An OLED display circuit structure and an OLED segment code display device

Abstract

The application relates to an OLED display circuit structure and an OLED segment code display device, wherein the OLED display circuit structure drives at least one light-emitting display pattern in an OLED display area, and the OLED display circuit structure comprises a substrate, at least one ITO anode wire arranged on the substrate, at least one first metal wire arranged on the ITO anode wire and located on a side far from the substrate, and at least one opening in the first metal wire, wherein the shape of the opening corresponds to the shape of the light-emitting display pattern. The application can improve the brightness of the pattern display without adding new devices and can ensure efficient and stable operation of the display device.

Description

Technical Field

[0001] This invention relates to the field of display device technology, specifically to an OLED display circuit structure and an OLED segment display device. Background Technology

[0002] OLED segment displays are capable of displaying numbers, characters, and graphics. Their main features include high brightness and high contrast, fast response time, low power consumption, thinness, and support for controllable grayscale and perfect black levels. In OLED segment displays, the anode traces of the effective light-emitting area are typically made of ITO (Indium Tin Oxide), and the traces in the non-display area also use ITO. However, the cathode traces are metal traces. Metal traces have a certain thickness, and the thickness of the metal side traces around the display area can reflect light from the light-emitting area, creating a bright line that affects the display effect.

[0003] In addition, existing OLED segment displays use high-brightness components and increase voltage to improve brightness, but this inevitably increases costs and power consumption, and increasing voltage also reduces product lifespan.

[0004] Therefore, a new type of OLED segment display device is needed to improve display brightness and display effect. Summary of the Invention

[0005] A primary objective of this invention is to overcome at least one of the aforementioned defects by providing a novel OLED display circuit structure that can improve display brightness and avoid the generation of bright stripes on the cathode metal side traces.

[0006] A primary objective of this invention is to overcome at least one of the aforementioned deficiencies and to provide an OLED segment display device that can improve the brightness of the graphic display without adding any new components, while ensuring the efficient and stable operation of the display device.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] This invention provides an OLED display circuit structure for driving at least one light-emitting display pattern in an OLED display area, comprising:

[0009] substrate;

[0010] At least one ITO anode trace is disposed on the substrate;

[0011] At least one first metal trace is disposed on the ITO anode trace and located on the side away from the substrate;

[0012] The first metal trace has at least one opening, the shape of which corresponds to the shape of the light-emitting display graphic.

[0013] According to one embodiment of the present invention, the thickness of the ITO anode trace is 100-150 nanometers.

[0014] According to one embodiment of the present invention, the thickness of the first metal trace is 150 to 250 nanometers.

[0015] According to one embodiment of the present invention, the first metal trace is made of molybdenum-aluminum-molybdenum metal material.

[0016] According to one embodiment of the present invention, a second metal trace serving as a cathode metal side trace is provided on the outer periphery of the OLED display area.

[0017] In particular, the present invention also provides an OLED segment display device, comprising:

[0018] substrate;

[0019] An ITO anode layer is disposed on the substrate;

[0020] A metal conductor layer is disposed on the ITO anode and located on the side away from the substrate;

[0021] An insulating layer is disposed on the metal wire layer and located on the side away from the ITO anode; an organic light-emitting layer is disposed on the insulating layer and located on the side away from the metal wire layer.

[0022] A metal cathode is disposed on the organic light-emitting layer and located on the side away from the insulating layer;

[0023] The circuit structure between the ITO anode layer and the metal conductor layer adopts the OLED display circuit structure described above.

[0024] According to one embodiment of the present invention, the ITO anode layer includes at least one ITO anode trace, the metal conductor layer includes at least one first metal trace, the first metal trace is disposed on each ITO anode trace, and the first metal trace is located on the side away from the substrate.

[0025] According to one embodiment of the present invention, the OLED segment display device has at least one light-emitting display pattern and at least one opening on the first metal trace, the shape of the opening corresponding to the shape of the light-emitting display pattern.

[0026] According to one embodiment of the present invention, the metal cathode includes at least one metal cathode trace, and the metal conductor layer further includes at least one second metal trace, the second metal trace being disposed on the outer periphery of the OLED segment display device, and the second metal trace being connected to the metal cathode trace.

[0027] According to one embodiment of the invention, a cover plate is further included, disposed on the metal cathode and located on the side away from the organic light-emitting layer.

[0028] According to one embodiment of the present invention, the first metal trace and the second metal trace are made of molybdenum-aluminum-molybdenum metal material.

[0029] Compared with the prior art, the advantages and beneficial effects of the OLED display circuit structure and OLED display device disclosed in this patent application are as follows:

[0030] The OLED display circuit structure of this application overlaps the side bright lines formed by the thickness difference between the ITO anode trace and the first metal trace in the light-emitting display area and the non-light-emitting area. In short, it reflects the bright light generated by the organic light-emitting layer through the side of the first metal trace, and then overlaps the reflected light with the light-emitting area of ​​the organic light-emitting layer, thereby enhancing the brightness of the light-emitting display pattern, improving the optical utilization rate of the light-emitting display pattern, and thus effectively improving the overall display effect of the OLED segment display device based on this circuit structure.

[0031] Furthermore, improving the display effect of OLED segment display devices does not involve the introduction of new components and does not increase manufacturing costs. In addition, improving the display effect of OLED segment display devices does not require increasing brightness by increasing voltage, thus ensuring that the lifespan of the display device remains unaffected.

[0032] Furthermore, the optimized design of the metal traces in the non-display area of ​​the OLED display circuit structure can prevent the light from the illuminated display pattern from scattering to the outer periphery, thereby avoiding the problem of light leakage caused by reflection from the metal traces. Attached Figure Description

[0033] The following sections will describe some specific embodiments of the invention in detail by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or portions. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0034] Figure 1 This is a schematic diagram of an OLED display circuit structure according to an embodiment of the present invention;

[0035] Figure 2 for Figure 1 A schematic diagram showing the arrangement of the ITO anode line and the first metal trace in an exploded state in one embodiment of the OLED display circuit structure shown.

[0036] Figure 3 This is a longitudinal cross-sectional structural diagram of an OLED segment display device according to an embodiment of the present invention.

[0037] The annotations in the attached figures are explained as follows:

[0038] 1. Substrate; 2. ITO anode; 21. ITO anode trace; 3. Metal conductor layer; 31. First metal trace; 32. Second metal trace; 33. Opening on the first metal trace; 4. Insulating layer; 5. Organic light-emitting layer; 51. Organic light-emitting material; 6. Metal cathode; 7. Cover plate; 8. Light-emitting display pattern. Detailed Implementation

[0039] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0042] This embodiment describes an OLED display circuit structure that drives at least one light-emitting display pattern 8 in the OLED display area, such as... Figure 1 and Figure 2 As shown, it includes:

[0043] substrate1;

[0044] At least one ITO anode trace 21 is disposed on the substrate 1;

[0045] At least one first metal trace 31 is disposed on the ITO anode trace 21 and is located on the side away from the substrate 1;

[0046] The first metal trace 31 has at least one opening 33, the shape of which corresponds to the shape of the light-emitting display pattern 8.

[0047] In this embodiment of the OLED display circuit structure, a first metal trace 31 is added to the traditional ITO anode trace 21 in the display area. An opening 33 corresponding to the shape of the light-emitting display pattern 8 is etched into the first metal trace 31. The vapor-deposited organic light-emitting material 51 enters the opening 33, and a metal cathode is used to excite the organic light-emitting material in the opening 33, allowing the light-emitting display pattern 8 to be displayed normally. However, because the side bright lines formed by the thickness difference between the ITO anode trace and the first metal trace in the light-emitting display pattern 8 area and the non-light-emitting area are overlapped, that is, the bright light generated by the organic light-emitting layer is reflected by the side of the first metal trace, and the reflected light is overlapped with the light-emitting area of ​​the organic light-emitting layer, the brightness of the light-emitting display pattern 8 is enhanced, the optical utilization rate of the light-emitting display pattern 8 is improved, and the overall display effect of the OLED segment display device based on this circuit structure is effectively improved.

[0048] In one embodiment, the thickness of the ITO anode trace 21 is 100-150 nanometers, and the thickness of the first metal trace 31 is 150-250 nanometers.

[0049] In one embodiment, the first metal trace 31 is made of molybdenum-aluminum-molybdenum metal material.

[0050] In one embodiment, a second metal trace 32, serving as a cathode metal side trace, is provided on the outer periphery of the OLED display area. The optimized design of the metal trace in the non-display area of ​​the OLED display circuit structure prevents the light from the illuminated display pattern 8 from scattering outwards, thereby avoiding light leakage caused by reflection from the metal trace.

[0051] Example 2:

[0052] This invention describes an OLED segment display device, such as... Figure 3 As shown, it includes:

[0053] substrate1;

[0054] The ITO anode layer 2 includes at least one ITO anode trace 21, which is disposed on the substrate 1;

[0055] A metal conductor layer 3 is disposed on the ITO anode 2 and located on the side away from the substrate 1;

[0056] An insulating layer 4 is disposed on the metal conductor layer 3 and is located on the side away from the ITO anode 2;

[0057] An organic light-emitting layer 5 is disposed on the insulating layer 4 and located on the side away from the metal wire layer 3;

[0058] The metal cathode 6 includes at least one metal cathode trace, which is disposed on the organic light-emitting layer 5 and located on the side away from the insulating layer 4;

[0059] The metal conductor layer 3 includes at least one first metal trace 31, which is disposed on each ITO anode trace 21, and the first metal trace 31 is located on the side away from the substrate 1. The OLED segment display device has at least one light-emitting display pattern 8, and at least one opening 33 is provided on the first metal trace 31, the shape of the opening 33 corresponding to the shape of the light-emitting display pattern 8.

[0060] The manufacturing process of OLED segment display devices is generally as follows:

[0061] Substrate 1 preparation: Cut the glass or plastic substrate to the finished size and clean and treat the surface to prepare for subsequent thin film deposition;

[0062] Fabrication of ITO anode 2: A transparent ITO (indium tin oxide) material is deposited on one end of a glass substrate to form an ITO anode thin film. The ITO anode thin film is etched into ITO anode traces 21 that are opposite to the design pattern using photolithography.

[0063] The metal conductive layer is fabricated by depositing molybdenum-aluminum-molybdenum material on the ITO anode 2 (the side away from the substrate 1) to form a thin film of metal conductive layer. Photolithography is used to etch the thin film of metal conductive layer into several first metal lines 31, and each first metal line 31 has multiple openings 33. The shape of the openings 33 corresponds to the shape of the light-emitting display pattern 8 of the OLED segment display device. For example, the OLED segment display device has multiple light-emitting display patterns 8, and a certain light-emitting display pattern 8 can be divided into multiple display areas. Corresponding to the light-emitting display pattern 8, several openings 33 are etched into the first metal lines 31 (at the opening 33 positions, there is a height difference between the first metal lines 31 and the ITO anode lines 21 below).

[0064] Fabrication of insulating layer 4: Polyimide material is placed on the metal conductor layer 3 to form a thin film to constitute an insulating layer film. Then, the insulating layer film is etched by photolithography to form insulating layer 4. The insulating layer 4 has corresponding notches corresponding to the light-emitting display pattern 8 so that organic material can be vapor-deposited into the opening 33 of the first metal trace 31 through the notches.

[0065] Organic material deposition: Organic light-emitting material is deposited in the opening 33 by chemical vapor deposition (CVD) combined with mask evaporation to form the organic light-emitting layer 5;

[0066] Cathode fabrication: The metal cathode 6 is formed on the organic light-emitting layer 5 by vapor deposition of cathode material using a RIB separator or by vapor deposition of cathode material using a cathode mask;

[0067] Encapsulation: The cover plate 7 is bonded to the substrate 1 and filled with organic material and protective coating to form an encapsulation structure. The cover plate 7 is disposed on the metal cathode 6 and is located on the side away from the organic light-emitting layer 5.

[0068] According to one embodiment of the present invention, the metal conductor layer 3 further includes at least one second metal trace 32, the second metal trace 32 is disposed on the outer periphery of the OLED segment display device, and the second metal trace 32 is connected to the metal cathode trace, the first metal trace 31 and the second metal trace 32 are made of molybdenum-aluminum-molybdenum metal material.

[0069] Improving the display effect of OLED segment displays does not involve introducing new components and therefore does not increase manufacturing costs. Furthermore, improving the display effect of OLED segment displays does not require increasing brightness by raising voltage, thus ensuring that the lifespan of the display device remains unaffected.

[0070] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An OLED segment display device, characterized by, The OLED segment code display device comprises: a substrate (1); an ITO anode layer (2) comprising at least one ITO anode trace (21) and arranged on the substrate (1); a metal wire layer (3) arranged on the ITO anode layer (2) and located on a side away from the substrate (1); an insulating layer (4) arranged on the metal wire layer (3) and located on a side away from the ITO anode layer (2); an organic light-emitting layer (5) arranged on the insulating layer (4) and located on a side away from the metal wire layer (3); a metal cathode (6) comprising at least one metal cathode trace and arranged on the organic light-emitting layer (5) and located on a side away from the insulating layer (4); wherein the metal wire layer (3) comprises at least one first metal trace (31) arranged on the ITO anode trace (21) and located on a side away from the substrate (1), and has at least one opening (33) on the first metal trace (31), the shape of the opening (33) corresponding to the shape of a light-emitting display pattern (8), and the light-emitting display pattern (8) being located in the opening (33).

2. The OLED segment display device of claim 1, wherein, The thickness of the ITO anode trace (21) is 100-150 nm.

3. The OLED segment display device of claim 1, wherein, The thickness of the first metal trace (31) is 150-250 nm.

4. The OLED segment display device of claim 1, wherein, The ITO anode layer (2) comprises at least one ITO anode trace (21), the metal wire layer (3) comprises at least one first metal trace (31), and the first metal trace (31) is arranged on each ITO anode trace (21) and located on a side away from the substrate (1).

5. The OLED segment display device of claim 4, wherein, The OLED segment code display device has at least one light-emitting display pattern (8), and has at least one opening (33) on the first metal trace (31), the shape of the opening (33) corresponding to the shape of the light-emitting display pattern (8).

6. The OLED segment display device of claim 1, wherein, The metal cathode (6) comprises at least one metal cathode trace, and the metal wire layer (3) further comprises at least one second metal trace (32) arranged on the outer periphery of the OLED segment code display device, and the second metal trace (32) is connected to the metal cathode trace.

7. The OLED segment display device of claim 6, wherein, The first metal trace (31) and the second metal trace (32) are made of molybdenum-aluminum-molybdenum metal material.

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