A 3D naked eye display device for vending machines

Abstract

The present invention discloses a 3D naked-eye display device for use in a vending machine, relating to the technical field of 3D naked-eye display devices. The device comprises a vending machine, wherein a first glass substrate and a second glass substrate are disposed on the front side of the vending machine, a liquid crystal layer is disposed between the first and second glass substrates, and an ITO vertical wall and an ITO horizontal electrode are disposed on the side of the first glass substrate adjacent to the second glass substrate; the first glass substrate is also provided with a plurality of V-shaped grooves. The advantages of the device are that, through design and connection, a display system is formed that integrates precise electric field control, ambient light adaptation, and 3D field of view expansion. This not only solves the problems of electric field crosstalk and limited viewing angle in traditional 3D displays, but also reduces energy consumption through intelligent adjustment, improves the practicality and reliability of the device in commercial scenarios, and provides the vending machine with a more attractive product display effect.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D naked-eye display devices, and in particular to a 3D naked-eye display device for a vending machine. Background Art

[0002] The 3D naked-eye display device on the vending machine is mainly used to display products with a stereoscopic visual effect. Compared with 2D images, it is easier to attract consumers' attention. Stereoscopic display can increase product attention and promote purchasing decisions. It can present images with a sense of depth without the user wearing special glasses.

[0003] In terms of ambient light adaptability, if the device cannot adjust according to the light intensity, the glass surface will easily produce reflections under strong light, resulting in blurred 3D images and reduced contrast. In low light, it may cause dizziness due to excessive brightness, making the display unstable, affecting the user's viewing experience and the product display effect. The electric field crosstalk problem will cause the electric fields of adjacent liquid crystal partitions to interfere with each other, resulting in 3D image ghosting, positional offset, and reduced three-dimensional effect. In severe cases, it can even cause image distortion and inability to accurately present product details. These two problems not only reduce the clarity and realism of the 3D display, but also limit the device's usage scenarios, making it difficult to work normally in strong outdoor light or complex lighting environments. At the same time, it affects the user's perception of the product, thereby weakening the product appeal and marketing effectiveness of the vending machine. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems of ambient light adaptability and electric field crosstalk in the prior art, and to propose a 3D naked-eye display device for a vending machine.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A 3D naked-eye display device for a vending machine includes a vending machine, wherein a first glass substrate and a second glass substrate are provided on the front side of the vending machine, a liquid crystal layer is provided between the first and second glass substrates, and an ITO vertical wall and an ITO horizontal electrode are provided on the side of the first glass substrate close to the second glass substrate; a plurality of V-shaped grooves are provided on the first glass substrate, each of the plurality of V-shaped grooves is filled with insulating glue, and the corresponding plurality of V-shaped grooves are aligned with the ITO vertical walls to block electric field crosstalk between adjacent partitions; a plurality of photoresistors and a plurality of swing blades are provided on the side of the second glass substrate close to the vending machine, and the photoresistors are used to detect ambient light intensity and control the swing blades to adjust the glass transmittance.

[0007] In the above-mentioned 3D naked-eye display device for a vending machine, the ITO vertical walls are formed on the first glass substrate through photolithography and etching processes, and the ITO horizontal electrodes cover the tops of the ITO vertical walls. The ITO vertical walls and the ITO horizontal electrodes form an orthogonal grid, dividing the liquid crystal layer into multiple independent partitions.

[0008] In the above-mentioned 3D naked-eye display device for vending machines, the orthogonal grid formed by the ITO vertical walls and ITO horizontal electrodes independently controls the voltage of each partition through a matrix drive method, which is used to change the molecular orientation of the liquid crystal layer and realize dynamic adjustment of the partition focal length.

[0009] In the above-mentioned 3D naked-eye display device for a vending machine, the V-groove is formed on the first glass substrate by a laser etching process, and the insulating glue is used to fill the V-groove and form an insulating barrier to prevent crosstalk between adjacent partitioned electric fields.

[0010] In the above-mentioned 3D naked-eye display device for a vending machine, a motor is fixedly installed in the vending machine, and the motor is electrically connected to multiple photoresistors. A rotating shaft is fixedly installed on the driving end of the motor. Multiple fixed blocks are fixedly installed on one side of the first glass substrate located in the vending machine. Rotating rods are rotatably set on the multiple fixed blocks, one of which is fixedly connected to one end of the rotating shaft. A belt transmission mechanism is set between the multiple rotating rods, and multiple swing blades are set on the corresponding rotating rods.

[0011] In the above-mentioned 3D naked-eye display device for a vending machine, the surfaces of the plurality of the pendulum blades are coated with a super-hydrophobic coating to reduce dust adhesion. The angle adjustment range of the pendulum blades is 0-90°, and the dynamic adjustment of the pendulum blades is achieved through the detection signal of the photoresistor.

[0012] In the above-mentioned 3D naked-eye display device for a vending machine, two OLED screen devices are further provided on the second glass substrate, a first thin-film encapsulation layer is closely attached to the second glass substrate, two metal vias are provided on the first thin-film encapsulation layer, the OLED screen device is connected to a connecting transparent metal sheet through the two metal vias, a first transparent electrode is commonly provided between the two connecting transparent metal sheets, silver nanowires are commonly installed between the first transparent electrode and the second glass substrate, a second transparent electrode coupled to the first transparent electrode is provided on the first transparent electrode, and a liquid crystal layer is distributed between the first transparent electrode and the second transparent electrode, the second transparent electrode is a transparent metal oxide electrode, the first thin-film encapsulation layer, the first transparent electrode, and the second transparent electrode are all in the form of thin films, the first transparent electrode is closely attached to the second glass substrate, and the second transparent electrode is closely attached to the first glass substrate, covering the entire effective display area.

[0013] In the above-mentioned 3D naked-eye display device for a vending machine, an elastic diaphragm is provided between the liquid crystal layer and the first glass substrate. The elastic diaphragm is used to adjust the thickness of the liquid crystal layer and cooperate with the ITO vertical walls and ITO horizontal electrodes to achieve zoned focal length adjustment.

[0014] In the above-mentioned 3D naked-eye display device for a vending machine, a frame glue is provided between the first glass substrate and the second glass substrate, and the frame glue is used to seal the liquid crystal layer.

[0015] In the above-mentioned 3D naked-eye display device for a vending machine, a plurality of microprisms are provided on the first glass substrate, and the plurality of microprisms are aligned with the plurality of ITO vertical wall partitions to direct the outgoing light to different viewing angle areas.

[0016] Compared with existing technologies, the advantages of the present invention are: through design and connection, a display system is formed that integrates precise electric field control, ambient light adaptation, and 3D field of view expansion. It not only solves the problems of electric field crosstalk and limited viewing angle in traditional 3D displays, but also reduces energy consumption through intelligent adjustment, improves the practicality and reliability of the equipment in commercial scenarios, and provides vending machines with a more attractive product display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a 3D naked-eye display device for a vending machine proposed by the present invention;

[0018] Figure 2 Schematic diagram of the internal structure of the vending machine 1 of the present invention;

[0019] Figure 3 For the present invention Figure 2 A schematic diagram of the structure of part a is enlarged;

[0020] Figure 4 For the present invention Figure 2 A schematic diagram of the structure of part b is enlarged;

[0021] Figure 5 is a top view of the first glass substrate and the second glass substrate in the present invention;

[0022] Figure 6 For the present invention Figure 5 Structural cross-sectional view along the AA direction;

[0023] Figure 7 For the present invention Figure 5 Schematic diagram of the decomposition structure;

[0024] Figure 8 For the present invention Figure 7Schematic diagram of the enlarged structure of part c.

[0025] In the figure: 1. Vending machine; 2. First glass substrate; 3. Rotating shaft; 4. Swing blade; 5. Rotating rod; 6. Fixed block; 7. Second glass substrate; 8. Frame glue; 9. Photoresistor; 10. OLED screen device; 11. First thin film encapsulation layer; 12. Silver nanowires; 13. Connecting transparent metal sheet; 14. First transparent electrode; 15. Liquid crystal layer; 16. Second transparent electrode; 17. ITO horizontal electrode; 18. ITO vertical wall; 19. Elastic diaphragm; 20. Insulating glue; 21. V-groove. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Reference Figures 1-8 A 3D naked-eye display device for a vending machine includes a vending machine 1. A first glass substrate 2 and a second glass substrate 7 are provided on the front side of the vending machine 1. A liquid crystal layer 15 is provided between the first glass substrate 2 and the second glass substrate 7. A frame glue 8 is provided between the first glass substrate 2 and the second glass substrate 7. The frame glue 8 is used to seal the liquid crystal layer 15. An ITO vertical wall 18 and an ITO horizontal electrode 17 are provided on the side of the first glass substrate 2 close to the second glass substrate 7. A plurality of microprisms are provided on the first glass substrate 2. The plurality of microprisms are aligned with the plurality of ITO vertical walls 18 in partitions to guide the outgoing light to different viewing angle areas, expand the visual range of the 3D display, allow multiple people to watch clearly from different angles, and improve the user experience. After the light is deflected by the microprism, it matches the focal length of the partition, expands the field of view, reduces the picture drift when the audience moves, and reduces the sense of dizziness.

[0028] ITO vertical walls 18 are formed on the first glass substrate 2 through photolithography and etching processes, with a height of 1-3 μm. ITO lateral electrodes 17 cover the tops of the ITO vertical walls 18. The ITO vertical walls 18 and the ITO lateral electrodes 17 form an orthogonal grid, dividing the liquid crystal layer 15 into multiple independent partitions. The multiple independent partitions can independently control the electrical signals in each area. By changing the orientation of the liquid crystal molecules in the liquid crystal layer 15, the focal length can be adjusted, allowing the display image to be dynamically adjusted according to demand. This solves the problem of traditional planar electrodes being unable to locally control light and enhances display flexibility. The orthogonal grid formed by the ITO vertical walls 18 and ITO lateral electrodes 17 uses a matrix drive method to independently control the voltage of each partition, which is used to change the molecular orientation of the liquid crystal layer 15 and achieve dynamic adjustment of the partition focal length.

[0029] A plurality of V-grooves 21 are provided on the first glass substrate 2, and insulating glue 20 is filled in each of the plurality of V-grooves 21. The V-grooves 21 are formed on the first glass substrate 2 by a laser etching process. The insulating glue 20 is used to fill the V-grooves 21 and form an insulating barrier. The V-grooves 21 and the insulating glue 20 form a physical barrier to block the mutual interference of the electric fields in adjacent areas, thereby avoiding the display ghosting phenomenon, making the 3D image clearer and more stable, and preventing the electric fields of adjacent partitions from crosstalking. The corresponding plurality of V-grooves 21 are aligned with the ITO vertical walls 18 to block the electric field crosstalk between adjacent partitions.

[0030] An OLED screen device 10 is also provided on the second glass substrate 7. The self-luminous characteristics of the OLED screen device 10 realize high-contrast display. A first thin-film encapsulation layer 11 is closely attached to the second glass substrate 7. The first thin-film encapsulation layer 11 protects the device from the influence of the external environment, prolongs the service life, and is suitable for long-term operation of the vending machine 1. Two metal vias are provided on the first thin-film encapsulation layer 11. The OLED screen device 10 is connected to a connecting transparent metal sheet 13 through the two metal vias. A first transparent electrode 14 is commonly provided between the two connecting transparent metal sheets 13. Silver nanowires 12 are commonly installed between the first transparent electrode 14 and the second glass substrate 7. The first transparent electrode 14 uses silver nanowires 12 as a conductive carrier. The silver nanowires 12 are evenly distributed on the surface of the second glass substrate 7 through processes such as spin coating, spraying or printing, and then cured by heat treatment or chemical cross-linking to form a transparent conductive film covering the entire display area (only for schematic purposes in the figure). A second transparent electrode 16 coupled to the first transparent electrode 14 is provided, and the liquid crystal layer 15 is distributed between the first transparent electrode 14 and the second transparent electrode 16. The second transparent electrode 16 is a transparent metal oxide electrode. The first thin-film encapsulation layer 11, the first transparent electrode 14, and the second transparent electrode 16 are all in the form of thin films. The first transparent electrode 14 is closely attached to the second glass substrate 7, and the second transparent electrode 16 is closely attached to the first glass substrate 2, covering the entire effective display area.

[0031] An elastic diaphragm 19 is provided between the liquid crystal layer 15 and the first glass substrate 2. The elastic diaphragm 19 is used to adjust the thickness of the liquid crystal layer 15 and cooperate with the ITO vertical wall 18 and the ITO horizontal electrode 17 to achieve partitioned focal length adjustment. The elastic diaphragm 19 cooperates with the ITO horizontal electrode 17 to adjust the focal length from both mechanical and electrical aspects, dynamically optimize the display effect according to the position of the personnel, enhance the 3D stereoscopic effect, and reduce energy consumption. The deformation signal of the elastic diaphragm 19 and the voltage signal of the ITO horizontal electrode 17 are transmitted through the single-chip microcomputer (the vending machine 1 is usually provided with an independent control module (such as the main board area) for integrating components such as the drive circuit and the sensor interface. The single-chip microcomputer is used for The core control unit (CCU) is installed here to facilitate connection to components such as infrared sensors and motor drive circuits, reducing wiring complexity. This collaborative control forms a closed-loop feedback system. An infrared sensor is installed within vending machine 1, and a micropush rod is installed between elastic diaphragm 19 and first glass substrate 2. This micropush rod is also controlled by a single-chip microcomputer. The infrared sensor detects the user's position, and the single-chip microcomputer calculates the required focal length. It controls the micropush rod to push elastic diaphragm 19, changing the thickness of liquid crystal layer 15, while simultaneously adjusting the voltage of corresponding zoned ITO lateral electrodes 17, achieving dual focal length adjustment. This method only activates adjustment when the user's position changes, reducing overall power consumption compared to traditional solutions. Silver nanowires 12 serve as the driving electrodes for OLED screen device 10. They transmit the voltage signal output by the single-chip microcomputer to liquid crystal layer 15, where they form an electric field in conjunction with second transparent electrodes 16, driving the orientation of liquid crystal molecules and achieving zoned focal length adjustment.

[0032] A plurality of photoresistors 9 and a plurality of swing blades 4 are provided on the side of the second glass substrate 7 close to the vending machine 1. The photoresistors 9 are used to detect the ambient light intensity to control the swing blades 4 to adjust the light transmittance of the glass. A motor is fixedly provided in the vending machine 1, and the motor is electrically connected to the plurality of photoresistors 9. A rotating shaft 3 is fixedly installed on the driving end of the motor. A plurality of fixed blocks 6 are fixedly provided on the side of the first glass substrate 2 located in the vending machine 1. Rotating rods 5 are rotatably provided on the plurality of fixed blocks 6. One of the rotating rods 5 is fixedly connected to one end of the rotating shaft 3. A belt transmission mechanism is provided between the plurality of rotating rods 5. The plurality of swing blades 4 are all provided on the corresponding rotating rods 5. The surfaces of the plurality of swing blades 4 are The vending machine 1 is coated with a super-hydrophobic coating to reduce dust adhesion. The angle adjustment range of the pendulum blade 4 is 0-90°. Dynamic adjustment of the pendulum blade 4 is achieved through the detection signal of the photoresistor 9. The photoresistor 9 senses the ambient light intensity in real time. The vending machine 1 is equipped with a PLC controller (existing technology, the details of which will not be elaborated in detail). The PLC controller is electrically connected to the photoresistor 9 and the motor. The motor adopts a servo motor. The photoresistor 9 receives light intensity and controls the motor rotation angle. The shaft 3 drives multiple rotating rods 5 to drive the pendulum blade 4 to adjust the angle, achieving light shading adjustment for the first glass substrate 2 and the second glass substrate 7, and automatically adjusting the glass transmittance. In strong light, the rotation angle increases, so that the shading formed by the pendulum blade 4 is increased and the reflection is reduced. In low light, the rotation angle decreases, increasing the brightness, making the displayed content clearly visible under different lighting conditions, making people more easily attracted by the 3D effect, while reducing dust adhesion and lowering maintenance requirements.

[0033] It is further explained that the above-mentioned fixed connection should be understood in a broad sense unless otherwise clearly specified and limited. For example, it can be welding, gluing, or one-piece molding, etc., which are common means well known to those skilled in the art.

[0034] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A 3D naked eye display device for a vending machine, comprising a vending machine (1), characterized in that: The vending machine (1) is provided with a first glass substrate (2) and a second glass substrate (7) on the front side, a liquid crystal layer (15) is provided between the first glass substrate (2) and the second glass substrate (7), and an ITO vertical wall (18) and an ITO horizontal electrode (17) are provided on the side of the first glass substrate (2) close to the second glass substrate (7); a plurality of V-shaped grooves (21) are provided on the first glass substrate (2), and the plurality of V-shaped grooves (21) are filled with insulating glue (20), and the corresponding plurality of V-shaped grooves (21) are aligned with the ITO vertical wall (18) to block the electric field crosstalk between adjacent partitions; a plurality of photoresistors (9) and a plurality of swing blades (4) are provided on the side of the second glass substrate (7) close to the vending machine (1), and the photoresistors (9) are used to detect the ambient light intensity and control the swing blades (4) to adjust the glass transmittance; The ITO vertical walls (18) are formed on the first glass substrate (2) by photolithography and etching processes, and the ITO transverse electrodes (17) cover the tops of the ITO vertical walls (18). The ITO vertical walls (18) and the ITO transverse electrodes (17) form an orthogonal grid, dividing the liquid crystal layer (15) into a plurality of independent partitions. The orthogonal grid formed by the ITO vertical walls (18) and the ITO horizontal electrodes (17) independently controls the voltage of each partition through a matrix driving method, so as to change the molecular orientation of the liquid crystal layer (15) and realize dynamic adjustment of the focal length of each partition; Two OLED screen devices (10) are also provided on the second glass substrate (7); a first thin film encapsulation layer (11) is closely attached to the second glass substrate (7); two metal vias are provided on the first thin film encapsulation layer (11); the OLED screen device (10) is connected to a connecting transparent metal sheet (13) through the two metal vias; a first transparent electrode (14) is commonly provided between the two connecting transparent metal sheets (13); silver nanowires (12) are commonly installed between the first transparent electrode (14) and the second glass substrate (7); a second transparent electrode (16) coupled to the first transparent electrode (14) is provided on the first transparent electrode (14); a liquid crystal layer (15) is distributed between the first transparent electrode (14) and the second transparent electrode (16); the second transparent electrode (16) is a transparent metal oxide electrode; the first thin film encapsulation layer (11), the first transparent electrode (14), and the second transparent electrode (16) are all in thin film form; the first transparent electrode (14) is closely attached to the second glass substrate (7); and the second transparent electrode (16) is closely attached to the first glass substrate (2), covering the entire effective display area; An elastic diaphragm (19) is provided between the liquid crystal layer (15) and the first glass substrate (2); the elastic diaphragm (19) is used to adjust the thickness of the liquid crystal layer (15), and cooperates with the ITO vertical wall (18) and the ITO horizontal electrode (17) to achieve zoned focal length adjustment.

2. The 3D naked eye display device for a vending machine according to claim 1, characterized in that: The V-shaped groove (21) is formed on the first glass substrate (2) by a laser etching process, and the insulating glue (20) is used to fill the V-shaped groove (21) and form an insulating barrier to prevent crosstalk between adjacent partitioned electric fields.

3. The 3D naked eye display device for a vending machine according to claim 1, characterized in that: A motor is fixedly installed in the vending machine (1), and the motor is electrically connected to a plurality of photoresistors (9). A rotating shaft (3) is fixedly installed on the driving end of the motor. A plurality of fixed blocks (6) are fixedly installed on one side of the first glass substrate (2) located in the vending machine (1). Rotating rods (5) are rotatably installed on the plurality of fixed blocks (6). One of the rotating rods (5) is fixedly connected to one end of the rotating shaft (3). A belt transmission mechanism is provided between the plurality of rotating rods (5), and a plurality of swing blades (4) are provided on the corresponding rotating rods (5).

4. The 3D naked eye display device for a vending machine according to claim 3, characterized in that: The surfaces of the plurality of pendulum blades (4) are coated with a super-hydrophobic coating to reduce dust adhesion. The angle adjustment range of the pendulum blades (4) is 0-90°, and the dynamic adjustment of the pendulum blades (4) is achieved through the detection signal of the photoresistor (9).

5. The 3D naked eye display device for a vending machine according to claim 1, characterized in that: A sealant (8) is provided between the first glass substrate (2) and the second glass substrate (7), and the sealant (8) is used to seal the liquid crystal layer (15).

6. The 3D naked eye display device for a vending machine according to claim 1, characterized in that: A plurality of microprisms are provided on the first glass substrate (2), and the plurality of microprisms are aligned with the plurality of ITO vertical walls (18) in sections, so as to direct the emitted light to different viewing angle areas.

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