TW586094B - Top light-emitting type full-color organic light emitting display structure - Google Patents

Abstract

There is provided an top light-emitting type full-color organic light emitting display structure, in which while or blue organic light emitting display device as a light source and a TFT substrate, an organic light emitting display device, a protection layer and a color layer are sequentially combined to form a full-color organic light emitting display structure easy for mass production. By using the protection layer to isolate the organic light emitting display device for avoiding the invasion of oxygen and moisture, and directly manufacturing the color layer on the surface of protection layer, it is able to effectively simplify the process and reduce the packaged size, and accomplish with the existing process, thereby achieving the purpose of cost reduction and practicability.

Description

586094

The invention relates to a full-color organic light-emitting display structure, and more particularly, to a kind of full-color organic light-emitting display structure. [Previous technology] ^ Because the organic light emitting display has the characteristics of low cost, long life, low driving voltage, fast response, good luminous efficiency, temperature difference, shock resistance, high viewing angle and thin thickness, it is known as the next generation of light Display technology. However, due to the short development time of organic electroluminescence display technology, breakthroughs have been made in key components such as ITO conductive glass, small molecule and polymer organic materials / development, process equipment and packaging technology. ~ In the application of displays, full color is a necessary condition for market success. If differentiated by colorization, the structure of organic light-emitting displays can be mainly divided into three-color light-emitting layer structure and color conversion layer (Collar Change Media, CCM). ) There are three ways of color filter structure (Color Filter, CF). Among them, the three-color light-emitting layer structure is the current organic light-emitting display full-scale method. The red, blue, and green light-emitting materials are respectively coated on the book I, and different partial stars are added to produce a full-color effect. The advantage of this technology is that the red, M, and green colors needed to optimize the light efficiency m method = driving voltage, poor color balance, and fineness need to be strengthened. : The same layer is used with a blue organic electroluminescence element, and the two blue-color conversion layers can be used to convert the three colors of red, μ, and green. The color data film is used by white organic electroluminescence elements to achieve full color effect. Although the Houji method sacrifices part of the luminous efficiency, it has a higher squareness in the manufacturing process. The existing color conversion layer and color filter film manufacturing method is feasible

586094 Said amended production number 92108024 _Year of the month 5. Description of the invention (2) The organic electroluminescence element is first made on the board, and then another ~ ϋ _ ^ is used as a color transition film or color conversion layer, and then the lunar substrate =: transparent : Coded as package cover and active base ==; color: luminous quality, and two pieces of broken glass must be precisely aligned, high resolution: easy shadow, and the cost of equipment for precise alignment and pressing is high. Analysis: No, the light-emitting element is highly sensitive to moisture. If added together, the organic light-emitting display and the external seal will make the organic light-emitting display lose light. Chapter 2 How to improve the existing process and structure, Furthermore, the development of a commercial c-type active organic light-emitting display structure has also become an important issue for display: b into the next generation. Mouth [Content of the Invention] In view of the problems of the prior art, the present invention provides a simple and easy to control: a structure of a full-color organic light-emitting display with a top-emission type, which can be completed by the existing private to reduce the cost and practicality of mass production Purpose. The invention is to produce a monochromatic organic electroluminescent element (which can emit white or blue light) directly on a substrate, and then use a protective film to encapsulate the organic electroluminescent element. Under the protection of this protective film, it can block water and oxygen from penetrating into the The electroluminescence element can be made directly on the protective layer by color filter (CF) or color conversion layer (CCM). Therefore, there is no need to make a color filter film or a color conversion layer on another substrate, nor is it necessary to precisely align the two substrates. Only a few thin film processes need to be added to the TFT substrate. It has the advantages of thinness and simple process, and the thickness of the protective layer can be used to control the color filter, light film or color conversion.

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The components are composed of a substrate, an array, an element layer, and an organic and colored or color-to-color layer formed on the table of the moving matrix device. 2. Organic electroluminescence has a plurality of main conductive contacts to form an electrical connection electrode and an electrical connection substrate, and the components are electrically connected to each other. Finally, the electroluminescent element layer is matched with a layer change (CCM) < Red indicator structure. The structural features are as follows: Drawing number 921080? 4 V. Description of the invention (3) Layer change and organic electroluminescence The structure of the present invention is composed of a color layer. The upper surface formed by the base conductive contacts and the active moment element are made of organic electroluminescence. The organic electroluminescence element system covers the surface of the organic electroluminescent element protective layer through the conductive contacts and the main body. In this structure, the organic electroluminescence element uses the light emitted by the color filter (CF) element to pass through a full-color organic light-emitting type. In order to understand the present invention, please refer to the illustration in detail. [Embodiment] Light-emitting element, protection The layered matrix element is connected to the complex conductive substrate. A combination of organic electroluminescent electrodes, which connects the organic electroluminescent elements. The protective layer is then used to make the color layer on the cover. The organic light-emitting layer can be white or blue. Organic light-emitting elements, green, and blue light can be selected. For further functions, please refer to Figure 1. Schematic diagram of an embodiment. The white light organic electroluminescence element is used as the light source, and its main structure is composed of a TFT substrate 100 (which is an active substrate), an organic electroluminescence element 200, a protective layer 300, and a color filter film (c〇iror). , Cp) of 400. As shown in FIG. 1, the TFT substrate 100 is an array formed by a plurality of thin film transistors 110 and corresponding conductive contacts 丨 2 〇, and the conductive contacts 120 thereof can be connected to the TFT substrate V. 1〇〇above the surface and with thin film transistor 11〇

Page 7 586094 __Case No. 92108024_ Year, Month, Date, Amendment ___ V. Description of the invention (4) Forming an electrical connection, in which the material of the TFT substrate 100 can be a glass substrate, a silicon substrate or a plastic substrate. The organic electroluminescent element 2000 is composed of a plurality of lower electrodes 2 1 0, an organic electroluminescent layer 2 3 0, and a plurality of upper electrodes 2 2 0 in sequence, wherein the lower electrode 2 0 is formed on the TFT substrate 1 00, and the organic electroluminescent layer 23 0 is then formed on the aforementioned lower electrode 210, and the upper electrode 2 2 0 is formed on the aforementioned organic electroluminescent layer 230. In this embodiment, the organic electroluminescent layer 230 emits white light (single light). The material can be small molecules or high-photon fluorescence or phosphorescence. The upper electrode 2 2 0 can pass through the conductive contact 1 2 0 to communicate with the thin film. The transistor 110 forms an electrical connection. Then, a protective layer 300 is packaged on the upper surface of the organic electroluminescent device 2000 to prevent water and oxygen from penetrating into the organic electroluminescent device 2000. In this embodiment, the protective layer 300 is The two-layer structure is transparent, and its total film thickness is about 0.05 μm to 100 μm. The protective layer 300 is composed of a buffer layer 3 and a blocking layer 32 0, of which the buffer layer 31 is 0. The system is formed on the top surface of the upper electrode 22o, and the blocking layer 3 2 0 is formed on the top surface of the buffer layer 3o0. In this embodiment, the material of the buffer layer 310 may be selected from parylene, and the material produced by the polymer vapor deposition method may be selected from a diamond-like carbon film (DLC). Electroplating, laser ablation, etc. are produced by one of the vacuum coating methods. The shirt color photo film (CF) 4 0 0 is formed on the top surface of the blocking layer 3 2 0. The formation method can be selected from photolithography, inkjet panting, or transfer printing. ) And so on, one way to make.

Page 8 586094 _j 号 921_W V. Description of the invention (5) According to the structure disclosed in the present invention, the organic electroluminescent layer 23 emits white light upward; it is converted into red (R) by a color filter film (CF) 40 0 According to the technology disclosed by the present inventor, a full-color organic light-emitting display of upper light-emitting type is formed by using two colors of green, green (G), and blue (B). The protective layer 300 is used to directly package the white organic electroluminescent element 2. 〇, under the protection of this protective layer 300, can prevent water and oxygen from penetrating into the organic electroluminescence element 2000, so the color filter film ((: 104) can be made in the protective layer 3 directly 〇〇。 In this way, there is no need to make a color filter film (CF) on another substrate 4 〇 〇, no need for precise alignment of the two substrates, only a TFT substrate 100 plus the number of deaths The thin-film process has the advantages of light weight and simple process, and the gap between the color filter = film (CF) 40 0 and the organic electroluminescent element 200 is determined by the thickness of the protective film, so the gap is easy to control. Among them, since the organic electroluminescent element 2 0 0 has a high degree of moisture To increase the sensitivity of the protective layer 300 to block water and oxygen, you can add another ::: 纟 The material of the moisture absorption layer can be selected from calcium oxide, barium oxide, or oxygen .: Chemical adsorption The material is made by thermal evaporation or electron beam method. The main function of the mouth-wet layer is to absorb the 2000 internal air of the organic electroluminescent element, so as to ensure the ability of the protective layer to block water and oxygen more. Oral application example is shown in Figure 2. In Figure 2, there is a part of the structure that is the same as magic. Therefore, the component names and numbers of Figure i are used. The difference between them is only i = the composition of layer 3 0 0. In the embodiment, the protective layer 300 includes 422, which is composed of the first buffer layer 31 " hygroscopic layer 330 / second buffer layer blocking layer 320, in order, wherein the first buffer layer 311 and the second buffer layer Floor

P.9 586094 Case No. 92108024 ___ ^ __ ^ __ g_ Rev. 丨 Next five, description of the invention (6) The material of 312 can be paryiene, and the material of the blocking layer 3 2 0 can be diamond-like carbon Film, the total thickness of this protective layer 3000 is about 0. 05 microns to 100 microns. In addition to the above two embodiments, some elements of the present invention still have many variations. For example, in order to avoid reflecting ambient light and improve contrast, the TFT substrate can be plated with a film having optical absorption characteristics, that is, an anti-reflection layer. Please refer to FIG. 3, which is a schematic structural diagram of a third embodiment of the present invention. In addition to adding a moisture absorbing layer 3 3 0 to the protective layer 3 0 0 structure, the surface of the TFT substrate 100 is further plated with anti-reflection. The anti-reflection layer 13 can be formed by a vacuum coating method such as a sputtering method, a plasma enhanced car vapor, a p ECVD method, and an ion-assisted evaporation method (I 0 nbeam assisted deposition), and the lower electrode 2iq is formed on the aforementioned anti-reflection layer 1 3 0, and the organic electroluminescent layer 2 3 〇 is formed on the lower electrode 2 1 0 'the upper electrode 2 2 〇 is formed On top of the organic electroluminescent layer 230. In the third embodiment (the third one must be composed of the first buffer layer 3 1 1 / hygroscopic 3 2 0, it may also be composed of the first layer 3 1 0 and the blocking layer 3 2 0. In addition to the above several In addition to the examples, there are many types of organic light-emitting layers that are combined into various forms of the organic structure. In addition to white light (single-light) (single-light) small molecules or high-molecular organic light-emitting organic light-emitting layers that can be used as light sources, ), The composition of the protective layer 300 does not necessarily have the structure of the layer 330 / the second buffer layer 312 / the protective layer 300 of the blocking layer, which only buffers the organic light-emitting display changes disclosed in the present invention, and can be used in conjunction with Display structure. In addition to electroluminescence, materials that emit blue or phosphorescent light can be selected. But if you use the blue ’color layer, you must use a color conversion film.

Page 10 586094 Case No. 92108024 Month Year Amendment V. Description of Invention (7) (CCM) replaces color filter (CF). At the same time, since the organic electroluminescence element is a current-driven element, it is necessary to use more than two active matrix elements to control a single day element, which greatly reduces the aperture ratio and affects the brightness. The present invention adopts the form of upper light emission, which will not affect the rate of lip.

586094 Case No. 92108024 Brief Description of Modified Drawings Figure 1 is a schematic diagram of the first embodiment of the present invention; Figure 2 is a schematic diagram of the second embodiment of the present invention; and Figure 3 is a third embodiment of the present invention Example structure diagram. [Symbol description] 100 TFT substrate 110 Thin film transistor 120 Conductive contact 130 Anti-reflection layer 2 0 0 Organic electroluminescent element 210 Lower electrode 2 2 0 Upper electrode 2 3 0 Organic electroluminescent layer 3 0 0 Protective layer 310 buffer layer 311 first buffer layer 312 second buffer layer 3 2 0 blocking layer 3 3 0 hygroscopic layer 4 0 0 color filter film

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Claims (1)

586094 Case No. 92108024 VI. Application Patent Scope 1. An upper-emitting full-color organic light-emitting display structure including: a substrate having a plurality of active matrix elements, and a meaning _ having a plurality of electrical connections with the active matrix element An organic electroluminescence element containing an organic electroluminescence element is formed on the substrate, and the basin organic electroluminescence element can be electrically connected to the main body through the conductive contact; 1 ordinary piece, a protective layer covering the The electroluminescent device is used to block the penetration of water and oxygen; and a color layer is formed on the protective layer to convert the monochromatic light emitted by the electroluminescent device into red, green and blue The top-emission full-color organic light-emitting device described in the first item of Sanli Liweiwei Project is not active, and the substrate is an active substrate. 3. The above-emission full-color organic radiator structure as described in item 丨 of the patent application, wherein the substrate is a TFT substrate. “” 、、 4 · As described in Item 丨 of the scope of patent application, the above-emitting full-color organic light-emitting display: a beneficial structure, wherein the substrate can be a glass substrate, a silicon substrate or a plastic substrate. / 5. For example, please patent The top-emission full-color organic light-emitting display structure described in the item 丨 above, wherein the organic electroluminescent element further includes: a lower electrode formed on the substrate; an organic electroluminescent layer formed on the read Above the lower electrode; and an upper electrode formed on the organic electroluminescent layer. As described in item 2 of the patent scope of the above-mentioned full-color organic light-emitting display & structure The electroluminescent element further includes: Page 13 5 ^ 6〇94 ^^^ Case No. 92108024_ Cr rp, patent application scope-an anti-reflection layer formed on the substrate; a lower electrode is formed on the anti-reflection layer; a An organic electroluminescent layer is formed on the lower electrode; and an upper electrode is formed on the organic electroluminescent layer. • The top-emission full-color organic light-emitting display as a structure as described in item 1 of the scope of the patent application, wherein the organic electroluminescent element is a small-molecular Laoguang or a 4Sec organic electroluminescent element. 8. The top-emission full-color organic light-emitting display as a structure described in item 1 of the scope of the patent application, wherein the organic electroluminescent element is a polymer glare or phosphorescent organic electroluminescent element. 9 · The top-emission full-color organic light-emitting display structure described in item 1 of the scope of patent application, wherein the organic electroluminescent element is a blue organic electroluminescent element or a white organic electroluminescent element. I 0. The top-emission full-color organic light-emitting display structure described in item 9 of the scope of the patent application, wherein when the organic electroluminescence element is a white light organic electroluminescence element, the color layer is a color filter film. II. The top-emission full-color organic light-emitting display structure according to item 9 of the scope of the patent application, wherein when the organic electroluminescence element is a blue organic electroluminescence element, the color layer is a color conversion layer. 1 2 · The top-emission full-color organic light-emitting display structure described in item 1 of the scope of patent application, wherein the color layer is formed by one of screen printing, yellow light lithography, and ink. I. 1 3. The above-emitting full-color organic light-emitting display structure described in item 1 of the scope of patent application, wherein the protective layer includes: μ Page 14 586094 ____Case No. 92108024___ Month / Day__Amendment__ Sixth, the scope of patent application is a buffer layer formed on the organic electroluminescent element; and a blocking layer formed on the buffer layer. on. 1 4 · The top-emission full-color organic light-emitting display structure described in item 13 of the scope of the patent application, wherein the material of the buffer layer is pary lene. The material of the blocking layer Department of diamond-like carbon film. The top-emission full-color organic light-emitting display as a structure described in item 1 of the scope of the patent application, wherein the protective layer includes: a first buffer layer formed on the organic electroluminescence element; a hygroscopic layer, Formed on the first buffer layer; a second buffer layer formed on the hygroscopic layer; and 16. a blocking layer formed on the second buffer layer. The above-emission full-color organic light-emitting organic light-emitting device described in item 15 of the scope of the patent application, wherein the first buffer layer and the second buffer layer are made of parylene. The material of the blocking layer is a diamond-like carbon film. The material of the hygroscopic layer is selected from the group consisting of calcium oxide, barium oxide, or magnesium oxide. A top-emitting full-color organic light-emitting display structure, wherein the total thickness of the protective layer is from 0.05 μm to 100 μm. Page 15