexible OLED light emitting panel covering the neck area may be an extension of a half sheet of film, or may be a separate muffler. Note that fig. 8 is only an example of this application, and other figures may be used as long as they cover 60% of the neck area.

In addition, the two-lobed OLED face mask may also exhibit a complementary shape. Fig. 11 illustrates an example where an upper half mask 421 and a lower half OLED mask 422 may be combined by a bonding wire 423 to form a complete OLED mask 420. In this example, the two-lobed OLED face mask does not appear as a mirror image, but rather appears to intermesh at the bondline locations.

The OLED mask may provide the following possible therapeutic effects, but is not limited to:

1. when the luminous wavelength is greater than 580nm, the collagen growth is stimulated, the fatigue resistance is increased, and the cell metabolism is stimulated;

2. at a luminescence wavelength <500nm, comedolytic inflammation is eliminated: antibacterial, antiinflammatory, regenerating, sebum secretion inhibiting, and antiaging effects;

3. when the luminous wavelength is 500-580nm, the pigment is balanced, fine wrinkles are slowed down, nutrition is supplied to aged skin, and wound healing is accelerated;

4. when white light is emitted, the time difference reaction is slowed down by imitating sunlight.

Second embodiment:

next, we disclose a medically effective OLED eye patch. Fig. 9 shows an example of the eyecup. The

OLED eye patch

800 includes a

substrate

801, two

light emitting areas

802, and an

elastic band

803. The

OLED eye patch

800 further includes a

light emitting face

808 and a

non-light emitting face

809. As shown in fig. 9, the

light emitting surface

808 is directed out of the plane of the paper and the

non-light emitting surface

809 is directed into the plane of the paper. The

substrate

801 and the two

light emitting areas

802 may be part of the same flexible OLED light emitting panel. In another approach, the two

light emitting areas

802 may be from two separate flexible OLED light emitting panels. In this case, two flexible OLED light emitting panels may be attached in a conjugate fashion along

attachment line

804, with the two panel graphics being mirror images when viewed from the

light emitting surface

808. The two

light emitting regions

802 may be connected in parallel. Also, the

elastic band

803 integrates a cable and a battery for external driving. The controller and wireless communication device may further be integrated into the eye shield for remote control. Similarly, the light emitting region may comprise RGB pixels.

The OLED eyewear may provide possible medical effects, but is not limited to:

1. when the white light is emitted, the time difference reaction is slowed down by imitating sunlight;

2. promoting sleep environment when the light emitting wavelength is greater than 580 nm;

3. depressurize and provide a sense of relaxation;

4. when the luminous wavelength is greater than 580nm, the collagen growth is stimulated, the fatigue resistance is increased, and the cell metabolism is stimulated;

5. at a luminescence wavelength <500nm, comedolytic inflammation is eliminated: antibacterial, antiinflammatory, regenerating, sebum secretion inhibiting, and antiaging effects;

6. when the luminous wavelength is 500-580nm, the pigment is balanced, fine wrinkles are slowed down, nutrition is supplied to aged skin, and wound healing is accelerated.

Third embodiment:

in this embodiment, we disclose an OLED face mask that does not require two separate flexible OLEDs. As shown in fig. 10a, the

OLED mask

100 has a light-emitting

region

110 and a non-light-emitting

region

111.

Light emitting region

110 includes an OLED device. The OLED device may also include a plurality of pixels, and similarly, the pixels may emit red, green, and blue colors.

Incisions

105 and 108 are used to expose the nose and mouth regions, while incisions 101,102,106 and 107 are used for expansion during 3D conversion. Note that additional cuts may be introduced to assist in the 3D conversion, and those skilled in the art will have knowledge to design this. Ear hooks 109 are attached to both sides of the mask. Alternatively, the headband may be applied as previously described, but is not shown here. The

OLED mask

100 has no exposed eye area and is suitable for wearing during rest, sleep or eye treatment. Alternatively, as shown in fig. 10b, the eye area may be partially cut out, with

additional cuts

103 and 104 added to the eye area in the

OLED mask

200. The

OLED face film

200 includes different

light emitting regions

210 and non-light emitting

regions

211. In another example, OLED face mask 300 (see fig. 10c) includes

light emitting regions

310 and non-light emitting regions 311, wherein complete ablation of the eye area is achieved by

incisions

303 and 304. Such masks are preferred when the wearer needs to do something else during treatment.

It should be understood that the various embodiments described herein are illustrative only and are not intended to limit the scope of the invention. Thus, the invention as claimed may include variations from the specific embodiments and preferred embodiments described herein, as will be apparent to those skilled in the art. Many of the materials and structures described herein may be substituted with other materials and structures without departing from the spirit of the present invention. It should be understood that various theories as to why the invention works are not intended to be limiting.