High-reflection-surface nozzle and linear spraying device

Abstract

The utility model provides a high-reflection-surface nozzle and a linear spraying device, and relates to the technical field of evaporation spraying, the high-reflection-surface nozzle is arranged at a nozzle opening of an organic material heating source, and the inner wall of the high-reflection-surface nozzle is a curved-surface reflection surface; and the organic material sprayed from the nozzle towards the side diffusion direction is reflected on the curved reflecting surface, and the emitting direction is consistent with the axial direction of the nozzle. The high-reflection-surface spray nozzle has the beneficial effects that organic materials sprayed out in the diffusion direction are reflected through the curved reflection surface on the inner wall of the high-reflection-surface spray nozzle, and the emitting direction is consistent with the axial direction of the spray opening, so that the organic materials sprayed out of the spray opening are more concentrated, waste of the organic materials can be reduced, and the evaporation efficiency and effect can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of evaporation spraying, in particular to a high-reflection surface nozzle and a linear spraying device. Background Art

[0002] Organic Light-Emitting Diode (OLED) is a new display technology made of organic molecular materials. Compared with traditional liquid crystal displays, OLED has higher brightness, wider viewing angle, faster response speed and higher contrast. It also has the characteristics of self-luminescence and does not require a backlight module, making the display device thinner, more flexible and energy-saving.

[0003] Evaporation technology is one of the key technologies for producing OLED display devices. It heats the organic evaporation source in a vacuum environment, sprays it out from the nozzle of the evaporation machine, and finally forms an OLED film after evaporation and deposition. However, the current nozzle structure cannot achieve efficient use of evaporation materials, and there are problems such as spraying that cannot meet high uniformity and material waste. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model provides a high-reflection surface nozzle installed at the nozzle of an organic material heating source. The inner wall of the high-reflection surface nozzle is a curved reflective surface. The organic material sprayed from the nozzle in a lateral diffusion direction is reflected on the curved reflective surface and the exit direction is consistent with the axial direction of the nozzle.

[0005] Preferably, the bottom and top of the high-reflective surface nozzle are respectively provided with openings, and the diameter of the opening at the top of the high-reflective surface nozzle is larger than the diameter of the opening at the bottom of the high-reflective surface nozzle.

[0006] Preferably, the high-reflection surface nozzle is a cylinder and the length direction is the same as the axial direction of the nozzle.

[0007] Preferably, the outer wall of the high-reflective surface nozzle is provided with a hanging ear.

[0008] Preferably, the high reflective surface nozzle is made of graphite.

[0009] Preferably, the surface of the high-reflective surface nozzle is coated with a graphite coating.

[0010] The utility model also provides a linear spraying device, comprising a plurality of high-reflection surface nozzles as described above, wherein the high-reflection surface nozzles are arranged linearly.

[0011] Preferably, the high-reflection surface nozzles are distributed in multiple rows or other two-dimensionally, and the directions and spacings of the high-reflection surface nozzles may be different.

[0012] The above technical solution has the following advantages or beneficial effects: the organic material sprayed out in the diffusion direction is reflected by the curved reflective surface of the inner wall of the high-reflective surface nozzle, and the exit direction is consistent with the axial direction of the nozzle, so that the organic material sprayed out of the nozzle is more concentrated to meet high uniformity, which can reduce the waste of organic materials and improve the evaporation efficiency and effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural schematic diagram of a high-reflective surface nozzle in a preferred embodiment of the utility model;

[0014] Figure 2 A coordinate diagram of a high-reflective surface nozzle in a preferred embodiment of the utility model;

[0015] Figure 3 It is a schematic diagram of slope derivation in a preferred embodiment of the utility model;

[0016] Figure 4-8 In the preferred embodiment of the utility model, a plurality of highly reflective surface nozzles of different sizes are designed;

[0017] Fig. 9 It is a linear spraying device in a preferred embodiment of the utility model. DETAILED DESCRIPTION

[0018] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. The present invention is not limited to the implementation mode, and other implementation modes may also fall within the scope of the present invention as long as they meet the purpose of the present invention.

[0019] In a preferred embodiment of the utility model, based on the above problems existing in the prior art, a high-reflection surface nozzle is provided, which is installed at the nozzle of the organic material heating source, such as Figure 1 As shown, the inner wall of the high-reflection nozzle is a curved reflective surface 1, and the organic material ejected from the nozzle in the lateral diffusion direction Z is reflected on the curved reflective surface 1 and the exit direction is consistent with the axial direction Y of the nozzle. The dotted line represents the organic material after reflection, and the straight line represents the organic material that is not reflected.

[0020] Specifically, the nozzles used in the existing evaporation spraying process are all simple straight cylinders, and the reflection of organic materials is not taken into consideration. The inner wall of the straight cylinder has low reflection efficiency for organic materials, and the spraying surface is relatively diffuse and the spraying angle is large, so that more organic materials are not evaporated onto the substrate, resulting in material waste. In addition, due to the large diffusion surface, the evaporation effect is not good. In this embodiment, in order to solve these problems, a high-reflection surface nozzle is proposed. The inner wall of the high-reflection surface nozzle adopts a curved surface to form a high-reflection curved surface, so that the organic material has a higher reflection efficiency on the reflection surface, and the organic material sprayed in the diffusion direction is reflected and the exit direction is consistent with the axial direction of the nozzle, so that the organic material sprayed from the nozzle is more concentrated to meet high uniformity, which can reduce the waste of organic materials and improve the evaporation efficiency and effect.

[0021] The curved surface of the utility model is obtained by slope design. From the cross section of the high-reflection surface nozzle, the curved reflective surface is a curve. Based on this, the curved reflective surface is analyzed. In the cross section, the center of the nozzle is taken as the coordinate origin, the axial direction of the spraying is the Y axis, and the width direction of the high-reflection surface nozzle is taken as the X axis to establish a coordinate system; the curved surface starts from the edge of the nozzle and is Figure 2 As shown in , the right side is the positive direction of the X axis. Assuming the diameter of the nozzle is 6, the starting point of the curved reflective surface on the right side is (3, 0.01). Here, the y value is taken as an infinitesimal 0.01 to calculate the slope, which can be regarded as infinitely close to 0, and the curve is obtained. The end point ends at the space limit. After we know the starting point, we can get the coordinates of the next point by calculating the slope of (3, 0.01). The derivation process is as follows:

[0022] Assume that the coordinates of a point A on the curved reflection surface are (X0, Y0). Figure 3 From the auxiliary angles and auxiliary lines in the figure, we can see that:

[0023] ∠α+∠β=∠α+∠γ=90°=>∠β=∠γ

[0024] ∠β'=∠β=>∠β'=∠γ=>CD=CB

[0025] Because S OAB =S OAC+ S CAB , S OAB =1 / 2×OB×AB, S OAC =1 / 2×OA×CD

[0026] , S CAB =1 / 2×CB×AB;

[0027] We can get OB×AB=OA×CD+CB×AB

[0028] That is, OB×AB=OA×CB+CB×AB

[0029] CB=OB×AB / (OA+AB)

[0030] So K0=tanθ=AB / CB=>K0=(AB+OA) / OB

[0031] Because OB=x0,AB=y0,

[0032] so

[0033] Therefore, the slope at point A (X0, Y0) is K0. Since the nozzle sprays outward in a fan shape (the nozzle is idealized to spray organic materials from one point), the organic material sprayed from the center of the nozzle to point A will be reflected at point A (total reflection occurs by default), making the emission direction consistent with the Y-axis direction.

[0034] Furthermore, we need to generate a curved reflection surface. In the cross section, the curved reflection surface is a curve, which includes multiple points on the surface. Then the next point on the curve (X i+1 ,Y i+1 ) can be calculated based on the current point (X i ,Y i ) and the slope K of the current point i Find:

[0035] Y i+1 =K i (X i+1 -X i )+Y i+1

[0036] We increase the X coordinate of the next point by the set step size (for example, 0.01). In this way, we can calculate the coordinates of each point on the curve in the cross section, and then obtain the coordinates of each point on the curved reflective surface to process the curved reflective surface. The organic material sprayed from the fan-shaped nozzle to each point on the curved reflective surface will be reflected at the corresponding point and the exit angle is consistent with the Y axis. Therefore, the organic material sprayed from the high-reflective surface nozzle of this embodiment is more concentrated, and because the exit direction of the organic material after reflection is consistent with the Y axis, the reflection effect will be more concentrated compared to the ordinary straight nozzle, avoiding the waste of organic materials and improving the evaporation effect and efficiency.

[0037] In a preferred embodiment of the utility model, the bottom and top of the high-reflection surface nozzle are respectively provided with openings, and the diameter of the opening at the top of the high-reflection surface nozzle is larger than the diameter of the opening at the bottom of the high-reflection surface nozzle; the high-reflection surface nozzle is a cylinder and the length direction is the same as the spraying direction of the nozzle.

[0038] Specifically, according to the aforementioned processing method in this embodiment, a high-reflective surface nozzle with a gradually increasing inner diameter is obtained, rather than a high-reflective surface nozzle with a gradually decreasing inner diameter, which can concentrate the organic material sprayed from the nozzle toward the substrate and achieve a better evaporation effect.

[0039] like Figure 4-8 As shown in the figure, the units of the figures are all mm, which are various high-reflective surface nozzles designed for nozzles of different diameters in this embodiment. Figure 4 The middle one is a high-reflective nozzle with a bottom opening diameter of 6, which is suitable for a nozzle with a diameter of 6; Figure 5 The middle one is a high-reflective nozzle with a bottom opening diameter of 8, which is suitable for a nozzle with a diameter of 8; Figure 6 The middle one is a high-reflective surface nozzle with a bottom opening diameter of 10, which is suitable for a nozzle with a diameter of 10;

[0040] in Figure 7 The middle one is a high reflective surface nozzle with a bottom opening diameter of 6, which is suitable for a nozzle with a diameter of 6. Figure 7 The high reflective surface of the nozzle is a quadratic parabola surface Y i+1 =a(X i+1 -X i ) 2 +Y i+1 , a is the coefficient of the quadratic parabola, a = 0.4;

[0041] in Figure 8 The middle one is a high reflective surface nozzle with a bottom opening diameter of 6, which is suitable for a nozzle with a diameter of 6. Figure 8 The high reflective surface of the nozzle is a quadratic parabola surface Y i+1 =a(X i+1 -X i ) 2 +Y i+1 , a is the coefficient of the quadratic parabola, a=0.8.

[0042] Figure 7 and Figure 8 Although the curved radiating surface of the quadratic parabola is not as good as the curved reflective surface with a slope we designed, it still has better effects than the traditional straight nozzle and is also an alternative implementation method.

[0043] In a preferred embodiment of the utility model, a hanging ear 2 is provided on the outer wall of the high-reflection surface nozzle.

[0044] Specifically, in this embodiment, Figure 1 As shown, a hanging ear is also provided on the outer wall of the high-reflection surface nozzle, and the hanging ear can facilitate the installation and removal of the high-reflection surface nozzle on the nozzle.

[0045] In a preferred embodiment of the utility model, the high-reflection surface nozzle is made of graphite; and the surface of the high-reflection surface nozzle is coated with a graphite coating.

[0046] Specifically, in this embodiment, the high-reflection surface nozzle is made of graphite or made of metal material and then a graphite coating is sprayed on the metal surface, which can improve the reflection effect and high temperature resistance of the high-reflection surface nozzle.

[0047] The utility model also provides other combined spraying devices, such as Fig. 9 As shown, it includes a plurality of high-reflection surface nozzles 100 as described above. The high-reflection surface nozzles 100 are arranged linearly to obtain a linear spraying device, and multiple rows or other two-dimensional distributions can obtain a surface spraying device.

[0048] Specifically, a linear spraying device can be obtained by arranging the high-reflection surface nozzles 100 provided by the utility model in a linear arrangement. The orientation and spacing of each high-reflection surface nozzle can be freely matched to form a linear spraying area, which forms a complete spraying surface through reciprocating motion. Multiple rows or other two-dimensionally distributed high-reflection surface nozzles 100 can directly form a complete spraying surface for spraying different positions of the substrate.

[0049] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the contents of this specification and illustrations should be included in the protection scope of the present invention.

Claims

1. A highly reflective nozzle, characterized in that: The nozzle is installed at the organic material heating source, the inner wall of the high-reflection nozzle is a curved reflective surface, the organic material sprayed from the nozzle in the lateral diffusion direction is reflected on the curved reflective surface and the exit direction is consistent with the axial direction of the nozzle.

2. The high reflective surface nozzle according to claim 1, characterized in that: The bottom and top of the high-reflection surface nozzle are respectively provided with openings, and the diameter of the opening at the top of the high-reflection surface nozzle is larger than the diameter of the opening at the bottom of the high-reflection surface nozzle.

3. The high reflective surface nozzle according to claim 1, characterized in that: The high-reflection surface nozzle is a cylinder, and the length direction is the same as the axial direction of the nozzle.

4. The high reflective surface nozzle according to claim 1, characterized in that: The outer wall of the high-reflection surface nozzle is provided with a hanging ear.

5. The high reflective surface nozzle according to claim 1, characterized in that: The high-reflection surface nozzle is made of graphite.

6. The high reflective surface nozzle according to claim 1, characterized in that: The surface of the high-reflection nozzle is coated with a graphite coating.

7. A linear spraying device, characterized in that: It comprises a plurality of high-reflection surface nozzles as described in any one of claims 1 to 6, wherein each of the high-reflection surface nozzles is arranged linearly.

8. The linear spraying device according to claim 7, characterized in that: The high-reflection surface nozzles may be arranged in multiple rows or other two-dimensional distributions, and the directions and spacings of the high-reflection surface nozzles may be different.

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