Low-cost self-luminous OLED (Organic Light Emitting Diode) light-transmitting aiming lens and manufacturing method thereof

Abstract

The invention discloses a low-cost self-luminous OLED light-transmitting aiming lens and a manufacturing method thereof.The aiming lens comprises a high-transmittance glass substrate, an aiming auxiliary line and an OLED light-emitting layer are arranged on the substrate, the aiming auxiliary line is manufactured through the photoetching technology and is formed by stacking a transparent conductive film and a high-reflectivity metal conductive film, and the OLED light-emitting layer is arranged on the OLED light-emitting layer. And the contrast ratio and the uniformity of the light-emitting pattern are improved. In the manufacturing method, a common evaporation mask plate and an electrode patterning process are combined to generate an aiming auxiliary line pattern, patterning of a transparent cathode and anode connecting area is completed step by step, cost is reduced, the hole blocking problem in fine mask plate production is avoided, the consistency of a light-emitting area is higher, and finally, the light-emitting efficiency is improved. The transparent film packaging layer covers the surface of the light-emitting layer, so that the environmental adaptability and the service life of the product are effectively improved; according to the invention, the cost can be reduced, and the product has good aiming precision and environmental adaptability.

Description

Technical Field

[0001] The present invention relates to the technical field, and in particular to a low-cost self-luminous OLED light-transmitting aiming lens and a manufacturing method thereof. Background Art

[0002] In order to meet the demand for high-precision optical sights in the outdoor field, the center reticle prompt line of the sight needs to have self-luminous ability to form a higher contrast aiming point prompt and improve aiming accuracy. Translucent self-luminous sights are widely used in telescope observation fields such as optical aiming and auxiliary observation due to their characteristics of no electronic noise, high transmittance, high aiming point contrast, and customization. They are the core components for improving aiming and observation capabilities.

[0003] In general translucent sights, the aiming mark area is in the form of metal differentiation lines, mainly metal crosses or metal circles. The translucent pattern at the center of the aiming mark is superimposed on the external environment to form a sight center prompt function. However, since the metal differentiation line does not have the ability to emit light, the mark in the aiming prompt area is prone to mutual interference with the outdoor background environment when aiming, which makes it difficult to identify the aiming area mark. In general translucent sights, a ring LED is usually used to illuminate the central divided aiming area to form a central light emission, which can solve the problem that the mark in the aiming prompt area is prone to mutual interference with the outdoor background environment when aiming, making it difficult to identify the aiming area. However, the ring LED light source has the disadvantages of high power consumption and large size, which makes it inconvenient to use.

[0004] Known solutions using OLED as the light-emitting design for the transparent reticle aiming area mostly use a fine mask transfer method to evaporate and form a specific light-emitting pattern. Since the auxiliary aiming line width of a general sight is only a few microns wide, a more expensive customized fine mask is required. In addition, the line width is easily reduced over time due to the accumulated film thickness caused by evaporation during the production process.

[0005] In summary, the existing technical solution of using fine mask to produce OLED transmissive aiming lens has problems such as high production cost and easy hole blocking in the production process. Summary of the invention

[0006] Technical purpose: In view of the shortcomings of the existing aiming lens structure and manufacturing method, the present invention discloses a low-cost self-luminous OLED light-transmitting aiming lens and its manufacturing method. By introducing electrode patterning structure technology combined with ordinary evaporation mask, a high-brightness OLED light-emitting pattern with self-luminous ability and aiming prompt effect is formed, which solves the problem of high OLED process cost caused by the introduction of fine mask, and provides a solution for low-cost and lightweight optical sights.

[0007] Technical solution: To achieve the above technical objectives, the present invention adopts the following technical solution: A low-cost self-luminous OLED light-transmitting aiming lens comprises a glass substrate with high transmittance, aiming auxiliary lines are arranged on the glass substrate, the aiming auxiliary lines comprise a horizontal observation auxiliary line, an aiming observation auxiliary line, a cathode connection line, an anode connection line, a cathode external connection area and an anode external connection area, the horizontal observation auxiliary line is arranged on the surface of the glass substrate for providing a horizontal alignment reference, the aiming observation auxiliary line is located at the center of the glass substrate for providing an aiming reference, the cathode connection line is connected to the cathode external connection area, one end of the anode connection line is connected to the aiming observation auxiliary line, and the other end is connected to the anode external connection area, the cathode external connection area and the anode external connection area are both located at the edge of the glass substrate and are symmetrically arranged; An OLED light-emitting layer is also provided on the glass substrate, and the OLED light-emitting layer covers the aiming and observation auxiliary line and part of the anode connecting line, and the part where the OLED light-emitting layer contacts the aiming and observation auxiliary line is combined to form a light-emitting spot.

[0008] Preferably, the aiming auxiliary line is formed by stacking a metal conductive film with high reflectivity and a transparent conductive film with high transmittance, and the metal conductive film is located on the upper layer of the transparent conductive film.

[0009] Preferably, the aiming auxiliary line is formed into an image through a photolithography patterning process, and a specific pattern effect is formed by a metal conductive film and a transparent conductive film, wherein the metal conductive film constitutes a reflective pattern surface, and the transparent conductive film is connected to the anode connection line after patterning.

[0010] Preferably, the thickness of the metal conductive film is in the range of 30 nm to 150 nm, and the thickness of the transparent conductive film is in the range of 50 nm to 150 nm.

[0011] Preferably, the surface of the OLED light-emitting layer is respectively covered with a semi-transparent metal cathode and a dense transparent thin film encapsulation layer, the transparent thin film encapsulation layer is located above the semi-transparent metal cathode, and a transparent cathode connection area is provided below the semi-transparent metal cathode, and the transparent cathode connection area is connected to the cathode connection line.

[0012] Preferably, the OLED light emitting layer is red, green, yellow or other specific colors.

[0013] Preferably, the thickness of the OLED light-emitting layer is in the range of 100 nm to 300 nm, and the thickness of the semi-transparent metal cathode is in the range of 10 nm to 20 nm.

[0014] Preferably, the transparent thin film encapsulation layer is grown using a transparent medium, and the constituent material includes one or more of SiO2, SiON, SiN, Al2O3, and TiO2, with a total thickness of 1 μm.

[0015] Preferably, a transparent anode connection area is further provided at a position of the glass substrate vertically symmetrical to the transparent cathode connection area.

[0016] The present invention also provides a method for manufacturing a low-cost self-luminous OLED light-transmitting aiming lens, which is used to manufacture the low-cost self-luminous OLED light-transmitting aiming lens described above, and comprises the following steps: Step 1: sputtering an ITO film and metal Al and TiN films on a glass substrate in sequence to form a transparent conductive film and a metal conductive film; Step 2, spin-coating a layer of photoresist on the glass substrate obtained in step 1, and using an exposure machine to form specific alignment marks, horizontal observation auxiliary lines, aiming observation auxiliary lines, cathode connection lines, anode connection lines, cathode external connection areas and anode external connection areas, to complete the first patterning production; Step 3: using an etching device to etch the surface of the glass substrate, leaving the metal conductive film and transparent conductive film area patterns formed in step 2; Step 4: Spin-coat a layer of photoresist on the glass substrate obtained in step 3, and use an exposure machine to expose according to the alignment mark formed in step 1, thereby completing the pattern exposure and development of the transparent cathode connection area, and completing the second patterning production; Step 5: Use an etching device to perform a metal etching process on the surface of the glass substrate, thereby completing the second patterning and leaving a transparent cathode connection area pattern; Step 6: Use an organic vapor deposition pattern mask to complete vapor deposition in a specific area of ​​the OLED light-emitting layer to obtain the OLED light-emitting layer, and then replace the cathode vapor deposition mask to complete vapor deposition in a specific area of ​​the semi-transparent metal cathode to obtain a semi-transparent metal cathode; Step 7: Using a thin film encapsulation device to complete the production of a dense transparent thin film encapsulation layer on a glass substrate; Step 8: Use a cutting device to cut the processed glass substrate into specific patterns to complete the production.

[0017] Beneficial effects: The low-cost self-luminous OLED light-transmitting aiming lens and the manufacturing method thereof provided by the present invention have the following beneficial effects: The present invention adopts a common vapor deposition mask to replace a fine mask, and combines it with an electrode patterning photolithography process to form a specific aiming auxiliary line structure on a glass substrate, so as to achieve a smaller auxiliary line width, realize a smaller affected area during auxiliary observation, and greatly improve the auxiliary effect of the aiming lens; at the same time, it has the characteristics of high consistency in the size of the luminous area, and can effectively avoid the problem of unclear luminous brightness at the edge of the luminous figure due to uneven film thickness at the vapor deposition edge or discontinuity of the luminous area caused by the risk of material clogging in the vapor deposition process when using a fine mask to make a luminous figure, thereby effectively improving production efficiency and significantly reducing manufacturing cost and maintenance cost, and the process is simple and controllable.

[0018] The present invention adopts a superimposed structural design of a transparent conductive film and a high-reflectivity metal conductive film, so that the aiming auxiliary line is not only light-transmissive, but also provides a higher contrast when emitting light. In particular, the OLED light-emitting layer at the aiming and observation auxiliary line position can be directly combined with the transparent conductive film to form a clear light spot. This structural feature makes the edge of the light-emitting area uniform and the light brightness consistent, ensuring that the aiming point is always clearly visible in various environments, thereby improving the aiming accuracy and user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0020] Figure 1 It is a structural schematic diagram of the aiming auxiliary line of the present invention; Figure 2 It is a schematic diagram of the longitudinal structure of the light-emitting layer region of the OLED of the present invention; Figure 3 To complete the schematic diagram of the structure of the OLED transparent anode; Figure 4 To complete the schematic diagram of the structure of the transparent cathode of OLED; Figure 5 This is a schematic diagram of the aiming assist display status when it is lit; Figure 6 The present invention is a flow chart of the method for manufacturing the low-cost self-luminous OLED light-transmitting aiming lens.

[0021] In the figure: 101, cathode external connection area; 201, cathode connection line; 301, transparent cathode connection area; 401, aiming and observation auxiliary line; 4011, transparent conductive film; 4012, metal conductive film; 402, OLED light-emitting layer; 403, semi-transparent metal cathode; 501, horizontal observation auxiliary line; 601, transparent anode connection area; 701, anode connection line; 801, anode external connection area; 901, transparent thin film encapsulation layer. DETAILED DESCRIPTION

[0022] The present invention will be described more clearly and completely below by way of a preferred embodiment in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiment.

[0023] like Figure 1 As shown, the present invention provides a low-cost self-luminous OLED light-transmitting aiming lens, comprising a glass substrate with high transmittance, on which aiming auxiliary lines are arranged, the aiming auxiliary lines comprising a horizontal observation auxiliary line 501, an aiming observation auxiliary line 401, a cathode connection line 201, an anode connection line 701, a cathode external connection area 101 and an anode external connection area 801, the horizontal observation auxiliary line 501 is arranged on the surface of the glass substrate for providing a horizontal alignment reference, and is located on the horizontal center line of the glass substrate, and the aiming observation auxiliary line 401 is located on the horizontal center line of the glass substrate. The center is used to provide an aiming reference. The aiming observation auxiliary line is circular and does not touch the horizontal observation auxiliary line 501. The cathode connection line 201 is connected to the cathode external connection area 101, which is located on the vertical midline of the upper half of the glass substrate. One end of the anode connection line 701 is connected to the aiming observation auxiliary line 401, and the other end is connected to the anode external connection area 801, which is located on the vertical midline of the lower half of the glass substrate, forming a light-emitting anode and an anode lighting interface. The cathode external connection area 101 and the anode external connection area 801 are both located at the edge of the glass substrate and are symmetrically arranged. An OLED light-emitting layer 402 is also provided on the glass substrate, and the OLED light-emitting layer 402 covers the aiming and observation auxiliary line 401 and part of the anode connecting line 701 . The OLED light-emitting layer 402 is circular, and the part where the OLED light-emitting layer 402 contacts the aiming and observation auxiliary line 401 combines to form a light spot 404 .

[0024] In one embodiment, Figure 2 As shown, the aiming auxiliary line is composed of a metal conductive film 4012 with high reflectivity and a transparent conductive film 4011 with high transmittance, and the metal conductive film 4012 is located on the upper layer of the transparent conductive film 4011.

[0025] like Figure 3 As shown, the aiming auxiliary line is formed by a photolithography patterning process, and a specific pattern effect is formed by a metal conductive film 4012 and a transparent conductive film 4011, wherein the metal conductive film 4012 constitutes a reflective pattern surface, and the transparent conductive film 4011 is connected to the anode connection line 701 after patterning.

[0026] In one embodiment, the thickness of the metal conductive film 4012 is in the range of 30 nm to 150 nm, and the thickness of the transparent conductive film 4011 is in the range of 50 nm to 150 nm.

[0027] In one embodiment, Figure 2 , Figure 3 and Figure 4 As shown, the surface of the OLED light-emitting layer 402 is respectively covered with a semi-transparent metal cathode 403 and a dense transparent thin film encapsulation layer 901, which is used to prevent the water and oxygen in the air from corroding the OLED material and improve the working life and optical transmittance of the light-emitting material; the transparent thin film encapsulation layer 901 is grown using a transparent medium, and the constituent materials include one or more of SiO2, SiON, SiN, Al2O3, and TiO2, and the total thickness is 1 μm; The transparent thin film encapsulation layer 901 is located above the translucent metal cathode 403, and a transparent cathode connection area 301 is provided below the translucent metal cathode 403. The transparent cathode connection area 301 is connected to the cathode connection line 201, wherein the portion of the translucent metal cathode 403 that contacts the OLED light-emitting layer 402 is circular in shape and completely covers the OLED light-emitting layer 402, and the portion of the translucent metal cathode 403 located in the transparent cathode connection area 301 is arc-shaped, and its circular portion is connected by a straight line.

[0028] In one embodiment, the OLED light emitting layer 402 is red, green, yellow or other specific colors.

[0029] In one embodiment, the thickness of the OLED light emitting layer 402 varies according to different requirements of the light emitting device, and the typical thickness range is 100nm~300nm. The thickness of the semi-transparent metal cathode 403 varies according to different optical design requirements, and the typical thickness range is 10nm~20nm.

[0030] A transparent anode connection area 601 is also provided at a position vertically symmetrical between the glass substrate and the transparent cathode connection area 301. The transparent anode connection area 601 is located below the OLED light-emitting layer 402 and is divided into two parts by the anode connection line 701. Both parts are not in contact with the OLED light-emitting layer 402 and the anode connection line 701.

[0031] like Figure 5 As shown, the working method of the low-cost self-luminous OLED light-transmitting aiming lens provided by the present invention is: a positive voltage is applied to the anode external connection area 801, and a loop is connected to the cathode external connection area 101, and the OLED light-emitting layer 402 located above the aiming and observation auxiliary line 401 is energized to form light, and a reflective light-emitting area 404 is formed through the high-reflectivity aiming auxiliary line metal conductive layer 4012, and finally a graphical aiming auxiliary effect is formed.

[0032] Its working method also includes that when the voltage range is set to 0~20V, a gradual aiming assistance light spot effect can be observed, and the aiming assistance effect gradually becomes brighter as the applied voltage increases, forming a luminous auxiliary aiming effect in different application scenarios.

[0033] like Figure 6 As shown, the present invention also provides a method for manufacturing a low-cost self-luminous OLED light-transmitting aiming lens, which is used to manufacture the low-cost self-luminous OLED light-transmitting aiming lens mentioned above, comprising the following steps: Step 1: sputter ITO film and metal Al and TiN films on the glass substrate in sequence to form a transparent conductive film 4011 and a metal conductive film 4012, wherein the transparent conductive film will serve as an anode substrate, and the metal conductive film will be used for reflection and conduction to improve the contrast and reflection effect of the aiming auxiliary line.

[0034] Step 2: Spin-coat a layer of photoresist on the glass substrate obtained in step 1, and use an exposure machine to form specific alignment marks, horizontal observation auxiliary lines 501, aiming observation auxiliary lines 401, cathode connection lines 201, anode connection lines 701, cathode external connection areas 101 and anode external connection areas 801, and complete the first patterning. These patterns constitute the basic electrode structure of the aiming lens, which is used to form electrical connection and visual reference; Step 3: Use an etching device to etch the surface of the glass substrate using a conventional metal etching process, leaving behind the metal conductive film 4012 and the transparent conductive film 4011 area patterns formed in step 2; This step ensures that the guide line graphics are accurate and increases the contrast of the illuminated areas.

[0035] Step 4: Spin-coat a layer of photoresist on the glass substrate obtained in step 3, and use an exposure machine to expose according to the alignment mark formed in step 1, so as to complete the pattern exposure and development of the transparent cathode connection area 301, and complete the second patterning production; This step is used to define the connection area of ​​the cathode region and ensure that the two ends of the OLED are opaque anode and transparent cathode connection areas, respectively, thereby separating the anode and cathode regions to form a characteristic light-emitting pattern.

[0036] Step 5: Use an etching device to perform a metal etching process on the surface of the glass substrate, thereby completing the second patterning and leaving a transparent cathode connection area 301 pattern; Step 6: Use an organic vapor deposition pattern mask to complete vapor deposition in a specific area of ​​the OLED light-emitting layer to obtain an OLED light-emitting layer 402, and then replace the cathode vapor deposition mask to complete vapor deposition in a specific area of ​​the semi-transparent metal cathode to obtain a semi-transparent metal cathode 403; Step 7: Using a thin film encapsulation device to complete the production of a dense transparent thin film encapsulation layer 901 on the glass substrate; The transparent thin film encapsulation layer 901 is made of one or more transparent media such as SiO2, SiON, SiN, Al2O3, TiO2, with a total thickness of 1 μm to prevent moisture and oxygen in the environment from corroding the OLED material, thereby improving the stability and life of the light-emitting layer.

[0037] Step 8: Use a cutting device to cut the processed glass substrate into specific patterns to complete the production.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A low-cost self-luminous OLED light-transmitting aiming lens, characterized in that: A glass substrate with high transmittance is provided on the glass substrate, wherein the glass substrate is provided with aiming auxiliary lines, the aiming auxiliary lines comprising a horizontal observation auxiliary line (501), an aiming observation auxiliary line (401), a cathode connection line (201), an anode connection line (701), a cathode external connection area (101) and an anode external connection area (801), wherein the horizontal observation auxiliary line (501) is provided on the surface of the glass substrate and is used to provide a horizontal alignment reference, the aiming observation auxiliary line (401) is located at the center of the glass substrate and is used to provide an aiming reference, the cathode connection line (201) is connected to the cathode external connection area (101), one end of the anode connection line (701) is connected to the aiming observation auxiliary line (401) and the other end is connected to the anode external connection area (801), and the cathode external connection area (101) and the anode external connection area (801) are both located at the edge of the glass substrate and are symmetrically arranged; An OLED light-emitting layer (402) is also provided on the glass substrate, and the OLED light-emitting layer (402) covers the aiming and observation auxiliary line (401) and part of the anode connection line (701), and the part where the OLED light-emitting layer (402) contacts the aiming and observation auxiliary line (401) is combined to form a light-emitting spot (404).

2. A low-cost self-luminous OLED light-transmitting aiming lens according to claim 1, characterized in that: The aiming auxiliary line is composed of a metal conductive film (4012) with high reflectivity and a transparent conductive film (4011) with high transmittance, and the metal conductive film (4012) is located on the upper layer of the transparent conductive film (4011).

3. A low-cost self-luminous OLED light-transmitting aiming lens according to claim 2, characterized in that: The aiming auxiliary line is formed into an image through a photolithography patterning process, and is composed of a metal conductive film (4012) and a transparent conductive film (4011) to form a specific graphic effect, wherein the metal conductive film (4012) constitutes a reflective graphic surface, and the transparent conductive film (4011) is connected to the anode connecting line (701) after patterning.

4. A low-cost self-luminous OLED light-transmitting aiming lens according to claim 3, characterized in that: The thickness of the metal conductive film (4012) ranges from 30nm to 150nm, and the thickness of the transparent conductive film (4011) ranges from 50nm to 150nm.

5. The low-cost self-luminous OLED light-transmitting aiming lens according to claim 1, characterized in that: The surface of the OLED light-emitting layer (402) is respectively covered with a semi-transparent metal cathode (403) and a dense transparent thin film encapsulation layer (901); the transparent thin film encapsulation layer (901) is located above the semi-transparent metal cathode (403); a transparent cathode connection area (301) is provided below the semi-transparent metal cathode (403); and the transparent cathode connection area (301) is connected to a cathode connection line (201).

6. The low-cost self-luminous OLED light-transmitting aiming lens according to claim 5, characterized in that: The OLED light-emitting layer (402) is one of red, green, yellow or other specific colors.

7. The low-cost self-luminous OLED light-transmitting aiming lens according to claim 5, characterized in that: The thickness of the OLED light-emitting layer (402) ranges from 100 nm to 300 nm, and the thickness of the semi-transparent metal cathode (403) ranges from 10 nm to 20 nm.

8. The low-cost self-luminous OLED light-transmitting aiming lens according to claim 5, characterized in that: The transparent thin film encapsulation layer (901) is grown using a transparent medium, and its constituent materials include one or more of SiO2, SiON, SiN, Al2O3, and TiO2, with a total thickness of 1 μm.

9. The low-cost self-luminous OLED light-transmitting aiming lens according to claim 5, characterized in that: A transparent anode connection area (601) is also provided at a position vertically symmetrical to the transparent cathode connection area (301) on the glass substrate.

10. A method for manufacturing a low-cost self-luminous OLED light-transmitting aiming lens, used for manufacturing a low-cost self-luminous OLED light-transmitting aiming lens as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: sputtering an ITO film and metal Al and TiN films on a glass substrate in sequence to form a transparent conductive film and a metal conductive film; Step 2, spin-coating a layer of photoresist on the glass substrate obtained in step 1, and using an exposure machine to form specific alignment marks, horizontal observation auxiliary lines, aiming observation auxiliary lines, cathode connection lines, anode connection lines, cathode external connection areas and anode external connection areas, to complete the first patterning production; Step 3: using an etching device to etch the surface of the glass substrate, leaving the metal conductive film and transparent conductive film area patterns formed in step 2; Step 4: Spin-coat a layer of photoresist on the glass substrate obtained in step 3, and use an exposure machine to expose according to the alignment mark formed in step 1, thereby completing the pattern exposure and development of the transparent cathode connection area, and completing the second patterning production; Step 5: Use an etching device to perform a metal etching process on the surface of the glass substrate, thereby completing the second patterning and leaving a transparent cathode connection area pattern; Step 6: Use an organic vapor deposition pattern mask to complete vapor deposition in a specific area of ​​the OLED light-emitting layer to obtain the OLED light-emitting layer, and then replace the cathode vapor deposition mask to complete vapor deposition in a specific area of ​​the semi-transparent metal cathode to obtain a semi-transparent metal cathode; Step 7: Using a thin film encapsulation device to complete the production of a dense transparent thin film encapsulation layer on a glass substrate; Step 8: Use a cutting device to cut the processed glass substrate into specific patterns to complete the production.

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