Optical transparent WLAN antenna integrated in OLED

Abstract

The utility model discloses an optical transparent WLAN antenna integrated in an OLED, which comprises an OLED chip and an antenna, the OLED chip comprises a metal substrate, a packaging layer, a metal cathode, an electron emission layer, an ITO anode and a glass dielectric layer which are stacked in sequence along the vertical direction, the antenna comprises an antenna substrate and an ITO grid layer arranged on the antenna substrate, and the metal cathode, the electron emission layer, the ITO anode and the glass dielectric layer are stacked in sequence along the vertical direction. The side, away from the ITO grid layer, of the antenna substrate is attached to the side, away from the ITO anode, of the glass dielectric layer. The antenna is integrated on the OLED chip, and the antenna is arranged in the light emission direction of the OLED chip, so that the attenuation of the light transparency of the OLED layer is reduced to the greatest extent. The antenna adopts an ITO (Indium Tin Oxide) grid structure with good conductivity and optical transparency, so that the wireless transmission performance of the antenna is considered, the optical transparency is increased to the maximum extent, and the application of the antenna in a high-light-transmittance environment is effectively realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of antenna, especially to a kind of optical transparent WLAN antenna integrated in OLED. BACKGROUND

[0002] With the gradual development of OLED (Organic Light Emitting Diode) technology, more and more companies apply OLED technology to the commercialization of lighting and displays. Each company is investing heavily in OLED technology to achieve high-quality and low-cost products, so this technology will certainly be applied to the new generation of general lighting in smart cities. In fact, smart cities need new wireless network infrastructure to support a large number of services. In addition, implementing interconnection between buildings, public lighting, transportation services, vehicles and mobile devices requires a larger communication area. In order to achieve reliable communication, a corresponding number of antennas should be integrated into each product. However, it becomes difficult to integrate the desired number of antennas in each product due to the limited antenna reservation space of these products and the visual pollution they cause. In this case, optical transparent antennas can be properly applied. Optical transparent antennas can be placed in OLED devices such as lighting lamps and display screens to improve network coverage and reduce their visual and spatial impact.

[0003] The existing product antennas in smart cities mostly use PCB, FPC and other product forms. Due to the physical characteristics of their materials and the space requirements of the antennas, they cannot be applied in high light transmittance environments. SUMMARY

[0004] In view of the above shortcomings of the prior art, the purpose of the utility model is to provide an optical transparent WLAN antenna integrated in OLED.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] An optical transparent WLAN antenna integrated in OLED, comprising an OLED chip and an antenna, the OLED chip comprising a metal substrate, an encapsulation layer, a metal cathode, an electron emission layer, an ITO anode and a glass dielectric layer stacked in a vertical direction, the antenna comprising an antenna substrate and an ITO grid layer provided on the antenna substrate, the side of the antenna substrate away from the ITO grid layer being attached to the side of the glass dielectric layer away from the ITO anode.

[0007] Optionally, the ITO grid layer comprises an antenna radiation unit, a connecting part, a transmission line and a grounding unit arranged in a horizontal direction from left to right, the antenna radiation unit and the transmission line are connected through the connecting part, the connecting part is an arc structure, and the transmission line and the grounding unit have a gap therebetween.

[0008] Optionally, the arc structure is a curved line.

[0009] Optionally, the arc structure is a wavy line.

[0010] Optionally, the arc structure is a diagonal line.

[0011] Optionally, the ground unit is a groove structure, the transmission line is arranged in the groove of the groove structure, and the transmission line has a gap with the inner wall of the groove.

[0012] Optionally, the groove structure is in the shape of a "concave" character.

[0013] Optionally, the OLED chip has a length of 56mm and a width of 40mm in the left-right direction, and the antenna has a length of 44mm and a width of 28mm.

[0014] Optionally, the metal cathode has a thickness of 120nm, the electron emission layer has a thickness of 270nm, the ITO anode has a thickness of 150nm, the square resistance of the ITO anode is 11.2Ω / sq, the glass dielectric layer has a thickness of 0.8mm, and the dielectric constant of the glass dielectric layer is 3.78.

[0015] The utility model discloses the beneficial effect lies in:

[0016] The antenna is integrated on the OLED chip, and the antenna is arranged in the light emission direction of the OLED chip to reduce the attenuation of the light transparency of the OLED layer to the maximum. The antenna adopts the ITO grid structure with good conductivity and optical transparency, which takes into account the wireless transmission performance of the antenna while maximizing the light transparency, effectively realizing the application of the antenna in a high-transmittance environment. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 Fig. 1 is a structural schematic diagram of an optical transparent WLAN antenna integrated in an OLED according to an embodiment of the utility model;

[0018] Figure 2 Fig. 2 is a planar structural diagram of an antenna in an optical transparent WLAN antenna integrated in an OLED according to an embodiment of the utility model;

[0019] Figure 3 Fig. 3 is a comparison diagram of S parameter simulation results of an optical transparent WLAN antenna integrated in an OLED according to an embodiment of the utility model and a comparative example;

[0020] Figure 4 Fig. 4 is a comparison diagram of efficiency simulation results of an optical transparent WLAN antenna integrated in an OLED according to an embodiment of the utility model and a comparative example.

[0021] Label explanation:

[0022] 1-metal substrate; 2-encapsulation layer; 3-metal cathode; 4-electron emission layer; 5-ITO anode; 6-glass dielectric layer; 7-antenna substrate; 8-ITO mesh layer; 81-antenna radiation unit; 82-connection part; 83-transmission line; 84-ground unit. DETAILED DESCRIPTION

[0023] In order to more clearly understand the technical content, the purposes and effects of the present application, the present application is described in detail below in combination with specific embodiments and the accompanying drawings. It should be noted that the embodiments and the features in the embodiments of the present application can be combined with each other without conflict. In the following description, a large number of specific details are set forth in order to fully understand the present application, and the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0024] Please refer to Figures 1-2 The technical scheme provided by the present application is:

[0025] An optical transparent WLAN antenna integrated in an OLED includes an OLED chip and an antenna, the OLED chip includes a metal substrate 1, an encapsulation layer 2, a metal cathode 3, an electron emission layer 4, an ITO anode 5 and a glass dielectric layer 6 which are stacked in a vertical direction in turn, and the antenna includes an antenna substrate 7 and an ITO mesh layer 8 provided on the antenna substrate 7, and the side of the antenna substrate 7 away from the ITO mesh layer 8 is attached to the side of the glass dielectric layer 6 away from the ITO anode 5.

[0026] From the above description, the beneficial effects of the present application are that the antenna is integrated on the OLED chip, and the antenna is provided in the light emission direction of the OLED chip to minimize the attenuation of the light transparency of the OLED layer. The antenna adopts an ITO mesh structure with good electrical conductivity and optical transparency, which takes into account the wireless transmission performance of the antenna while maximizing the light transparency, effectively realizing the application of the antenna in a high light transmittance environment.

[0027] Optionally, the ITO mesh layer 8 includes an antenna radiation unit 81, a connection part 82, a transmission line 83 and a ground unit 84 which are arranged in turn from left to right in a horizontal direction, the antenna radiation unit 81 and the transmission line 83 are connected through the connection part 82, the connection part 82 is an arc structure, and the transmission line 83 and the ground unit 84 have a gap therebetween.

[0028] As can be seen from the above description, the use of an arc structure for the transition between the transmission line and the antenna radiating element enables better impedance matching and obtains a larger bandwidth.

[0029] Optionally, the arc structure is a curve.

[0030] Optionally, the arc structure is a wavy line.

[0031] Optionally, the arc structure is a diagonal line.

[0032] As can be seen from the above description, the arc structure can take the form of curves, wavy lines, diagonal lines, etc. The present invention preferably adopts the form of curves, which can provide a smoother electromagnetic distribution and impedance gradient, effectively avoiding and reducing the tip effect and reflection loss.

[0033] Optionally, the grounding unit 84 has a groove-shaped structure, the transmission line 83 is disposed in the groove of the groove-shaped structure, and there is a gap between the transmission line 83 and the inner wall of the groove.

[0034] As can be seen from the above description, the grounding unit adopts a slot structure, which ensures antenna feed impedance matching while achieving better reflection results with the smallest usable area.

[0035] Optionally, the groove structure is U-shaped.

[0036] Optionally, the OLED chip has a length of 56mm × 40mm and a width perpendicular to the left and right directions, and the antenna has a length of 44mm × 28mm.

[0037] Optionally, the metal cathode 3 has a thickness of 120 nm, the electron emission layer 4 has a thickness of 270 nm, the ITO anode 5 has a thickness of 150 nm, the sheet resistance of the ITO anode 5 is 11.2 Ω / sq, the glass dielectric layer 6 has a thickness of 0.8 mm, and the dielectric constant of the glass dielectric layer 6 is 3.78.

[0038] As can be seen from the above description, the present invention preferably adopts the above parameters to achieve a better optically transparent WLAN antenna product integrated into the OLED.

[0039] Please refer to Figures 1-4 Embodiment 1 of this utility model is as follows:

[0040] An optically transparent WLAN antenna integrated in an OLED includes an OLED chip and an antenna. The OLED chip includes a metal substrate 1, an encapsulation layer 2, a metal cathode 3, an electron emission layer 4, an ITO anode 5, and a glass dielectric layer 6 stacked sequentially along a vertical direction. The antenna includes an antenna substrate 7 and an ITO mesh layer 8 disposed on the antenna substrate 7. The side of the antenna substrate 7 away from the ITO mesh layer 8 is attached to the side of the glass dielectric layer 6 away from the ITO anode 5. Figure 1 As shown. The arrow indicates the light emission direction of the OLED chip.

[0041] The ITO mesh layer 8 includes an antenna radiating element 81, a connecting portion 82, a transmission line 83, and a grounding unit 84 arranged sequentially from left to right along a horizontal direction. The antenna radiating element 81 and the transmission line 83 are connected by the connecting portion 82, which has a curved arc structure. The grounding unit 84 has a U-shaped groove structure. The transmission line 83 is disposed within the groove of the groove structure, and there is a gap between the transmission line 83 and the inner wall of the groove. An antenna excitation point is formed between the transmission line 83 and the bottom of the groove. Figure 2 As shown.

[0042] The OLED chip measures 56mm x 40mm in length and is perpendicular to the left-right direction in width. The antenna measures 44mm x 28mm in length and width. The metal cathode 3 is made of aluminum and has a thickness of 120nm. The electron emission layer 4 has a thickness of 270nm. The ITO anode 5 has a thickness of 150nm and a sheet resistance of 11.2Ω / sq. The glass dielectric layer 6 has a thickness of 0.8mm and a dielectric constant of 3.78.

[0043] Using an antenna with the same structure but with the ITO mesh layer replaced by a patch layer as a comparison example, such as... Figure 3 The figure shows a comparison of the S-parameter simulation results of the optically transparent WLAN antenna integrated in the OLED of this embodiment and the comparative example. In the figure, Patch Antenna refers to the antenna in the comparative example, and Mesh Antenna refers to the antenna in this embodiment. As can be seen from the figure, the two curves are slightly different, but both meet the requirement of return loss below -10dB, and when a mesh antenna is used, the low-frequency bandwidth is wider.

[0044] like Figure 4 The figure shows a comparison of the efficiency simulation results between the optically transparent WLAN antenna integrated in the OLED of this embodiment and the comparative example. In the figure, Patch Antenna refers to the antenna in the comparative example, and Mesh Antenna refers to the antenna in this embodiment. As can be seen from the figure, the efficiencies of the two antennas are similar and both exceed 30%.

[0045] It can be seen that the optical transparent WLAN antenna integrated in the OLED in the embodiment can ensure good bandwidth and efficiency and the like while achieving good light transmittance, and achieves full coverage of WLAN 2.4-2.5GHz, 5.15-5.825GHz, 6-7.125GHz.

[0046] In conclusion, the optical transparent WLAN antenna integrated in the OLED in the embodiment can be used in products such as OLED screens, and realizes application of the antenna in a high light transmittance environment.

[0047] The above is only an embodiment of the present application, and does not limit the patent range of the present application, so any modification, equivalent change and modification of the above embodiment according to the technical essence of the present application, without departing from the technical scheme content of the present application, still belongs to the range of the technical scheme of the present application.

Claims

1. An optically transparent WLAN antenna integrated in an OLED, characterized in that, The OLED chip comprises a metal substrate, an encapsulation layer, a metal cathode, an electron emission layer, an ITO anode and a glass medium layer which are stacked in sequence in a vertical direction, and the antenna comprises an antenna substrate and an ITO grid layer arranged on the antenna substrate, and the side of the antenna substrate away from the ITO grid layer is attached to the side of the glass medium layer away from the ITO anode.

2. The optically transparent WLAN antenna integrated in an OLED according to claim 1, wherein, The ITO grid layer comprises an antenna radiation unit, a connecting part, a transmission line and a grounding unit which are arranged in sequence from left to right in a horizontal direction, the antenna radiation unit and the transmission line are connected through the connecting part, the connecting part is an arc structure, and there is a gap between the transmission line and the grounding unit.

3. The optically transparent WLAN antenna integrated in an OLED according to claim 2, wherein, The arc structure is a curve.

4. The optically transparent WLAN antenna integrated in an OLED according to claim 2, wherein, The arc structure is a wavy line.

5. The optically transparent WLAN antenna integrated in an OLED according to claim 2, wherein, The arc structure is an oblique line.

6. The optically transparent WLAN antenna integrated in an OLED according to claim 2, wherein, The grounding unit is a groove structure, the transmission line is arranged in the groove of the groove structure, and there is a gap between the transmission line and the inner wall of the groove.

7. The optically transparent WLAN antenna integrated in an OLED according to claim 6, wherein, The groove structure is in the shape of a "concave" character.

8. The optically transparent WLAN antenna integrated in an OLED according to claim 2, wherein, The OLED chip has a length-width dimension of 56mm*40mm, and the antenna has a length-width dimension of 44mm*28mm.

9. The optically transparent WLAN antenna integrated in an OLED according to claim 1, wherein, The thickness of the metal cathode is 120nm, the thickness of the electron emission layer is 270nm, the thickness of the ITO anode is 150nm, the square resistance of the ITO anode is 11.2Ω / sq, the thickness of the glass medium layer is 0.8mm, and the dielectric constant of the glass medium layer is 3.78.

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