TWI851981B - Switchable floating image display device - Google Patents

Abstract

A switchable floating image display device including a light-emitting stack layer, a light-emitting pattern stack layer, a transparent blocking layer, an optical imaging module, and a power supply module is provided. The light-emitting stack layer is configured to generate a first pattern beam. The light-emitting pattern stack layer is configured to generate a second pattern beam. The transparent blocking layer is disposed between the light-emitting stack layer and the light-emitting pattern stack layer. The optical imaging module is configured to make the first pattern beam form a first floating image, and make the second pattern beam form a second floating image. The power supply module is electrically connected to the light-emitting stack layer and the light-emitting pattern stack layer, and configured to switch the light-emitting stack layer or the light-emitting pattern stack layer to emit light, so as to determine the first floating image or the second floating image to be formed.

Description

Switchable floating image display device

The present invention relates to a display device, and in particular to a switchable floating image display device.

As the COVID-19 pandemic spreads around the world, contactless technology has become more important, as it can effectively prevent the risk of virus contact transmission from public utensils. By using contactless interface technology, users do not need to touch the surface of objects, which can avoid the retention of body fluids and destroy the route of indirect contact transmission.

For example, if floating image buttons are created to replace traditional physical buttons, people can perform normal operations such as taking the elevator, opening and closing doors, or pressing the doorbell without causing contact infection.

Traditional stereo image switchable designs use a monitor to display different images to achieve the image switching effect. However, monitors are expensive and have a complex design, making them difficult to integrate into devices that require low cost or small size, such as floating image buttons.

The present invention provides a switchable floating image display device, which has the advantages of simple structure and switchable floating images.

An embodiment of the present invention provides a switchable floating image display device, including a light-emitting stacking layer, a light-emitting pattern stacking layer, a transparent barrier layer, an optical imaging module and a power supply module. The light-emitting stacking layer is used to generate a first pattern light beam, and the light-emitting pattern stacking layer is used to generate a second pattern light beam. The transparent barrier layer is arranged between the light-emitting stacking layer and the light-emitting pattern stacking layer to block the electrical connection between the light-emitting stacking layer and the light-emitting pattern stacking layer. The optical imaging module is used to make the first pattern light beam form a first floating image, and to make the second pattern light beam form a second floating image. The power supply module is electrically connected to the light emitting stack layer and the light emitting pattern stack layer, and is used to determine the generation of the first floating image or the second floating image by switching the light emitting stack layer or the light emitting pattern stack layer to emit light.

In the switchable floating image display device of an embodiment of the present invention, a light emitting stack layer and a light emitting pattern stack layer can be used to generate a first pattern light beam and a second pattern light beam respectively. The optical imaging module makes the first pattern light beam form a first floating image and the second pattern light beam form a second floating image. The power supply module determines whether to generate the first floating image or the second floating image by switching the light emitting stack layer or the light emitting pattern stack layer to emit light. Therefore, the switchable floating image display device of an embodiment of the present invention can have the advantages of simple structure and switchable floating images.

FIG1 is a simplified schematic diagram of a switchable floating image display device of an embodiment of the present invention, FIG2A is a simplified schematic diagram of the light-emitting stacking layer of FIG1 when emitting light, FIG2B is a simplified schematic diagram of the light-emitting pattern stacking layer of FIG1 when emitting light, FIG3A is a schematic diagram of a first floating image and a user's finger provided by the light-emitting stacking layer when emitting light, FIG3B is a schematic diagram of a second floating image and a user's finger provided by the light-emitting pattern stacking layer when emitting light, and FIG4 is a three-dimensional schematic diagram showing a possible appearance of the switchable floating image display device of FIG1 and one of the floating images formed thereby. 1 to 4 , the switchable floating image display device 100 of this embodiment includes a light emitting stack layer 200, a light emitting pattern stack layer 300, a transparent barrier layer 110, an optical imaging module 120 and a power supply module 130. The light emitting stack layer 200 is used to generate a first pattern light beam 202, and the light emitting pattern stack layer 300 is used to generate a second pattern light beam 302. In this embodiment, the light-emitting stack layer 200 can generate a light-emitting pattern 201 as shown in FIG. 2A , and the light-emitting stack layer 300 can generate a light-emitting pattern 301 as shown in FIG. 2B . The light-emitting patterns 201 and 301 in FIG. 2A and FIG. 2B are only schematically illustrated. In fact, in one embodiment, the light-emitting patterns 201 and 301 can be designed as more complex light-emitting patterns as required, that is, they can be various regular or irregular light-emitting patterns.

The transparent barrier layer 110 is disposed between the luminescent stack layer 200 and the luminescent pattern stack layer 300 to block the electrical connection between the luminescent stack layer 200 and the luminescent pattern stack layer 300, wherein the transparent barrier layer 110 is, for example, a transparent insulating layer, and its material can be silicon oxide, silicon nitride, epoxy resin, silicone or other appropriate insulating materials. The optical imaging module 120 is used to make the first pattern light beam 202 form a first floating image (such as the first floating image 203 shown in FIG. 3A), and to make the second pattern light beam 302 form a second floating image (such as the second floating image 303 shown in FIG. 3B). In this embodiment, the optical imaging module 120 is, for example, a lens array, which may have a plurality of micro lenses 122 arranged in a two-dimensional array, so that the first pattern light beam 202 and the second pattern light beam 302 form a first floating image and a second floating image, wherein the first floating image and the second floating image are light field images. In other words, the optical imaging module 120 reconstructs the travel direction and intensity of the first pattern light beam 202 and the second pattern light beam 302, and forms many intersection points of light in the three-dimensional space in front of the optical imaging module 120. These intersection points simulate the light reflected from the surface of a real object. When these lights are transmitted to the user's eyes, the user will feel that there are three-dimensional floating images (i.e., the first floating image and the second floating image) that simulate three-dimensional real objects in the space. The luminous pattern 201 generated by the luminous stack layer 200 and the luminous pattern 301 generated by the luminous stack layer 300 are matched with the optical imaging module 120, and the expected light field image is formed by reconstructing the first pattern light beam 202 and the second pattern light beam 302 by the optical imaging module 120. The luminous patterns 201 and 301 in FIG. 2A and FIG. 2B are only briefly illustrated. In fact, when it is desired to form the light field image (i.e., the first floating image 203 and the second floating image 303) as shown in FIG. 3A and FIG. 3B, the luminous patterns 201 and 301 corresponding to the optical imaging module 120 will be more complicated than those shown in FIG. 2A and FIG. 2B. However, in order to simplify the diagrams to facilitate understanding, the luminous patterns of the luminous stacking layer 200 and the luminous pattern stacking layer 300 in the following embodiments are all simplified, but in actual applications, there are more complex patterns that are matched with the optical imaging module 120. In this embodiment, the first floating image 203 and the second floating image 303 are, for example, three-dimensional images. However, in other embodiments, the first floating image 203 and/or the second floating image 303 can also be a plane image.

In addition to being a lens array, in other embodiments, the optical imaging module 120 may include a grating, a photonic crystal, or an optical fiber. These optical elements can also achieve the effect of reconstructing the traveling direction and intensity of the first pattern light beam 202 and the second pattern light beam 302 to form a light field image.

The power supply module 130 is electrically connected to the light emitting stack layer 200 and the light emitting pattern stack layer 300, and is used to determine the generation of the first floating image or the second floating image by switching the light emitting stack layer 200 or the light emitting pattern stack layer 300 to emit light. The first floating image and the second floating image may have different shapes, distribution ranges, colors, brightness or a combination thereof.

FIG5 is a cross-sectional schematic diagram of the detailed structure of the switchable floating image display device of FIG1. Referring to FIG1 and FIG5, the light-emitting stack layer 200 includes a first electrode 210, a second electrode 220, and a first patterned light-emitting layer 230, wherein the first patterned light-emitting layer 230 is disposed between the first electrode 210 and the second electrode 220, and is used to form a first patterned light beam 202. The light-emitting patterned stack layer 300 includes a third electrode 310, a fourth electrode 320, and a second patterned light-emitting layer 330, wherein the second patterned light-emitting layer 330 is disposed between the third electrode 310 and the fourth electrode 320, and is used to form a second patterned light beam 302. In this embodiment, the second electrode 220, the third electrode 310 and the fourth electrode 320 may be transparent electrodes to allow the first pattern light beam 202 and the second pattern light beam 302 to pass through. In this embodiment, the material of the second electrode 220, the third electrode 310 and the fourth electrode 320 may be, for example, indium tin oxide (ITO) or other transparent conductive materials. The material of the first electrode 210 may be metal or a transparent conductive material. In other words, the first electrode 210 may be an opaque electrode or a transparent electrode.

In this embodiment, the light-emitting stack layer 200 may further include a first pattern definition layer 240, for example, for defining the patterns of the first patterned light-emitting layer 230 and the first electrode 210. The light-emitting pattern stack layer 300 may further include a second pattern definition layer 340, for example, disposed between the third electrode 310 and the fourth electrode 320, for defining the pattern of the second patterned light-emitting layer 330. The pattern of the first pattern definition layer 240 and the pattern of the first patterned light-emitting layer 230 and the first electrode 210 may be complementary patterns, and the pattern of the second pattern definition layer 340 and the pattern of the second patterned light-emitting layer 330 may be two complementary patterns. The second patterned definition layer 340 can be formed of a transparent insulating material to facilitate the passage of the first patterned light beam 202. The first patterned definition layer 240 can be formed of an insulating material, including a transparent insulating material or an opaque insulating material. In addition, in this embodiment, the luminescent pattern stacking layer 300 is disposed between the luminescent stacking layer 200 and the optical imaging module 120. The optical imaging module 120 can be attached to the luminescent pattern stacking layer 300, or formed thereon by a lithography process.

In this embodiment, the first patterned light-emitting layer 230 and the second patterned light-emitting layer 330 are, for example, organic light-emitting layers of organic light-emitting diodes, and the three-dimensional image data is written into an imaging sheet with a fixed pattern, and the imaging sheet reconstructs a light field image through the optical imaging module 120. The switchable floating image display device 100 of this embodiment may not use a display with pixels and a changeable screen, but uses the selective emission of at least one imaging sheet with a specific pattern to achieve the switching of the floating image. The switchable floating image display device 100 of this embodiment can have the advantages of simple structure and switchable floating images. In addition, the switchable floating image display device 100 of this embodiment does not require panel pixel-level process technology, and does not require a driver integrated circuit for driving pixels. In addition to reducing costs, the production of imaging chips is easier to customize according to field requirements. In addition, without using a panel with pixels, the volume of the switchable floating image display device 100 of this embodiment can be smaller.

In this embodiment, the switchable floating image display device 100 may further include a substrate 140. When manufacturing the switchable floating image display device 100 of this embodiment, the luminescent stack layer 200, the transparent barrier layer 110 and the luminescent pattern stack layer 300 may be formed on the substrate 140 by, for example, a lithography process. The transparent barrier layer 110 may also have a gas barrier effect to prevent the luminescent stack layer 200 from being damaged during the lithography process of the luminescent pattern stack layer 300. In addition, in this embodiment, the switchable floating image display device 100 may further include another transparent barrier layer 150 disposed between the light emitting pattern stacking layer 300 and the optical imaging module 120 to protect the light emitting pattern stacking layer 300. The substrate 140 may be made of glass or other appropriate materials.

Please refer to FIG. 1 and FIG. 4 again. The switchable floating image display device 100 of the present embodiment may further include a housing 160. The housing 160 may enclose the light emitting stack layer 200, the transparent barrier layer 110 and the light emitting pattern stack layer 300, and cover the side of the optical imaging module 120. In addition, the housing 160 may have an opening 162, exposing one side (e.g., the upper surface) of the optical imaging module 120 to allow the first pattern light beam 202 and the second pattern light beam 302 to pass through. In this way, the first floating image 203 and the second floating image 303 may be formed outside the housing 160, or formed at the opening 162. The housing 160 may further include a sensor, such as a proximity sensor or a distance sensor. As shown in FIG. 3A and FIG. 3B , when the sensor senses that the user's finger 50 is close to and located at the position of the first floating image 203, the processor inside the switchable floating image display device 100 can command the power supply module 130 to switch from the state of making the light-emitting stack layer 200 emit light to generate the first floating image 203 (as shown in FIG. 3A ) to the state of making the light-emitting pattern stack layer 300 emit light to generate the second floating image 303 (as shown in FIG. 3B ), wherein the first floating image 203 is, for example, a more protruding virtual key image that is not pressed, and the second floating image 303 is, for example, a less protruding virtual key image that is pressed. In this way, the user will visually feel that the virtual key image is transformed from a non-pressed and more protruding state (such as the first floating image 203 in FIG. 3A ) to a pressed and less protruding state (such as the second floating image 303 in FIG. 3B ) after being pressed by the finger. In this way, the switchable floating image display device 100 of this embodiment can achieve interaction between the floating image and the user. In other words, the switchable floating image display device 100 of this embodiment can realize non-contact interface technology, and the user does not need to actually touch the surface of the object, which can avoid the retention of body fluids, thereby destroying the indirect contact transmission pathway.

In this embodiment, the power supply module 130 may include a combination of logic circuits, gates, relays, switch elements, other electronic elements or combinations thereof. Referring again to FIG. 1 and FIG. 5 , when the switchable floating image display device 100 switches to the state where the light-emitting stack layer 200 emits light, the first switch element 132 in the power supply module 130 is turned on, and the second switch element 134 is turned off, so that a voltage difference is applied between the first electrode 210 and the second electrode 220, but no voltage difference is applied between the third electrode 310 and the fourth electrode 320. At this time, the light-emitting stack layer 200 emits light to generate a first floating image, while the light-emitting pattern stack layer 300 does not emit light. When the switchable floating image display device 100 switches to the state where the luminescent pattern stacking layer 300 emits light, the first switch element 132 in the power supply module 130 is disconnected, and the second switch element 134 is turned on, so that a voltage difference is applied between the third electrode 310 and the fourth electrode 320, but no voltage difference is applied between the first electrode 210 and the second electrode 220. At this time, the luminescent pattern stacking layer 300 emits light to generate a second floating image, while the luminescent stacking layer 200 does not emit light.

In this embodiment, the light emitting stacking layer 200 and the light emitting pattern stacking layer 300 form two light emitting patterns, but the present invention is not limited thereto. In other embodiments, the switchable floating image display device 100 may have 2, 3, 4 or 5 or more light emitting pattern stacking layers with different patterns, which are stacked together with the light emitting stacking layer 200 to form three or more light emitting patterns, so as to form three or more different floating images.

FIG6 is a cross-sectional schematic diagram of the detailed structure of another embodiment of the switchable floating image display device of the present invention. Referring to FIG6, the switchable floating image display device 100a of this embodiment is similar to the switchable floating image display device 100 of FIG5, and in the light-emitting pattern stacking layer 300a of this embodiment, the third electrode 310a is a transparent electrode, and the fourth electrode 320a is a reflective mirror layer. The material of the third electrode 310a is, for example, indium tin oxide or other transparent conductive materials, and the material of the fourth electrode 320a is, for example, metal. The light-emitting layer 330a is disposed between the third electrode 310a and the fourth electrode 320a, and is, for example, an organic light-emitting layer that is coated on the entire surface without a patterned organic light-emitting diode. In this embodiment, the light-emitting pattern stacking layer 300a further includes a patterned light-shielding layer 350 that covers a portion of the surface of the third electrode 310a, wherein the light emitted by the light-emitting layer 330a penetrates the portion of the third electrode 310a that is not shielded by the patterned light-shielding layer 350 to form a second patterned light beam 302. In this embodiment, the light emitted upward from the light-emitting layer 330a will be reflected downward by the fourth electrode 320a, and the light-emitting layer 330a will also emit light downward, and the light reflected and emitted downward will become the second patterned light beam 302 transmitted downward after passing through the portion of the third electrode 310a that is not shielded by the patterned light shielding layer 350. In this embodiment, the patterned light shielding layer 350 is a patterned metal layer. However, in other embodiments, the patterned light shielding layer 350 can also be a patterned insulating layer.

In the present embodiment, the light-emitting stack layer 200 is disposed between the light-emitting pattern stack layer 300a and the optical imaging module 120, and the substrate 140 is, for example, a transparent substrate. After the second pattern light beam 302 transmitted downward penetrates the transparent barrier layer 110, the light-emitting stack layer 200, the substrate 140 and the optical imaging module 120, a second floating image is formed below the optical imaging module 120. On the other hand, after the first pattern light beam 202 emitted by the first patterned light-emitting layer 230 penetrates the first electrode 210, the substrate 140 and the optical imaging module 120, a first floating image is formed below the optical imaging module 120. In the present embodiment, the first electrode 210 and the second electrode 220 can be transparent electrodes.

FIG7 is a cross-sectional schematic diagram of the detailed structure of a switchable floating image display device of another embodiment of the present invention. Referring to FIG7 , the switchable floating image display device 100b of this embodiment is similar to the switchable floating image display device 100a of FIG6 , and the luminous pattern stacking layer 300b of this embodiment may include a pattern definition layer 360, covering a portion of the surface of the third electrode 310b facing the luminous layer 330a, wherein the pattern definition layer 360 is an insulating layer, which may be a transparent insulating layer or an opaque insulating layer. The third electrode 310b includes a patterned electrode portion 312 and a conductive portion 314. The pattern of the patterned electrode portion 312 can be defined by a pattern definition layer 360, that is, the pattern of the patterned electrode portion 312 and the pattern of the pattern definition layer 360 can be two complementary patterns, wherein the shape and configuration of the pattern definition layer 360 can be adjusted as required. The patterned electrode portion 312 and the pattern definition layer 360 are configured on the surface of the conductive portion 314 facing the light-emitting layer 330a.

The portion of the light-emitting layer 330a above the pattern definition layer 360 does not emit light due to lack of conducting current, and the remaining portion of the light-emitting layer 330a (i.e., the portion above the patterned electrode portion 312) emits a second patterned light beam 302 that penetrates the third electrode 310b because a voltage difference is applied between the third electrode 310b and the fourth electrode 320a. The second patterned light beam 302 then penetrates the transparent barrier layer 110, the light-emitting stack layer 200, the substrate 140, and the optical imaging module 120, and forms a second floating image below the optical imaging module 120. In this embodiment, the material of the patterned electrode portion 312 and the conductive portion 314 is, for example, indium tin oxide or other transparent conductive materials.

In another embodiment, the light-emitting pattern stacking layer 300b may include a patterned third electrode 310b (i.e., the patterned electrode portion 312), and the portion of the light-emitting layer 330a corresponding to the patterned electrode portion 312 above the portion has current conduction when a voltage difference is applied between the patterned third electrode 310b and the fourth electrode 320a, thereby emitting a second pattern light beam 302 that penetrates the patterned third electrode 310b, and after continuous penetration, forms a second floating image below the optical imaging module 120.

FIG8 is a cross-sectional schematic diagram of the detailed structure of a switchable floating image display device of another embodiment of the present invention. Referring to FIG8 , the switchable floating image display device 100c of this embodiment is similar to the switchable floating image display device 100 of FIG5 , and the switchable floating image display device 100c of this embodiment further includes a substrate 170, another transparent barrier layer 150 and a bonding layer 180. The substrate 170 is disposed between the luminescent pattern stacking layer 300c and the optical imaging module 120, wherein the substrate 170 is, for example, a transparent substrate. The transparent barrier layer 150 is disposed between the luminescent pattern stacking layer 300c and the transparent barrier layer 110, wherein the transparent barrier layer 150 is, for example, a transparent insulating layer. The bonding layer 180 bonds the transparent barrier layer 110 and the transparent barrier layer 150 .

In this embodiment, the third electrode 310c is disposed between the fourth electrode 320c and the optical imaging module 120, and the second patterned light-emitting layer 330c is disposed between the third electrode 310c and the fourth electrode 320c. The second pattern definition layer 340c is disposed between the third electrode 310c and the fourth electrode 320c, and is used to define the pattern of the second patterned light-emitting layer 330c. In addition, the transparent barrier layer 150 is disposed between the bonding layer 180 and the fourth electrode 320c. In this embodiment, the third electrode 310c and the fourth electrode 320c can both be transparent electrodes, and their materials are, for example, indium tin oxide or other appropriate transparent conductive materials. Therefore, the third electrode 310c and the fourth electrode 320c can allow the first pattern light beam 202 and the second pattern light beam 302 to pass through.

When manufacturing the switchable floating image display device 100c, the light emitting stacking layer 200 and the light emitting stacking layer 300c can be formed on the substrate 140 and the substrate 170 respectively by lithography process, and the transparent barrier layer 110 and the transparent barrier layer 150 are formed on the light emitting stacking layer 200 and the light emitting stacking layer 300c respectively. Then, the light emitting stacking layer 300c together with the substrate 170 and the transparent barrier layer 150 are inverted on the light emitting stacking layer 200, and the transparent barrier layer 110 and the transparent barrier layer 150 are bonded by the bonding layer 180. In this embodiment, the bonding layer 180 can be a transparent adhesive layer, such as an optical clear adhesive (OCA). According to this manufacturing method, when the light emitting stacking layer 300c is manufactured by a lithography process, the light emitting stacking layer 200 will not be affected.

FIG9 is a cross-sectional schematic diagram of the detailed structure of another embodiment of the switchable floating image display device of the present invention. Referring to FIG9 , the switchable floating image display device 100d of the present embodiment is similar to the switchable floating image display device 100 of FIG5 , and the light-emitting stack layer 200d of the present embodiment may include a first electrode 210d, a second electrode 220, and a first light-emitting layer 230d, wherein the first light-emitting layer 230d is disposed between the first electrode 210d and the second electrode 220. In the present embodiment, the first electrode 210d, the second electrode 220, and the first light-emitting layer 230d are all distributed on the entire surface without being patterned, and can be regarded as a surface light source.

The light-emitting pattern stacking layer 300d includes a third electrode 310d, a pattern definition layer 360, a fourth electrode 320d and a second light-emitting layer 330d. The third electrode 310d includes a transparent conductive layer 314d and a patterned metal electrode layer 312d, and the patterned metal electrode layer 312d is disposed on the transparent conductive layer 314d. The pattern definition layer 360 is disposed on the transparent conductive layer 314d and is used to define the pattern of the patterned metal electrode layer 312d. The pattern of the pattern definition layer 360 and the pattern of the patterned metal electrode layer 312d are, for example, two complementary patterns. The pattern definition layer 360 may be a transparent insulating layer, and the light emitted by the first light emitting layer 230d is shielded by the patterned metal electrode layer 312d and penetrates the pattern definition layer 360 to form the first pattern light beam 202. The second light emitting layer 330d is disposed between the third electrode 310d and the fourth electrode 320d, wherein the portion of the second light emitting layer 330d on the pattern definition layer 360 does not emit light due to the insulating effect of the pattern definition layer 360, and the portion of the second light emitting layer 330d on the patterned metal electrode layer 312d emits the second pattern light beam 302 due to the voltage difference between the patterned metal electrode layer 312d and the fourth electrode 320d.

In another embodiment, the light-emitting pattern stack layer 300d may include a patterned third electrode 310d (i.e., a patterned metal electrode layer 312d), and a portion of the light-emitting layer 330d corresponding to the patterned metal electrode layer 312d above the patterned metal electrode layer 312d conducts current when a voltage difference is applied between the patterned third electrode 310d and the fourth electrode 320d, thereby emitting a second pattern light beam 302 that penetrates the fourth electrode 320d and forms a second floating image after penetrating the optical imaging module 120.

In this embodiment, the second light-emitting layer 330d is a film layer distributed over the entire surface without being patterned, but only the portion above the patterned metal electrode layer 312d emits light to form a light-emitting pattern. On the other hand, the light emitted by the first light-emitting layer 230d passes through the transparent conductive layer 314d and the pattern definition layer 360 in sequence to form another light-emitting pattern. Therefore, the light-emitting pattern formed by the first light-emitting layer 230d and the light-emitting pattern formed by the second light-emitting layer 330d can be complementary patterns to each other. When the first pattern light beam 202 and the second pattern light beam 302 pass through the optical imaging module 120, a complementary first floating image and a second floating image are formed.

In the switchable floating image display device 100d of this embodiment, the first light emitting layer 230d and the second light emitting layer 330d do not need to be patterned, which is helpful to simplify the manufacturing process and reduce the manufacturing cost.

FIG10 is a cross-sectional schematic diagram of the detailed structure of a switchable floating image display device of another embodiment of the present invention. Referring to FIG10 , the switchable floating image display device 100e of this embodiment is similar to the switchable floating image display device 100d of FIG9 , and the light-emitting pattern stacking layer 300e of this embodiment includes a transparent insulating layer 370 and a plurality of micro-light-emitting diodes 380 (micro-LEDs). These micro-light-emitting diodes 380 can be embedded in the transparent insulating layer 370, arranged in a pattern, and used to emit a second pattern light beam 302. That is, the semiconductor stacking layer and metal electrodes of these micro-LEDs 380 are provided in the transparent insulating layer 370. On the other hand, the light emitted by the first light-emitting layer 230d is blocked by these micro-LEDs 380 (for example, blocked by the metal electrodes of the micro-LEDs 380), and penetrates the area of the transparent insulating layer 370 without these micro-LEDs 380 to form the first pattern light beam 202. That is to say, the luminous pattern of the first pattern light beam 202 (i.e., the area without these micro-LEDs 380 in the corresponding transparent insulating layer 370) and the luminous pattern of the second pattern light beam 302 (i.e., the pattern formed by the micro-LEDs 380) can be complementary, so the first floating image formed by the first pattern light beam 202 and the second floating image formed by the second pattern light beam 302 can also present two complementary images.

FIG11 is a cross-sectional schematic diagram of the detailed structure of another embodiment of the switchable floating image display device of the present invention. Referring to FIG11 , the switchable floating image display device 100f of this embodiment is similar to the switchable floating image display device 100e of FIG10 , and the switchable floating image display device 100f of this embodiment further includes a substrate 170 and a bonding layer 180, wherein the substrate 170 is disposed between the transparent barrier layer 110 and the light-emitting pattern stacking layer 300e, and the bonding layer 180 bonds the transparent barrier layer 110 and the substrate 170. In this embodiment, the light emitting stack layer 200d and the light emitting pattern stack layer 300e can be formed on the substrate 140 and the substrate 170 respectively, and then the two are bonded together via a bonding layer 180.

FIG12A is a simplified schematic diagram of a light emitting stacking layer of a switchable floating image display device according to another embodiment of the present invention when emitting light, and FIG12B is a simplified schematic diagram of a light emitting pattern stacking layer of the switchable floating image display device of FIG12A when emitting light. Referring to FIG12A and FIG12B, the switchable floating image display device 100g of the present embodiment is similar to the switchable floating image display device 100 of FIG1, FIG2A and FIG2B, and in the present embodiment, one of the first floating image 203g and the second floating image 303g can be a planar image, and the other of the first floating image 203g and the second floating image 303g can be a stereoscopic image (in FIG12A and FIG12B, the first floating image 203g is a stereoscopic image, and the second floating image 303g is a planar image). In FIG. 12A , the luminescent stacking layer 200 can be designed to generate a luminescent pattern 201, which can generate a three-dimensional first floating image 203g (light field imaging pattern) in combination with the optical imaging module 120. In FIG. 12B , the luminescent pattern stacking layer 300 can be designed to generate a planar pattern (i.e., the luminescent pattern 301), which can generate a planar second floating image 303g in combination with the optical imaging module 120. Therefore, the switchable floating image display device 100g of this embodiment can achieve switching between a two-dimensional image (i.e., the second floating image 303g) and a three-dimensional image (the first floating image 203g).

FIG13 is a cross-sectional schematic diagram of a switchable floating image display device of another embodiment of the present invention. Referring to FIG13 , the switchable floating image display device 100h of the present embodiment is similar to the switchable floating image display device 100 of FIG5 , and the light-emitting stacking layer 200h of the present embodiment may include a backlight source 230h and a patterned light-shielding layer 240h, and the patterned light-shielding layer 240h is disposed between the backlight source 230h and the light-emitting pattern stacking layer 300. The patterned light-shielding layer 240h allows part of the light emitted by the backlight source 230h to pass through, and shields another part of the light emitted by the backlight source 230h to form a first patterned light beam 202, and the first patterned light beam 202 penetrates the light-emitting pattern stacking layer 300 to form a first floating image.

In this embodiment, the light-emitting stacking layer 200h may further include a transparent substrate 250h, which is disposed between the backlight source 230h and the patterned light-shielding layer 240h. The transparent substrate 250h allows the light emitted by the backlight source 230h to pass through and reach the patterned light-shielding layer 240h. The patterned light-shielding layer 240h may be a patterned metal layer or a patterned non-metallic shielding layer. The backlight source 230h is a light source, which may include a light-emitting diode, a flat panel lamp, a micro light-emitting diode array or an organic light-emitting diode. In addition, in other embodiments, more floating images may be formed by stacking more than two light-emitting pattern stacking layers 300.

In summary, in the switchable floating image display device of an embodiment of the present invention, a light emitting stack layer and a light emitting pattern stack layer are used to generate a first pattern light beam and a second pattern light beam respectively, the optical imaging module makes the first pattern light beam form a first floating image, and makes the second pattern light beam form a second floating image, and the power supply module determines the generation of the first floating image or the second floating image by switching the light emitting stack layer or the light emitting pattern stack layer to emit light. Therefore, the switchable floating image display device of an embodiment of the present invention can have the advantages of simple structure and switchable floating images.

50: finger 100, 100a, 100b, 100c, 100d, 100e, 100f, 100g, 100h: switchable floating image display device 110, 150: transparent barrier layer 120: optical imaging module 122: micro lens 130: power supply module 132: first switch element 134: second switch element 140, 170: substrate 160: housing 162: opening 180: bonding layer 200, 200d, 200h: luminescent stacking layer 201, 301: luminescent pattern 202: first pattern light beam 203, 203g: first floating image 210, 210d: first electrode 220: second electrode 230: first patterned light-emitting layer 230d: first light-emitting layer 230h: backlight source 240: first pattern definition layer 240h: patterned light-shielding layer 250h: transparent substrate 300, 300a, 300b, 300c, 300d, 300e: light-emitting pattern stacking layer 302: second pattern light beam 303, 303g: second floating image 310, 310a, 310b, 310c, 310d: third electrode 312: patterned electrode portion 312d: patterned metal electrode layer 314: conductive portion 314d: transparent conductive layer 320, 320a, 320c, 320d: fourth electrode 330, 330c: second patterned light-emitting layer 330a: light-emitting layer 330d: second light-emitting layer 340, 340c: second pattern definition layer 350: patterned light-shielding layer 360: pattern definition layer 370: transparent insulating layer 380: micro-luminescent diode

FIG. 1 is a simplified schematic diagram of a switchable floating image display device of an embodiment of the present invention. FIG. 2A is a simplified schematic diagram of the light-emitting stacking layer of FIG. 1 when emitting light. FIG. 2B is a simplified schematic diagram of the light-emitting pattern stacking layer of FIG. 1 when emitting light. FIG. 3A is a schematic diagram of a first floating image and a user's finger provided by the light-emitting stacking layer when emitting light. FIG. 3B is a schematic diagram of a second floating image and a user's finger provided by the light-emitting pattern stacking layer when emitting light. FIG. 4 is a three-dimensional schematic diagram showing a possible appearance of the switchable floating image display device of FIG. 1 and one of the floating images formed by it. FIG. 5 is a cross-sectional schematic diagram of the detailed structure of the switchable floating image display device of FIG. 1. FIG. 6 is a cross-sectional schematic diagram of the detailed structure of a switchable floating image display device of another embodiment of the present invention. FIG. 7 is a cross-sectional schematic diagram of the detailed structure of a switchable floating image display device of another embodiment of the present invention. FIG. 8 is a cross-sectional schematic diagram of the detailed structure of a switchable floating image display device of another embodiment of the present invention. FIG. 9 is a cross-sectional schematic diagram of the detailed structure of a switchable floating image display device of another embodiment of the present invention. FIG. 10 is a cross-sectional schematic diagram of the detailed structure of a switchable floating image display device of another embodiment of the present invention. FIG. 11 is a cross-sectional schematic diagram of the detailed structure of a switchable floating image display device of another embodiment of the present invention. FIG. 12A is a simplified schematic diagram of a light-emitting stacking layer of a switchable floating image display device according to another embodiment of the present invention when emitting light. FIG. 12B is a simplified schematic diagram of a light-emitting pattern stacking layer of a switchable floating image display device according to FIG. 12A when emitting light. FIG. 13 is a cross-sectional schematic diagram of a switchable floating image display device according to another embodiment of the present invention.

100: Switchable floating image display device

110: Transparent barrier layer

120: Optical imaging module

122: Micro lens

130: Power supply module

132: First switch element

134: Second switch element

200: Luminous stacking layer

202: The first pattern beam

300: Glowing pattern stacking layer

302: Second pattern beam

Claims (16)

A switchable floating image display device includes: a light emitting stacking layer for generating a first pattern light beam; a light emitting pattern stacking layer for generating a second pattern light beam; a transparent blocking layer disposed between the light emitting stacking layer and the light emitting pattern stacking layer to block the electrical connection between the light emitting stacking layer and the light emitting pattern stacking layer; an optical imaging module for making the first pattern light beam A first floating image is formed, and the second pattern light beam is used to form a second floating image; and a power supply module is electrically connected to the light emitting stack layer and the light emitting pattern stack layer, and is used to determine the generation of the first floating image or the second floating image by switching the light emitting stack layer or the light emitting pattern stack layer to emit light, wherein the first floating image and the second floating image are light field images. The switchable floating image display device as described in claim 1, wherein the light-emitting stacking layer comprises: a first electrode; a second electrode; and a first patterned light-emitting layer, which is disposed between the first electrode and the second electrode and used to form the first patterned light beam, and the light-emitting patterned stacking layer comprises: a third electrode; a fourth electrode; and a second patterned light-emitting layer, which is disposed between the third electrode and the fourth electrode and used to form the second patterned light beam, wherein the second electrode, the third electrode and the fourth electrode are transparent electrodes. The switchable floating image display device as described in claim 2, wherein the light-emitting stacking layer further includes a first pattern definition layer for defining the pattern of the first patterned light-emitting layer and the first electrode, and the light-emitting pattern stacking layer further includes a second pattern definition layer, which is disposed between the third electrode and the fourth electrode and is used to define the pattern of the second patterned light-emitting layer. The switchable floating image display device as described in claim 1, wherein the light-emitting stacking layer comprises: a first electrode; a second electrode; and a first patterned light-emitting layer disposed between the first electrode and the second electrode and used to form the first patterned light beam, and the light-emitting patterned stacking layer comprises: a third electrode, which is a transparent electrode; a fourth electrode, which is a reflective mirror layer; a light-emitting layer, which is disposed between the third electrode and the fourth electrode; and a patterned light-shielding layer, which covers a portion of the surface of the third electrode, wherein the light emitted by the light-emitting layer penetrates the portion of the third electrode not shielded by the patterned light-shielding layer to form the second patterned light beam. A switchable floating image display device as described in claim 4, wherein the patterned light shielding layer is a patterned metal layer. The switchable floating image display device as described in claim 1, wherein the light emitting stacking layer comprises: a first electrode; a second electrode; and a first patterned light emitting layer, which is disposed between the first electrode and the second electrode and is used to form the first patterned light beam, and the light emitting patterned stacking layer comprises: a third electrode, which is a transparent electrode; a fourth electrode, which is A reflective mirror layer; a light-emitting layer disposed between the third electrode and the fourth electrode; and a pattern definition layer covering a portion of the surface of the third electrode facing the light-emitting layer, wherein the pattern definition layer is an insulating layer, the portion of the light-emitting layer above the pattern definition layer does not emit light, and the remaining portion of the light-emitting layer emits the second pattern light beam that penetrates the third electrode. The switchable floating image display device as described in claim 1 further comprises: a first substrate, wherein the light-emitting stacking layer is arranged on the first substrate; a second substrate, arranged between the light-emitting pattern stacking layer and the optical imaging module; another transparent barrier layer, arranged between the light-emitting pattern stacking layer and the transparent barrier layer; and a bonding layer, bonding the transparent barrier layer and the other transparent barrier layer. The switchable floating image display device as described in claim 1, wherein the light-emitting stacking layer comprises: a first electrode; a second electrode; and a first light-emitting layer disposed between the first electrode and the second electrode, and the light-emitting pattern stacking layer comprises: a third electrode, comprising: a transparent conductive layer; and a patterned metal electrode layer disposed on the transparent conductive layer; a pattern definition layer disposed on the transparent conductive layer and used to define the patterned metal electrode layer. The invention relates to a first light-emitting layer having a pattern, wherein the pattern definition layer is a transparent insulating layer, the light emitted by the first light-emitting layer is shielded by the patterned metal electrode layer and penetrates the pattern definition layer to form the first pattern light beam; a fourth electrode; and a second light-emitting layer, which is disposed between the third electrode and the fourth electrode, wherein the portion of the second light-emitting layer on the pattern definition layer does not emit light, and the portion of the second light-emitting layer on the patterned metal electrode layer emits the second pattern light beam. The switchable floating image display device as described in claim 1, wherein the light-emitting stacking layer comprises: a first electrode; a second electrode; and a light-emitting layer disposed between the first electrode and the second electrode, The light-emitting pattern stacking layer comprises: a transparent insulating layer; and a plurality of micro-LEDs embedded in the transparent insulating layer, arranged in a pattern, and used to emit the second pattern light beam, wherein the light emitted by the light-emitting layer is blocked by the micro-LEDs and penetrates the area of the transparent insulating layer without the micro-LEDs to form the first pattern light beam. The switchable floating image display device as described in claim 1 further comprises: a first substrate, wherein the light-emitting stacking layer is arranged on the first substrate; a second substrate, arranged between the transparent barrier layer and the light-emitting pattern stacking layer; and a bonding layer, bonding the transparent barrier layer and the second substrate. The switchable floating image display device as described in claim 1, wherein the light-emitting pattern stacking layer is disposed between the light-emitting stacking layer and the optical imaging module. The switchable floating image display device as described in claim 1, wherein the light-emitting stacking layer is disposed between the light-emitting pattern stacking layer and the optical imaging module. A switchable floating image display device as described in claim 1, wherein the optical imaging module includes a lens array, a grating, a photonic crystal or an optical fiber. A switchable floating image display device as described in claim 1, wherein the first floating image and the second floating image have different shapes, distribution ranges, colors, brightness or a combination thereof. A switchable floating image display device as described in claim 1, wherein one of the first floating image and the second floating image is a two-dimensional image, and the other of the first floating image and the second floating image is a three-dimensional image. The switchable floating image display device as described in claim 1, wherein the light-emitting stacking layer comprises: a backlight source; and a patterned light-shielding layer disposed between the backlight source and the light-emitting patterned stacking layer, wherein the patterned light-shielding layer allows a portion of the light emitted by the backlight source to pass through and shields another portion of the light emitted by the backlight source to form the first patterned light beam.

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